https://openzfs.org/w/api.php?action=feedcontributions&user=Grahamperrin&feedformat=atomOpenZFS - User contributions [en]2024-03-29T15:08:35ZUser contributionsMediaWiki 1.37.1https://openzfs.org/w/index.php?title=Newcomers&diff=3020Newcomers2021-07-25T09:29:31Z<p>Grahamperrin: https://wiki.freebsd.org/ZFS is explicitly outdated, historic.</p>
<hr />
<div><br />
== Welcome ==<br />
<br />
OpenZFS brings together developers and users from various open-source forks of the original ZFS on different platforms and we're always looking to grow our community.<br />
There are a multitude of ways to contribute to the project and contributors are happy to help newcomers. As we add diverse perspectives, our community becomes richer, and<br />
we're committed to creating an environment where all people feel welcome.<br />
<br />
== Code of Conduct ==<br />
OpenZFS has a Code of Conduct. Before you start participating in the community, please review the [[Code of Conduct]].<br />
<br />
== Newcomer Resources ==<br />
<br />
=== Where can I learn more about OpenZFS? ===<br />
<br />
Here are some introductory resources. For more details about specific parts of ZFS look at the [[Developer_resources | developer resources page]] <br />
{| class="wikitable"<br />
|-<br />
|[https://www.youtube.com/watch?v=MsY-BafQgj4 OpenZFS Basics] || Matt Ahrens and George Wilson || May 2018<br />
|-<br />
|[https://www.youtube.com/watch?v=ptY6-K78McY Lecture on ZFS Read/Write Code Paths ] || Matt Ahrens || March 2016<br />
|-<br />
|[https://www.youtube.com/watch?v=uJGkyMxdNFE&t=1282s OpenZFS Novel Algorithms] || Matt Ahrens || March 2017<br />
|-<br />
|}<br />
<br />
=== I have a question! ===<br />
<br />
We look forward to hearing it! The best way to reach us with questions is by joining our Slack channel #openzfs in [https://openzfs.slack.com OpenZFS@Slack].<br />
<br />
You can also find people on IRC ([ircs://irc.libera.chat/#openzfs #openzfs] on [https://libera.chat Libera.chat]), or the [https://openzfs.topicbox.com/groups/developer/discussions developer@open-zfs.org mailing list].<br />
<br />
=== I'd like to stay informed about events and new features! ===<br />
<br />
Then you should follow us on Twitter [https://twitter.com/OpenZFS @OpenZFS] . This is our main channel for sharing community updates and promotions of ZFS-related events, blogposts, and talks.<br />
<br />
The main OpenZFS-specific events that have been taking place consistently for the past few years are:<br />
* The [[OpenZFS_Developer_Summit_2018 | OpenZFS Developer Summit]]<br />
* The monthly [https://docs.google.com/a/delphix.com/document/d/1w2jv2XVYFmBVvG1EGf-9A5HBVsjAYoLIFZAnWHhV-BM/edit?usp=docs_web OpenZFS Leadership Meetings]<br />
<br />
That said, many other conferences feature OpenZFS related talks.<br />
<br />
=== I'd like to contribute! ===<br />
<br />
That's great! We are always looking to grow our community!<br />
<br />
If you would like to submit a bug or just search for a bug to tackle, below is the list of the code repositories and bug lists for each platform supporting OpenZFS:<br />
{| class="wikitable"<br />
| '''OpenZFS on Linux'''<br />
|[http://zfsonlinux.org Webpage]<br />
|[https://github.com/openzfs/zfs/ Source]<br />
|[https://github.com/openzfs/zfs/issues Issues]<br />
|-<br />
| '''ZFS in FreeBSD'''<br />
|[https://docs.freebsd.org/en/books/handbook/zfs/ FreeBSD Handbook: Chapter 20: The Z File System (ZFS)]<br />
|[https://cgit.freebsd.org/src/log/?h=vendor/openzfs/master Source]<br />
|[https://github.com/zfsonfreebsd/ZoF/issues?q=is%3Aissue Issues]<br />
|-<br />
| '''OpenZFS userland and kernel module for FreeBSD'''<br />
|[https://www.freshports.org/sysutils/openzfs/ sysutils/openzfs] and [https://www.freshports.org/sysutils/openzfs-kmod/ sysutils/openzfs-kmod]<br />
|[https://github.com/zfsonfreebsd/ZoF Source]<br />
|[https://bugs.freebsd.org/bugzilla/buglist.cgi?component=Individual%20Port%28s%29&list_id=432795&product=Ports%20%26%20Packages&query_format=advanced&resolution=---&short_desc=sysutils%2Fopenzfs&short_desc_type=allwordssubstr Issues]<br />
|-<br />
| '''illumos'''<br />
|[http://wiki.illumos.org/display/illumos/ZFS Webpage]<br />
|[https://github.com/illumos/illumos-gate/ Source]<br />
|[https://www.illumos.org/issues Issues]<br />
|-<br />
| '''OpenZFS on OSX'''<br />
|[https://openzfsonosx.org/ Webpage]<br />
|[https://github.com/openzfsonosx/zfs Source]<br />
|[https://github.com/openzfsonosx/zfs/issues Issues]<br />
|-<br />
| '''OpenZFS on Windows'''<br />
|[https://openzfsonwindows.org/ Webpage]<br />
|[https://github.com/openzfsonwindows/ GitHub]<br />
|[https://github.com/openzfsonwindows/ZFSin/issues GitHub]<br />
|}<br />
<br />
If you are just looking for a place to start and get your hands dirty, getting OpenZFS/ZoL set up quickly on your Linux-based computer or in a VM is straightforward (see [https://github.com/zfsonlinux/zfs/wiki/Building-ZFS Building ZoL]).<br />
Then you can try tackling one of the bugs in the [https://github.com/zfsonlinux/zfs/labels/bitesize bitesize] labeled buglist.<br />
<br />
Remember that submitting code in ZFS is not the only way to contribute to the project. Other ways include but are not limited to the following:<br />
* Write high-level utilities and libraries that leverage the power of OpenZFS.<br />
* Write a blogpost or a tutorial for a new feature. We'll do our best to promote it.<br />
* General Wiki and Documentation updates.<br />
* Community (e.g. create meetups or invite OpenZFS experts at events)<br />
<br />
If you are still not sure where to start or you have more questions, you can see what's going on in our #newcomers Slack channel or ping @sara and @serapheim directly.</div>Grahamperrinhttps://openzfs.org/w/index.php?title=Main_Page&diff=2846Main Page2020-01-12T15:51:27Z<p>Grahamperrin: A subtle change to the linked text; I suspect that readers of the main page are not necessarily following the link to History, which describes pulls from illumos.</p>
<hr />
<div>= Welcome to OpenZFS =<br />
__NOTOC__<br />
<br />
OpenZFS brings together developers and users from various open-source forks of the original ZFS on different platforms and we're always looking to grow our community. There are a multitude of ways to contribute to the project and contributors are happy to help newcomers. As we add diverse perspectives, our community becomes richer, and we're committed to creating an environment where all people feel welcome. [[Newcomers | Information for new contributors is available here.]]<br />
<br />
Primary activities of the community include:<br />
* Group discussions in the openzfs slack group (openzfs.slack.com) <== instructions for joining<br />
* Monthly [https://docs.google.com/document/d/1w2jv2XVYFmBVvG1EGf-9A5HBVsjAYoLIFZAnWHhV-BM/edit Leadership Team Meeting]<br />
* Annual [[OpenZFS Developer Summit]]<br />
* Individual and company presentations around the world promoting OpenZFS<br />
* Reduce platform differences (see [https://docs.google.com/spreadsheets/d/1CFapSYxA5QRFYy5k6ge3FutU7zbAWbaeGN2nKVXgxCI/edit#gid=0 ongoing project spreadsheet])<br />
<br />
OpenZFS is an associated project of SPI ([https://www.spi-inc.org/projects/openzfs/ Software in the Public Interest]). SPI is a 501(c)3 nonprofit organization which handles our donations, finances, and legal holdings. You can donate to OpenZFS using the link below:<br />
<br />
<html><br />
<br><br />
<form action="https://www.paypal.com/cgi-bin/webscr" method="post"><br />
<input type="hidden" name="cmd" value="_s-xclick" /><br />
<input type="hidden" name="hosted_button_id" value="X6KB4BFPRFAG6" /><br />
<input type="image" src="https://www.paypalobjects.com/en_US/i/btn/btn_donateCC_LG.gif" name="submit" alt="Donate to OpenZFS via PayPal" /><br />
<img alt="" src="https://www.paypalobjects.com/en_US/i/scr/pixel.gif" width="1" height="1" /><br />
</form><br />
<br><br />
</html><br />
<br />
== Overview ==<br />
<br />
OpenZFS was [[announcement | announced in September 2013]] as the truly '''open source''' [[History | successor to the ZFS project]]. Our community '''brings together developers''' from the illumos, FreeBSD, Linux, macOS, NetBSD, and Windows [[distributions | platforms]], and a wide range of [[companies]] that build products on top of OpenZFS. <br />
<br />
OpenZFS is an '''outstanding storage platform''' that encompasses the functionality of traditional filesystems, volume managers, and more, with consistent reliability, functionality, and performance across all [[distributions]]: <br />
<br />
{| class="wikitable"<br />
| '''illumos'''<br />
|[https://illumos.org/docs/about/features/ Webpage]<br />
|[https://github.com/illumos/illumos-gate/ GitHub]<br />
|-<br />
| '''ZoF – ZFS on FreeBSD'''<br />
|[https://zfsonfreebsd.github.io/ZoF/ Webpage]<br />
|[https://github.com/zfsonfreebsd/ZoF GitHub] <br />
|-<br />
| '''ZoL – ZFS on Linux'''<br />
|[http://zfsonlinux.org/ Webpage]<br />
|[https://github.com/zfsonlinux/zfs/ GitHub]<br />
|-<br />
| '''OpenZFS on macOS'''<br />
|[https://openzfsonosx.org/ Webpage]<br />
|[https://github.com/openzfsonosx/ GitHub]<br />
|-<br />
| '''OpenZFS on Windows'''<br />
|[https://openzfsonwindows.org/ Webpage]<br />
|[https://github.com/openzfsonwindows/ GitHub]<br />
|}<br />
<br />
== [[OpenZFS Developer Summit 2019]] ==<br />
<br />
The seventh annual [[OpenZFS Developer Summit 2019]] conference will be held on '''Nov 4-5, 2019''' in San Francisco, CA.<br />
<br />
Links to slides and recorded presentations can be found on the [[OpenZFS Developer Summit 2019]] event page.<br />
<br />
<br />
===Diamond Sponsors===<br />
<div><ul> <br />
<li style="display: inline-block; padding: 20px;"> [[File: Datto_logo_2015.jpg|100px|link=http://www.datto.com/ | datto ]] </li><br />
<li style="display: inline-block; padding: 20px;"> [[File: Delphix logo.png|150px|link=http://www.delphix.com | Delphix]] </li><br />
<li style="display: inline-block; padding: 20px;"> [[File: Intel.png|80px|link=http://www.intel.com/ | Intel ]] </li><br />
<li style="display: inline-block; padding: 20px;">[[File: OsNexus.png|180x180px|link=http://www.osnexus.com/ | OSNEXUS ]] </li><br />
</ul></div><br />
<br />
== Project Goals ==<br />
<br />
The high-level goals of OpenZFS are to:<br />
* '''raise awareness''' of the quality, utility, and availability of open source implementations of ZFS,<br />
* encourage '''open communication''' about ongoing efforts to improve open source ZFS, and<br />
* ensure '''consistent reliability''', functionality, and performance of all distributions of ZFS.<br />
<br />
The main technical goal of OpenZFS is [https://docs.google.com/spreadsheets/d/1CFapSYxA5QRFYy5k6ge3FutU7zbAWbaeGN2nKVXgxCI/edit#gid=0 easier sharing of code] between platforms.<br />
<br />
== Donate ==<br />
<br />
We accept donations to cover our ongoing costs.<br />
<br />
OpenZFS is an associated project of SPI ([https://www.spi-inc.org/projects/openzfs/ Software in the Public Interest]). SPI is a 501(c)(3) nonprofit organization which handles our donations, finances, and legal holdings. You can donate through paypal using the link below:<br />
<br />
<html><br />
<br><br />
<form action="https://www.paypal.com/cgi-bin/webscr" method="post"><br />
<input type="hidden" name="cmd" value="_s-xclick" /><br />
<input type="hidden" name="hosted_button_id" value="X6KB4BFPRFAG6" /><br />
<input type="image" src="https://www.paypalobjects.com/en_US/i/btn/btn_donateCC_LG.gif" name="submit" alt="Donate to OpenZFS via PayPal" /><br />
<img alt="" src="https://www.paypalobjects.com/en_US/i/scr/pixel.gif" width="1" height="1" /><br />
</form><br />
<br><br />
</html><br />
<br />
== Twitter ==<br />
<br />
<html><br />
<a class="twitter-timeline" width="720" height="437" href="https://twitter.com/OpenZFS" data-widget-id="378639669799288832"> @OpenZFS</a><br />
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<br />
<span><br />
<br><br />
<a href="https://twitter.com/openzfs" class="twitter-follow-button" data-show-count="true">Follow @openzfs</a><br />
<br><br />
<a href="https://twitter.com/share" class="twitter-share-button" data-via="OpenZFS">Tweet</a><br />
</span><br />
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</html></div>Grahamperrinhttps://openzfs.org/w/index.php?title=Main_Page&diff=2719Main Page2019-07-28T16:08:07Z<p>Grahamperrin: 504 gateway time-out at https://wiki.illumos.org/ – https://www.illumos.org/projects/site/wiki directs to a newer address for documentation.</p>
<hr />
<div>= Welcome to OpenZFS =<br />
__NOTOC__<br />
<br />
OpenZFS brings together developers and users from various open-source forks of the original ZFS on different platforms and we're always looking to grow our community. There are a multitude of ways to contribute to the project and contributors are happy to help newcomers. As we add diverse perspectives, our community becomes richer, and we're committed to creating an environment where all people feel welcome. [[Newcomers | Information for new contributors is available here.]]<br />
<br />
== Summary ==<br />
<br />
OpenZFS was [[announcement | announced in September 2013]] as the truly '''open source''' successor to the [[History | ZFS project]]. Our community '''brings together developers''' from the illumos, FreeBSD, Linux, OS X and Windows [[distributions | platforms]], and a wide range of [[companies]] that build products on top of OpenZFS. <br />
<br />
OpenZFS is an '''outstanding storage platform''' that encompasses the functionality of traditional filesystems, volume managers, and more, with consistent reliability, functionality and performance across all [[distributions]]: <br />
<br />
{| class="wikitable"<br />
| '''illumos'''<br />
|[https://illumos.org/docs/about/features/ Webpage]<br />
|[https://github.com/illumos/illumos-gate/ GitHub]<br />
|-<br />
| '''ZoF – ZFS on FreeBSD'''<br />
|[https://zfsonfreebsd.github.io/ZoF/ Webpage]<br />
|[https://github.com/zfsonfreebsd/ZoF GitHub] <br />
|-<br />
| '''ZoL – ZFS on Linux'''<br />
|[http://zfsonlinux.org/ Webpage]<br />
|[https://github.com/zfsonlinux/zfs/ GitHub]<br />
|-<br />
| '''OpenZFS on OS X'''<br />
|[https://openzfsonosx.org/ Webpage]<br />
|[https://github.com/openzfsonosx/ GitHub]<br />
|-<br />
| '''OpenZFS on Windows'''<br />
|[https://openzfsonwindows.org/ Webpage]<br />
|[https://github.com/openzfsonwindows/ GitHub]<br />
|}<br />
<br />
== News ==<br />
A [[Code of Conduct]] has been implemented for the OpenZFS community.<br />
<br />
Matt Ahrens and George Wilson gave a talk on [https://www.socallinuxexpo.org/scale/16x/presentations/openzfs-basics OpenZFS Basics] at SCALE16x, March 2018. [https://docs.google.com/presentation/d/1P2Q_eAgJH_6YorgTHDVgTZQfrBgtGs6VwLBvX7W23FA/edit?usp=sharing Slides] and [https://www.youtube.com/watch?v=MsY-BafQgj4 Video]<br />
<br />
The [http://zfs.datto.com/ ZFS User Conference] was held April 2018. Videos now posted.<br />
<br />
Matt Ahrens gave a talk at BSDCAN: [https://www.bsdcan.org/2018/schedule/events/960.en.html Flexible Disk Use in OpenZFS?], June 2018<br />
<br />
Sara Hartse gave a talk at BSDCAN: [https://www.bsdcan.org/2018/schedule/events/937.en.html 100x Faster Clone Deletion for ZFS], June 2018<br />
<br />
[[OpenZFS_Developer_Summit_2018 | OpenZFS Developer Summit]] was held September 10-11, 2018.<br />
<br />
The first [https://docs.google.com/document/d/1w2jv2XVYFmBVvG1EGf-9A5HBVsjAYoLIFZAnWHhV-BM/edit?ts=5bb3b66c# OpenZFS Leadership Meeting] will be held October 9, 2018<br />
<br />
== [[OpenZFS Developer Summit 2019]] <-- click for more info ==<br />
<br />
The seventh annual conference will be held on '''Nov 4-5, 2019''' in San Francisco, CA. More details to come over the summer (July), but start making plans to be there! Register on [https://www.eventbrite.com/e/openzfs-developer-summit-2019-tickets-62373559997 eventbrite]<br />
<br />
===Diamond Sponsors===<br />
<div><ul> <br />
<li style="display: inline-block; padding: 20px;"> [[File: Datto_logo_2015.jpg|100px|link=http://www.datto.com/ | datto ]] </li><br />
<li style="display: inline-block; padding: 20px;"> [[File: Delphix logo.png|150px|link=http://www.delphix.com | Delphix]] </li><br />
<li style="display: inline-block; padding: 20px;"> [[File: Intel.png|80px|link=http://www.intel.com/ | Intel ]] </li><br />
</ul></div><br />
<br />
See [[OpenZFS Developer Summit 2018|OpenZFS Developer Summit 2018]] page to access talks and videos from last year's conference.<br />
<br />
== Automated Testing ==<br />
<br />
Pull requests submitted to our [https://github.com/openzfs/openzfs/pulls GitHub page] are automatically tested, by running ztest and the ZFS Test Suite. We use illumos VM's running on AWS to perform the tests, and results are available publicly.<br />
<br />
Thanks to infrastructure sponsor Nexenta for covering our AWS hosting costs! [[File: Nexenta-global-leader.jpg|180x180px|link=http://www.nexenta.com/ | Nexenta ]]<br />
<br />
== Goals ==<br />
<br />
The high-level goals of OpenZFS are:<br />
* to '''raise awareness''' of the quality, utility, and availability of open source implementations of ZFS<br />
* to encourage '''open communication''' about ongoing efforts to improve open source ZFS<br />
* to ensure '''consistent reliability''', functionality, and performance of all distributions of ZFS.<br />
<br />
The main technical goal of OpenZFS is '''easier sharing of code''' between platforms. Strategies include:<br />
* creating a platform-independent [[mailing list]] for developers to review ZFS code and architecture changes from all platforms<br />
* smoothing the [[illumos integration process]]<br />
* making it easy to run both ztest and the ZFS test suite (TestRunner or STF based) on each platform<br />
* [[Reduce code differences | reducing code differences]] between the platforms.<br />
<br />
== Donate ==<br />
<br />
We accept donations to cover our ongoing costs.<br />
<br />
OpenZFS is an associated project of SPI ([https://www.spi-inc.org/projects/openzfs/ Software in the Public Interest]). SPI is a 501(c)3 nonprofit organization which handles our donations, finances, and legal holdings. You can donate through paypal using the link below:<br />
<br />
<html><br />
<form action="https://www.paypal.com/cgi-bin/webscr" method="post"><br />
<fieldset><br />
<input type="hidden" name="cmd" value="_s-xclick" /><br />
<input type="hidden" name="hosted_button_id" value="X6KB4BFPRFAG6" /><br />
<input type="image" src="https://www.paypalobjects.com/en_US/i/btn/btn_donateCC_LG.gif" name="submit" alt="Donate to OpenZFS via PayPal" /><br />
<img alt="" src="https://www.paypalobjects.com/en_US/i/scr/pixel.gif" width="1" height="1" /><br />
</fieldset><br />
</form><br />
</html><br />
<br />
== Site orientation ==<br />
* [[FAQ]]<br />
* How to [[participate]]<br />
* [[Companies]] with products that are based on OpenZFS<br />
* Download [[distributions]] that include OpenZFS<br />
* [[Events]] – the forthcoming [[OpenZFS Developer Summit]] and more<br />
* [[Developer resources]]<br />
** [[mailing list]]<br />
** [[illumos integration process]]<br />
** [[contributors]]<br />
** [[platform code differences]]<br />
** [[OpenZFS Office Hours]]<br />
** implementation<br />
*** [[Documentation/ZfsSend | ZFS send]]<br />
*** [[Documentation/Administrative Commands | administrative commands]]<br />
* [[System Administration|Documentation]] for users/sysadmins<br />
** [[features]]<br />
** [[Feature Flags| feature flags]]<br />
** [[Publications| publications and conference talks]]<br />
** [[history]] – from ZFS to OpenZFS<br />
*** OpenZFS launch [[announcement]] – September 2013<br />
** [[performance tuning]]<br />
* [[Projects]]<br />
** [[reduce code differences]]<br />
** the [[Projects/ZFS Channel Programs | ZFS Channel Programs]] (ZCP) proposal<br />
* [[About OpenZFS]]<br />
<br />
[http://open-zfs.org/w/index.php?title=Special%3AAllPages&from=&to=&namespace=0&hideredirects=1 All main pages] (alphabetical order) …<br />
<br />
== Twitter ==<br />
<br />
<html><br />
<a class="twitter-timeline" width="720" height="437" href="https://twitter.com/OpenZFS" data-widget-id="378639669799288832">Tweets by @OpenZFS</a><br />
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<br />
<span><br />
<br><br />
<a href="https://twitter.com/openzfs" class="twitter-follow-button" data-show-count="true">Follow @openzfs</a><br />
<br><br />
<a href="https://twitter.com/share" class="twitter-share-button" data-via="OpenZFS">Tweet</a><br />
</span><br />
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</html></div>Grahamperrinhttps://openzfs.org/w/index.php?title=Main_Page&diff=2718Main Page2019-07-28T10:50:15Z<p>Grahamperrin: ZoF</p>
<hr />
<div>= Welcome to OpenZFS =<br />
__NOTOC__<br />
<br />
OpenZFS brings together developers and users from various open-source forks of the original ZFS on different platforms and we're always looking to grow our community. There are a multitude of ways to contribute to the project and contributors are happy to help newcomers. As we add diverse perspectives, our community becomes richer, and we're committed to creating an environment where all people feel welcome. [[Newcomers | Information for new contributors is available here.]]<br />
<br />
== Summary ==<br />
<br />
OpenZFS was [[announcement | announced in September 2013]] as the truly '''open source''' successor to the [[History | ZFS project]]. Our community '''brings together developers''' from the illumos, FreeBSD, Linux, OS X and Windows [[distributions | platforms]], and a wide range of [[companies]] that build products on top of OpenZFS. <br />
<br />
OpenZFS is an '''outstanding storage platform''' that encompasses the functionality of traditional filesystems, volume managers, and more, with consistent reliability, functionality and performance across all [[distributions]]: <br />
<br />
{| class="wikitable"<br />
| '''illumos'''<br />
|[http://wiki.illumos.org/display/illumos/ZFS Webpage]<br />
|[https://github.com/illumos/illumos-gate/ GitHub]<br />
|-<br />
| '''ZoF – ZFS on FreeBSD'''<br />
|[https://zfsonfreebsd.github.io/ZoF/ Webpage]<br />
|[https://github.com/zfsonfreebsd/ZoF GitHub] <br />
|-<br />
| '''ZoL – ZFS on Linux'''<br />
|[http://zfsonlinux.org/ Webpage]<br />
|[https://github.com/zfsonlinux/zfs/ GitHub]<br />
|-<br />
| '''OpenZFS on OS X'''<br />
|[https://openzfsonosx.org/ Webpage]<br />
|[https://github.com/openzfsonosx/ GitHub]<br />
|-<br />
| '''OpenZFS on Windows'''<br />
|[https://openzfsonwindows.org/ Webpage]<br />
|[https://github.com/openzfsonwindows/ GitHub]<br />
|}<br />
<br />
== News ==<br />
A [[Code of Conduct]] has been implemented for the OpenZFS community.<br />
<br />
Matt Ahrens and George Wilson gave a talk on [https://www.socallinuxexpo.org/scale/16x/presentations/openzfs-basics OpenZFS Basics] at SCALE16x, March 2018. [https://docs.google.com/presentation/d/1P2Q_eAgJH_6YorgTHDVgTZQfrBgtGs6VwLBvX7W23FA/edit?usp=sharing Slides] and [https://www.youtube.com/watch?v=MsY-BafQgj4 Video]<br />
<br />
The [http://zfs.datto.com/ ZFS User Conference] was held April 2018. Videos now posted.<br />
<br />
Matt Ahrens gave a talk at BSDCAN: [https://www.bsdcan.org/2018/schedule/events/960.en.html Flexible Disk Use in OpenZFS?], June 2018<br />
<br />
Sara Hartse gave a talk at BSDCAN: [https://www.bsdcan.org/2018/schedule/events/937.en.html 100x Faster Clone Deletion for ZFS], June 2018<br />
<br />
[[OpenZFS_Developer_Summit_2018 | OpenZFS Developer Summit]] was held September 10-11, 2018.<br />
<br />
The first [https://docs.google.com/document/d/1w2jv2XVYFmBVvG1EGf-9A5HBVsjAYoLIFZAnWHhV-BM/edit?ts=5bb3b66c# OpenZFS Leadership Meeting] will be held October 9, 2018<br />
<br />
== [[OpenZFS Developer Summit 2019]] <-- click for more info ==<br />
<br />
The seventh annual conference will be held on '''Nov 4-5, 2019''' in San Francisco, CA. More details to come over the summer (July), but start making plans to be there! Register on [https://www.eventbrite.com/e/openzfs-developer-summit-2019-tickets-62373559997 eventbrite]<br />
<br />
===Diamond Sponsors===<br />
<div><ul> <br />
<li style="display: inline-block; padding: 20px;"> [[File: Datto_logo_2015.jpg|100px|link=http://www.datto.com/ | datto ]] </li><br />
<li style="display: inline-block; padding: 20px;"> [[File: Delphix logo.png|150px|link=http://www.delphix.com | Delphix]] </li><br />
<li style="display: inline-block; padding: 20px;"> [[File: Intel.png|80px|link=http://www.intel.com/ | Intel ]] </li><br />
</ul></div><br />
<br />
See [[OpenZFS Developer Summit 2018|OpenZFS Developer Summit 2018]] page to access talks and videos from last year's conference.<br />
<br />
== Automated Testing ==<br />
<br />
Pull requests submitted to our [https://github.com/openzfs/openzfs/pulls GitHub page] are automatically tested, by running ztest and the ZFS Test Suite. We use illumos VM's running on AWS to perform the tests, and results are available publicly.<br />
<br />
Thanks to infrastructure sponsor Nexenta for covering our AWS hosting costs! [[File: Nexenta-global-leader.jpg|180x180px|link=http://www.nexenta.com/ | Nexenta ]]<br />
<br />
== Goals ==<br />
<br />
The high-level goals of OpenZFS are:<br />
* to '''raise awareness''' of the quality, utility, and availability of open source implementations of ZFS<br />
* to encourage '''open communication''' about ongoing efforts to improve open source ZFS<br />
* to ensure '''consistent reliability''', functionality, and performance of all distributions of ZFS.<br />
<br />
The main technical goal of OpenZFS is '''easier sharing of code''' between platforms. Strategies include:<br />
* creating a platform-independent [[mailing list]] for developers to review ZFS code and architecture changes from all platforms<br />
* smoothing the [[illumos integration process]]<br />
* making it easy to run both ztest and the ZFS test suite (TestRunner or STF based) on each platform<br />
* [[Reduce code differences | reducing code differences]] between the platforms.<br />
<br />
== Donate ==<br />
<br />
We accept donations to cover our ongoing costs.<br />
<br />
OpenZFS is an associated project of SPI ([https://www.spi-inc.org/projects/openzfs/ Software in the Public Interest]). SPI is a 501(c)3 nonprofit organization which handles our donations, finances, and legal holdings. You can donate through paypal using the link below:<br />
<br />
<html><br />
<form action="https://www.paypal.com/cgi-bin/webscr" method="post"><br />
<fieldset><br />
<input type="hidden" name="cmd" value="_s-xclick" /><br />
<input type="hidden" name="hosted_button_id" value="X6KB4BFPRFAG6" /><br />
<input type="image" src="https://www.paypalobjects.com/en_US/i/btn/btn_donateCC_LG.gif" name="submit" alt="Donate to OpenZFS via PayPal" /><br />
<img alt="" src="https://www.paypalobjects.com/en_US/i/scr/pixel.gif" width="1" height="1" /><br />
</fieldset><br />
</form><br />
</html><br />
<br />
== Site orientation ==<br />
* [[FAQ]]<br />
* How to [[participate]]<br />
* [[Companies]] with products that are based on OpenZFS<br />
* Download [[distributions]] that include OpenZFS<br />
* [[Events]] – the forthcoming [[OpenZFS Developer Summit]] and more<br />
* [[Developer resources]]<br />
** [[mailing list]]<br />
** [[illumos integration process]]<br />
** [[contributors]]<br />
** [[platform code differences]]<br />
** [[OpenZFS Office Hours]]<br />
** implementation<br />
*** [[Documentation/ZfsSend | ZFS send]]<br />
*** [[Documentation/Administrative Commands | administrative commands]]<br />
* [[System Administration|Documentation]] for users/sysadmins<br />
** [[features]]<br />
** [[Feature Flags| feature flags]]<br />
** [[Publications| publications and conference talks]]<br />
** [[history]] – from ZFS to OpenZFS<br />
*** OpenZFS launch [[announcement]] – September 2013<br />
** [[performance tuning]]<br />
* [[Projects]]<br />
** [[reduce code differences]]<br />
** the [[Projects/ZFS Channel Programs | ZFS Channel Programs]] (ZCP) proposal<br />
* [[About OpenZFS]]<br />
<br />
[http://open-zfs.org/w/index.php?title=Special%3AAllPages&from=&to=&namespace=0&hideredirects=1 All main pages] (alphabetical order) …<br />
<br />
== Twitter ==<br />
<br />
<html><br />
<a class="twitter-timeline" width="720" height="437" href="https://twitter.com/OpenZFS" data-widget-id="378639669799288832">Tweets by @OpenZFS</a><br />
<script>!function(d,s,id){var js,fjs=d.getElementsByTagName(s)[0],p=/^http:/.test(d.location)?'http':'https';if(!d.getElementById(id)){js=d.createElement(s);js.id=id;js.src=p+"://platform.twitter.com/widgets.js";fjs.parentNode.insertBefore(js,fjs);}}(document,"script","twitter-wjs");</script><br />
<br />
<span><br />
<br><br />
<a href="https://twitter.com/openzfs" class="twitter-follow-button" data-show-count="true">Follow @openzfs</a><br />
<br><br />
<a href="https://twitter.com/share" class="twitter-share-button" data-via="OpenZFS">Tweet</a><br />
</span><br />
<script>!function(d,s,id){var js,fjs=d.getElementsByTagName(s)[0],p=/^http:/.test(d.location)?'http':'https';if(!d.getElementById(id)){js=d.createElement(s);js.id=id;js.src=p+'://platform.twitter.com/widgets.js';fjs.parentNode.insertBefore(js,fjs);}}(document, 'script', 'twitter-wjs');</script><br />
</html></div>Grahamperrinhttps://openzfs.org/w/index.php?title=Feature_Flags&diff=2233Feature Flags2017-02-04T17:55:54Z<p>Grahamperrin: Oops; not Oracle.</p>
<hr />
<div>ZFS on-disk formats were originally versioned with a single number, which increased whenever the format changed. The numbered approach was suitable when development of ZFS was driven by a single organisation. <br />
<br />
For distributed development of OpenZFS, version numbering was unsuitable. Any change to the number would have required agreement, across all implementations, of each change to the on-disk format. <br />
<br />
OpenZFS feature flags – an alternative to traditional version numbering – allow '''a uniquely named ''pool property'' for each change to the on-disk format'''. This approach supports: <br />
<br />
* format changes that are independent<br />
* format changes that depend on each other. <br />
<br />
== Compatibility ==<br />
<br />
Where all ''features'' that are used by a pool are supported by multiple implementations of OpenZFS, the on-disk format is portable across those implementations. <br />
<br />
Features that are exclusive when enabled should be periodically ported to all distributions.<br />
<br />
== Reference materials ==<br />
<br />
[http://web.archive.org/web/20160419064650/http://blog.delphix.com/csiden/files/2012/01/ZFS_Feature_Flags.pdf ''ZFS Feature Flags''] (Christopher Siden, 2012-01, in the Internet Archive Wayback Machine) in particular: "… Legacy version numbers still exist for pool versions 1-28 …".<br />
<br />
[http://illumos.org/man/5/zpool-features <tt>zpool-features</tt>](5) – illumos<br />
<br />
[https://www.freebsd.org/cgi/man.cgi?query=zpool-features&sektion=7&manpath=FreeBSD <tt>zpool-features</tt>](7) – FreeBSD<br />
<br />
== Feature flags implementation ==<br />
<br />
{| class="wikitable"<br />
!Feature flag<br />
!colspan=4|FreeBSD<br />
!ZFS on Linux<br />
!OpenZFS OSX<br />
!OmniOS<br />
|-<br />
|<br />
| 8.4<br />
| 9.3<br />
| 10.2<br />
| r283009<br />
| 0.6.5<br />
| 1.4.5<br />
| r151014<br />
|-<br />
!async_destroy<br />
|style="background-color:lightgreen"|yes<br />
|style="background-color:lightgreen"|yes<br />
|style="background-color:lightgreen"|yes<br />
|style="background-color:lightgreen"|yes<br />
|style="background-color:lightgreen"|yes<br />
|style="background-color:lightgreen"|yes<br />
|style="background-color:lightgreen"|yes<br />
|-<br />
!empty_bpobj<br />
|style="background-color:lightgreen"|yes<br />
|style="background-color:lightgreen"|yes<br />
|style="background-color:lightgreen"|yes<br />
|style="background-color:lightgreen"|yes<br />
|style="background-color:lightgreen"|yes<br />
|style="background-color:lightgreen"|yes<br />
|style="background-color:lightgreen"|yes<br />
|-<br />
!lz4_compress<br />
|style="background-color:lightgreen"|yes<br />
|style="background-color:lightgreen"|yes<br />
|style="background-color:lightgreen"|yes<br />
|style="background-color:lightgreen"|yes<br />
|style="background-color:lightgreen"|yes<br />
|style="background-color:lightgreen"|yes<br />
|style="background-color:lightgreen"|yes<br />
|-<br />
!multi_vdev_crash_dump<br />
|no<br />
|style="background-color:lightgreen"|yes<br />
|style="background-color:lightgreen"|yes<br />
|style="background-color:lightgreen"|yes<br />
|no<br />
|no<br />
|style="background-color:lightgreen"|yes<br />
|-<br />
!spacemap_histogram<br />
|no<br />
|style="background-color:lightgreen"|yes<br />
|style="background-color:lightgreen"|yes<br />
|style="background-color:lightgreen"|yes<br />
|style="background-color:lightgreen"|yes<br />
|style="background-color:lightgreen"|yes<br />
|style="background-color:lightgreen"|yes<br />
|-<br />
!enabled_txg<br />
|no<br />
|style="background-color:lightgreen"|yes<br />
|style="background-color:lightgreen"|yes<br />
|style="background-color:lightgreen"|yes<br />
|style="background-color:lightgreen"|yes<br />
|style="background-color:lightgreen"|yes<br />
|style="background-color:lightgreen"|yes<br />
|-<br />
!hole_birth<br />
|no<br />
|style="background-color:lightgreen"|yes<br />
|style="background-color:lightgreen"|yes<br />
|style="background-color:lightgreen"|yes<br />
|style="background-color:lightgreen"|yes<br />
|style="background-color:lightgreen"|yes<br />
|style="background-color:lightgreen"|yes<br />
|-<br />
!extensible_dataset<br />
|no<br />
|style="background-color:lightgreen"|yes<br />
|style="background-color:lightgreen"|yes<br />
|style="background-color:lightgreen"|yes<br />
|style="background-color:lightgreen"|yes<br />
|style="background-color:lightgreen"|yes<br />
|style="background-color:lightgreen"|yes<br />
|-<br />
!embedded_data<br />
|no<br />
|no<br />
|style="background-color:lightgreen"|yes<br />
|style="background-color:lightgreen"|yes<br />
|style="background-color:lightgreen"|yes<br />
|style="background-color:lightgreen"|yes<br />
|style="background-color:lightgreen"|yes<br />
|-<br />
!bookmarks<br />
|no<br />
|style="background-color:lightgreen"|yes<br />
|style="background-color:lightgreen"|yes<br />
|style="background-color:lightgreen"|yes<br />
|style="background-color:lightgreen"|yes<br />
|style="background-color:lightgreen"|yes<br />
|style="background-color:lightgreen"|yes<br />
|-<br />
!filesystem_limits<br />
|no<br />
|style="background-color:lightgreen"|yes<br />
|style="background-color:lightgreen"|yes<br />
|style="background-color:lightgreen"|yes<br />
|style="background-color:lightgreen"|yes<br />
|style="background-color:lightgreen"|yes<br />
|style="background-color:lightgreen"|yes<br />
|-<br />
!large_blocks<br />
|no<br />
|no<br />
|style="background-color:lightgreen"|yes<br />
|style="background-color:lightgreen"|yes<br />
|style="background-color:lightgreen"|yes<br />
|style="background-color:lightgreen"|yes<br />
|style="background-color:lightgreen"|yes<br />
|}<br />
<br />
'''Table legend'''<br />
* no = not implemented<br />
* yes = implemented<br />
<br />
Source: [http://blog.vx.sk/archives/44-OpenZFS-Feature-Flags-Compatibility-Matrix.html ''OpenZFS Feature Flags Compatibility Matrix - VX weblog'']</div>Grahamperrinhttps://openzfs.org/w/index.php?title=Feature_Flags&diff=2232Feature Flags2017-02-04T17:09:19Z<p>Grahamperrin: Clarity (recent misunderstanding about version 28); Wayback Machine for a blog post that is no longer served by illumos; a FreeBSD manual page that is not version-specific</p>
<hr />
<div>ZFS on-disk formats were originally versioned with a single number, which increased whenever the format changed. The numbered approach was suitable when development of ZFS was driven by Oracle alone. <br />
<br />
For distributed development of OpenZFS, version numbering was unsuitable. Any change to the number would have required agreement, across all implementations, of each change to the on-disk format. <br />
<br />
OpenZFS feature flags – an alternative to traditional version numbering – allow '''a uniquely named ''pool property'' for each change to the on-disk format'''. This approach supports: <br />
<br />
* format changes that are independent<br />
* format changes that depend on each other. <br />
<br />
== Compatibility ==<br />
<br />
Where all ''features'' that are used by a pool are supported by multiple implementations of OpenZFS, the on-disk format is portable across those implementations. <br />
<br />
Features that are exclusive when enabled should be periodically ported to all distributions.<br />
<br />
== Reference materials ==<br />
<br />
[http://web.archive.org/web/20160419064650/http://blog.delphix.com/csiden/files/2012/01/ZFS_Feature_Flags.pdf ''ZFS Feature Flags''] (Christopher Siden, 2012-01, in the Internet Archive Wayback Machine) in particular: "… Legacy version numbers still exist for pool versions 1-28 …".<br />
<br />
[http://illumos.org/man/5/zpool-features <tt>zpool-features</tt>](5) – illumos<br />
<br />
[https://www.freebsd.org/cgi/man.cgi?query=zpool-features&sektion=7&manpath=FreeBSD <tt>zpool-features</tt>](7) – FreeBSD<br />
<br />
== Feature flags implementation ==<br />
<br />
{| class="wikitable"<br />
!Feature flag<br />
!colspan=4|FreeBSD<br />
!ZFS on Linux<br />
!OpenZFS OSX<br />
!OmniOS<br />
|-<br />
|<br />
| 8.4<br />
| 9.3<br />
| 10.2<br />
| r283009<br />
| 0.6.5<br />
| 1.4.5<br />
| r151014<br />
|-<br />
!async_destroy<br />
|style="background-color:lightgreen"|yes<br />
|style="background-color:lightgreen"|yes<br />
|style="background-color:lightgreen"|yes<br />
|style="background-color:lightgreen"|yes<br />
|style="background-color:lightgreen"|yes<br />
|style="background-color:lightgreen"|yes<br />
|style="background-color:lightgreen"|yes<br />
|-<br />
!empty_bpobj<br />
|style="background-color:lightgreen"|yes<br />
|style="background-color:lightgreen"|yes<br />
|style="background-color:lightgreen"|yes<br />
|style="background-color:lightgreen"|yes<br />
|style="background-color:lightgreen"|yes<br />
|style="background-color:lightgreen"|yes<br />
|style="background-color:lightgreen"|yes<br />
|-<br />
!lz4_compress<br />
|style="background-color:lightgreen"|yes<br />
|style="background-color:lightgreen"|yes<br />
|style="background-color:lightgreen"|yes<br />
|style="background-color:lightgreen"|yes<br />
|style="background-color:lightgreen"|yes<br />
|style="background-color:lightgreen"|yes<br />
|style="background-color:lightgreen"|yes<br />
|-<br />
!multi_vdev_crash_dump<br />
|no<br />
|style="background-color:lightgreen"|yes<br />
|style="background-color:lightgreen"|yes<br />
|style="background-color:lightgreen"|yes<br />
|no<br />
|no<br />
|style="background-color:lightgreen"|yes<br />
|-<br />
!spacemap_histogram<br />
|no<br />
|style="background-color:lightgreen"|yes<br />
|style="background-color:lightgreen"|yes<br />
|style="background-color:lightgreen"|yes<br />
|style="background-color:lightgreen"|yes<br />
|style="background-color:lightgreen"|yes<br />
|style="background-color:lightgreen"|yes<br />
|-<br />
!enabled_txg<br />
|no<br />
|style="background-color:lightgreen"|yes<br />
|style="background-color:lightgreen"|yes<br />
|style="background-color:lightgreen"|yes<br />
|style="background-color:lightgreen"|yes<br />
|style="background-color:lightgreen"|yes<br />
|style="background-color:lightgreen"|yes<br />
|-<br />
!hole_birth<br />
|no<br />
|style="background-color:lightgreen"|yes<br />
|style="background-color:lightgreen"|yes<br />
|style="background-color:lightgreen"|yes<br />
|style="background-color:lightgreen"|yes<br />
|style="background-color:lightgreen"|yes<br />
|style="background-color:lightgreen"|yes<br />
|-<br />
!extensible_dataset<br />
|no<br />
|style="background-color:lightgreen"|yes<br />
|style="background-color:lightgreen"|yes<br />
|style="background-color:lightgreen"|yes<br />
|style="background-color:lightgreen"|yes<br />
|style="background-color:lightgreen"|yes<br />
|style="background-color:lightgreen"|yes<br />
|-<br />
!embedded_data<br />
|no<br />
|no<br />
|style="background-color:lightgreen"|yes<br />
|style="background-color:lightgreen"|yes<br />
|style="background-color:lightgreen"|yes<br />
|style="background-color:lightgreen"|yes<br />
|style="background-color:lightgreen"|yes<br />
|-<br />
!bookmarks<br />
|no<br />
|style="background-color:lightgreen"|yes<br />
|style="background-color:lightgreen"|yes<br />
|style="background-color:lightgreen"|yes<br />
|style="background-color:lightgreen"|yes<br />
|style="background-color:lightgreen"|yes<br />
|style="background-color:lightgreen"|yes<br />
|-<br />
!filesystem_limits<br />
|no<br />
|style="background-color:lightgreen"|yes<br />
|style="background-color:lightgreen"|yes<br />
|style="background-color:lightgreen"|yes<br />
|style="background-color:lightgreen"|yes<br />
|style="background-color:lightgreen"|yes<br />
|style="background-color:lightgreen"|yes<br />
|-<br />
!large_blocks<br />
|no<br />
|no<br />
|style="background-color:lightgreen"|yes<br />
|style="background-color:lightgreen"|yes<br />
|style="background-color:lightgreen"|yes<br />
|style="background-color:lightgreen"|yes<br />
|style="background-color:lightgreen"|yes<br />
|}<br />
<br />
'''Table legend'''<br />
* no = not implemented<br />
* yes = implemented<br />
<br />
Source: [http://blog.vx.sk/archives/44-OpenZFS-Feature-Flags-Compatibility-Matrix.html ''OpenZFS Feature Flags Compatibility Matrix - VX weblog'']</div>Grahamperrinhttps://openzfs.org/w/index.php?title=Performance_tuning&diff=2041Performance tuning2016-01-09T17:03:03Z<p>Grahamperrin: link to manual page for gnop(8); illumos not Illumos; FreeBSD not freeBSD; and working around error 404 for http://ivoras.sharanet.org/blog/tree/2011-01-01.freebsd-on-4k-sector-drives.html</p>
<hr />
<div>Below are tips for various workloads.<br />
<br />
== Basic concepts ==<br />
<br />
Descriptions of ZFS internals that have an effect on application performance follow.<br />
<br />
=== Adaptive Replacement Cache ===<br />
<br />
For decades, operating systems have used RAM as a cache to avoid the necessity of waiting on disk IO, which is extremely slow. This concept is called page replacement. Until ZFS, virtually all filesystems used the Least Recently Used (LRU) page replacement algorithm in which the least recently used pages are the first to be replaced. Unfortunately, the LRU algorithm is vulnerable to cache flushes, where a brief change in workload that occurs occasionally removes all frequently used data from cache. The Adaptive Replacement Cache (ARC) algorithm was implemented in ZFS to replace LRU. It solves this problem by maintaining four lists:<br />
<br />
# A list for recently cached entries.<br />
# A list for recently cached entries that have been accessed more than once.<br />
# A list for entries evicted from #1.<br />
# A list of entries evicited from #2.<br />
<br />
Data is evicted from the first list while an effort is made to keep data in the second list. In this way, ARC is able to outperform LRU by providing a superior hit rate.<br />
<br />
In addition, a dedicated cache device (typically a SSD) can be added to the pool, with <code>zpool add ''poolname'' cache ''devicename''</code>. The cache device is managed by the L2ARC, which scans entries that are next to be evicted and writes them to the cache device. The data stored in ARC and L2ARC can be controlled via the <code>primarycache</code> and <code>secondarycache</code> zfs properties respectively, which can be set on both zvols and datasets. Possible settings are <code>all</code>, <code>none</code> and <code>metadata</code>. It is possible to improve performance when a zvol or dataset hosts an application that does its own caching by caching only metadata. One example is PostgreSQL. Another would be a virtual machine using ZFS.<br />
<br />
=== Alignment Shift (ashift) ===<br />
<br />
Top-level vdevs contain an internal property called ashift, which stands for alignment shift. It is set at vdev creation and it is immutable. It can be read using the <code>zdb</code> command. It is calculated as the maximum base 2 logarithm of the physical sector size of any child vdev and it alters the disk format such that writes are always done according to it. This makes 2^ashift the smallest possible IO on a vdev. Configuring ashift correctly is important because partial sector writes incur a penalty where the sector must be read into a buffer before it can be written. ZFS makes the implicit assumption that the sector size reported by drives is correct and calculates ashift based on that.<br />
<br />
In an ideal world, physical sector size is always reported correctly and therefore, this requires no attention. Unfortunately, this is not the case. The sector size on all storage devices was 512-bytes prior to the creation of flash-based solid state drives. Some operating systems, such as Windows XP, were written under this assumption and will not function when drives report a different sector size.<br />
<br />
Flash-based solid state drives came to market around 2007. These devices report 512-byte sectors, but the actual flash pages, which roughly correspond to sectors, are never 512-bytes. The early models used 4096-byte pages while the newer models have moved to an 8192-byte page. In addition, "Advanced Format" hard drives have been created which also use a 4096-byte sector size. Partial page writes suffer from similar performance degradation as partial sector writes. In some cases, the design of NAND-flash makes the performance degradation even worse, but that is beyond the scope of this description.<br />
<br />
Reporting the correct sector sizes is the responsibility the block device layer. This unfortunately has made proper handling of devices that misreport drives different across different platforms. The respective methods are as follows:<br />
<br />
* [http://wiki.illumos.org/display/illumos/ZFS+and+Advanced+Format+disks#ZFSandAdvancedFormatdisks-OverridingthePhysicalBlockSize sd.conf] on illumos<br />
* [https://www.freebsd.org/cgi/man.cgi?query=gnop&sektion=8&manpath=FreeBSD+10.2-RELEASE gnop(8)] on FreeBSD; see for example [http://web.archive.org/web/20151022020605/http://ivoras.sharanet.org/blog/tree/2011-01-01.freebsd-on-4k-sector-drives.html FreeBSD on 4K sector drives] (2011-01-01)<br />
* [http://zfsonlinux.org/faq.html#HowDoesZFSonLinuxHandlesAdvacedFormatDrives -o ashift=] on ZFS on Linux<br />
* -o ashift= also works with both MacZFS (pool version 8) and ZFS-OSX (pool version 5000).<br />
<br />
-o ashift= is convenient, but it is flawed in that the creation of pools containing top level vdevs that have multiple optimal sector sizes require the use of multiple commands. [http://www.listbox.com/member/archive/182191/2013/07/search/YXNoaWZ0/sort/time_rev/page/2/entry/16:58/20130709002459:82E21654-E84F-11E2-A0FF-F6B47351D2F5/ A newer syntax] that will rely on the actual sector sizes has been discussed as a cross platform replacement and will likely be implemented in the future.<br />
<br />
In addition, [[User:Ryao | Richard Yao]] has contributed a [https://github.com/zfsonlinux/zfs/blob/master/cmd/zpool/zpool_vdev.c#L108 database of drives known to misreport sector sizes] to the ZFS on Linux project. It is used to automatically adjust ashift without the assistance of the system administrator. This approach is unable to fully compensate for misreported sector sizes whenever drive identifiers are used ambiguously (e.g. virtual machines, iSCSI LUNs, some rare SSDs), but it does a great amount of good. The format is roughly compatible with illumos' sd.conf and it is expected that other implementations will integrate the database in future releases. Strictly speaking, this database does not belong in ZFS, but the difficulty of patching the Linux kernel (especially older ones) necessitated that this be implemented in ZFS itself for Linux. The same is true for MacZFS. However, FreeBSD and illumos are both able to implement this in the correct layer.<br />
<br />
=== Compression ===<br />
<br />
Internally, ZFS allocates data using multiples of the device's sector size, typically either 512 bytes or 4KB (see above). When compression is enabled, a smaller number of sectors can be allocated for each block. The uncompressed block size is set by the <code>recordsize</code> (defaults to 128KB) or <code>volblocksize</code> (defaults to 8KB) property (for filesystems vs volumes).<br />
<br />
The following compression algorithms are available:<br />
<br />
* LZ4<br />
** New algorithm added after feature flags were created. It is significantly superior to LZJB in all metrics tested. It is new default compression algorithm (compression=on) in OpenZFS[https://github.com/illumos/illumos-gate/commit/db1741f555ec79def5e9846e6bfd132248514ffe], but not all platforms have adopted the commit changing it yet.<br />
* LZJB<br />
** Original default compression algorithm (compression=on) for ZFS. It was created to satisfy the desire for a compression algorithm suitable for use in filesystems. Specifically, that it provides fair compression, has a high compression speed, has a high decompression speed and detects incompressible data detection quickly.<br />
* GZIP (1 through 9)<br />
** Classic Lempel-Ziv implementation. It provides high compression, but it often makes IO CPU-bound.<br />
* ZLE (Zero Length Encoding)<br />
** A very simple algorithm that only compresses zeroes.<br />
<br />
If you want to use compression and are uncertain which to use, use LZ4. It averages a 2.1:1 compression ratio while gzip-1 averages 2.7:1, but gzip is much slower. Both figures are obtained from [https://code.google.com/p/lz4/ testing by the LZ4 project] on the Silesia corpus. The greater compression ratio of gzip is usually only worthwhile for rarely accessed data.<br />
<br />
=== RAID-Z stripe width ===<br />
<br />
Choose a RAID-Z stripe width based on your IOPS needs and the amount of space you are willing to devote to parity information. If you need more IOPS, use fewer disks per stripe. If you need more usable space, use more disks per stripe. Trying to optimize your RAID-Z stripe width based on exact numbers is irrelevant in nearly all cases. See this [http://blog.delphix.com/matt/2014/06/06/zfs-stripe-width/ blog post] for more details.<br />
<br />
=== Dataset recordsize ===<br />
<br />
ZFS datasets use an internal recordsize of 128KB by default. The dataset recordsize is the basic unit of data used for internal copy-on-write on files. Partial record writes require that data be read from either ARC (cheap) or disk (expensive). recordsize can be set to any power of 2 from 512 bytes to 128 kilobytes. Software that writes in fixed record sizes (e.g. databases) will benefit from the use of a matching recordsize.<br />
<br />
Changing the recordsize on a dataset will only take effect for new files. If you change the recordsize because your application should perform better with a different one, you will need to recreate its files. A cp followed by a mv on each file is sufficient. Alternatively, send/recv should recreate the files with the correct recordsize when a full receive is done.<br />
<br />
=== zvol volblocksize ===<br />
<br />
Zvols have a volblocksize property that is analogous to record size. The default size is 8KB, which is the size of a page on the SPARC architecture. Workloads that use smaller sized IOs (such as swap on x86 which use 4096-byte pages) will benefit from a smaller volblocksize.<br />
<br />
=== Deduplication ===<br />
<br />
Deduplication uses an on-disk hash table, using [http://en.wikipedia.org/wiki/Extensible_hashing extensible hashing] as implemented in the ZAP (ZFS Attribute Processor). Each cached entry uses slightly more than 320 bytes of memory. The DDT code relies on ARC for caching the DDT entries, such that there is no double caching or internal fragmentation from the kernel memory allocator. Each pool has a global deduplication table shared across all datasets and zvols on which deduplication is enabled. Each entry in the hash table is a record of a unique block in the pool. (Where the block size is set by the <code>recordsize</code> or <code>volblocksize</code> properties.)<br />
<br />
The hash table (also known as the DDT or DeDup Table) must be accessed for every dedup-able block that is written or freed (regardless of whether it has multiple references). If there is insufficient memory for the DDT to be cached in memory, each cache miss will require reading a random block from disk, resulting in poor performance. For example, if operating on a single 7200RPM drive that can do 100 io/s, uncached DDT reads would limit overall write throughput to 100 blocks per second, or 400KB/s with 4KB blocks.<br />
<br />
The consequence is that sufficient memory to store deduplication data is required for good performance. The deduplication data is considered metadata and therefore can be cached if the <code>primarycache</code> or <code>secondarycache</code> properties are set to <code>metadata</code>. In addition, the deduplication table will compete with other metadata for metadata storage, which can have a negative effect on performance. Simulation of the number of deduplication table entries needed for a given pool can be done using the -D option to zdb. Then a simple multiplication by 320-bytes can be done to get the approximate memory requirements. Alternatively, you can estimate an upper bound on the number of unique blocks by dividing the amount of storage you plan to use on each dataset (taking into account that partial records each count as a full recordsize for the purposes of deduplication) by the recordsize and each zvol by the volblocksize, summing and then multiplying by 320-bytes.<br />
<br />
=== Metaslab Allocator ===<br />
<br />
ZFS top level vdevs are divided into metaslabs from which blocks can be independently allocated so allow for concurrent IOs to perform allocations without blocking one another. At present, there is a regression[https://github.com/zfsonlinux/zfs/pull/3643] on the Linux and Mac OS X ports that causes serialization to occur.<br />
<br />
By default, the selection of a metaslab is biased toward lower LBAs to improve performance of spinning disks, but this does not make sense on solid state media. This behavior can be adjusted globally by setting the ZFS module's global metaslab_lba_weighting_enabled tuanble to 0. This tunable is only advisable on systems that only use solid state media for pools.<br />
<br />
The metaslab allocator will allocate blocks on a first-fit basis when a metaslab has more than or equal to 4 percent free space and a best-fit basis when a metaslab has less than 4 percent free space. The former is much faster than the latter, but it is not possible to tell when this behavior occurs from the pool's free space. However, the command `zdb -mmm $POOLNAME` will provide this information.<br />
<br />
=== Pool Geometry ===<br />
<br />
If small random IOPS are of primary importance, mirrored vdevs will outperform raidz vdevs. Read IOPS on mirrors will scale with the number of drives in each mirror while raidz vdevs will each be limited to the IOPS of the slowest drive.<br />
<br />
If sequential writes are of primary importance, raidz will outperform mirrored vdevs. Sequential write throughput increases linearly with the number of data disks in raidz while writes are limited to the slowest drive in mirrored vdevs. Sequential read performance should be roughly the same on each.<br />
<br />
Both IOPS and throughput will increase by the respective sums of the IOPS and throughput of each top level vdev, regardless of whether they are raidz or mirrors.<br />
<br />
=== Whole Disks versus Partitions ===<br />
<br />
ZFS will behave differently on different platforms when given a whole disk.<br />
<br />
On illumos, ZFS will enable the write cache on a whole disk while it will leave it set to whatever it was set on a partition. The illumos UFS driver cannot ensure integrity with the write cache enabled, so ZFS avoids enabling the write cache to avoid potentially causing corruption should a UFS filesystem occupy a partition on the disk.<br />
<br />
On Linux, the Linux IO elevator is largely redundant given that ZFS has its own IO elevator, so ZFS will set the IO elevator to noop to avoid unnecessary CPU overhead.<br />
<br />
ZFS will also create a GPT partition table own partitions when given a whole disk under illumos on x86/amd64 and on Linux. This is mainly to make booting through UEFI possible because UEFI requires a small FAT partition to be able to boot the system. The ZFS driver will be able to tell the difference between whether the pool had been given the entire disk or not via the whole_disk field in the label.<br />
<br />
This is not done on FreeBSD. Pools created by FreeBSD will always have the whole_disk field set to true, such that a pool imported on another platform that was created on FreeBSD will always be treated as the whole disks were given to ZFS.<br />
<br />
== General recommendations ==<br />
<br />
=== Alignment shift ===<br />
<br />
Make sure that you create your pools such that the vdevs have the correct alignment shift for your storage device's size. if dealing with flash media, this is going to be either 12 (4K sectors) or 13 (8K sectors). For SSD ephemeral storage on Amazon EC2, the proper setting is 12.<br />
<br />
=== Free Space ===<br />
<br />
Keep pool free space above 10% to avoid many metaslabs from reaching the 4% free space threshold to switch from first-fit to best-fit allocation strategies. When the threshold is hit, the [[Performance_tuning#Metaslab_Allocator|metaslab allocator]] becomes very CPU intensive in an attempt to protect itself from fragmentation. This reduces IOPS, especially as more metaslabs reach the 4% threshold.<br />
<br />
The recommendation is 10% rather than 5% because metaslabs selection considers both location and free space unless the global metaslab_lba_weighting_enabled tunable is set to 0. When that tunable is 0, ZFS will consider only free space, so the the expense of the best-fit allocator can be avoided by keeping free space above 5%. That setting should only be used on systems with pools that consist of solid state drives because it will reduce sequential IO performance on mechanical disks.<br />
<br />
=== LZ4 compression ===<br />
<br />
Set compression=lz4 on your pools' root datasets so that all datasets inherit it unless you have a reason not to enable it. Userland tests of LZ4 compression of incompressible data in a single thread has shown that it can process 10GB/sec, so it is unlikely to be a bottleneck even on incompressible data. The reduction in IO from LZ4 will typically be a performance win.<br />
<br />
=== Pool Geometry ===<br />
<br />
Do not put more than ~16 disks in raidz. The rebuild times on mechanical disks will be excessive when the pool is full.<br />
<br />
=== Synchronous I/O ===<br />
<br />
If your workload involves fsync or O_SYNC and your pool is backed by mechanical storage, consider adding one or more SLOG devices. Pools that have multiple SLOG devices will distribute ZIL operations across them. See [[Hardware#NAND_Flash_SSDs]] for suggestions.<br />
<br />
To ensure maximum ZIL performance on NAND flash SSD-based SLOG devices, you should also overprovison spare area to increase IOPS[http://www.anandtech.com/show/6489/playing-with-op]. You can do this with a mix of a secure erase and a partition table trick, such as the following:<br />
<br />
# Run a secure erase on the NAND-flash SSD.<br />
# Create a partition table on the NAND-flash SSD.<br />
# Create a 4GB partition.<br />
# Give the partition to ZFS to use as a log device.<br />
<br />
If using the secure erase and partition table trick, do ''not'' use the unpartitioned space for other things, even temporarily. That will reduce or eliminate the overprovisioning by marking pages as dirty.<br />
<br />
Alternatively, some devices allow you to change the sizes that they report.This would also work, although a secure erase should be done prior to changing the reported size to ensure that the SSD recognizes the additional spare area. Changing the reported size can be done on drives that support it with `hdparm -N <sectors>` on systems that have laptop-mode-tools.<br />
<br />
The choice of 4GB is somewhat arbitrary. Most systems do not write anything close to 4GB to ZIL between transaction group commits, so overprovisioning all storage beyond the 4GB partition should be alright. If a workload needs more, then make it no more than the maximum ARC size. Even under extreme workloads, ZFS will not benefit from more SLOG storage than the maximum ARC size. That is half of system memory on Linux and 3/4 of system memory on illumos.<br />
<br />
=== Whole disks ===<br />
<br />
Whole disks should be given to ZFS rather than partitions. If you must use a partition, make certain that the partition is properly aligned to avoid read-modify-write overhead. See the section on [[Performance_tuning#Alignment_Shift_.28ashift.29 | Alignment Shift]] for a description of proper alignment. Also, see the section on [[Performance_tuning#Whole Disks versus Partitions|Whole Disks versus Partitions]] for a description of changes in ZFS behavior when operating on a partition.<br />
<br />
Single disk RAID 0 arrays from RAID controllers are not equivalent to whole disks. The [[Hardware#Hardware_RAID_controllers| Hardware]] page explains in detail.<br />
<br />
== Bit Torrent ==<br />
<br />
Bit torrent performs 16KB random reads/writes. The 16KB writes cause read-modify-write overhead. The read-modify-write overhead can reduce performance by a factor of 16 with 128KB record sizes when the amount of data written exceeds system memory. This can be avoided by using a dedicated dataset for bit torrent downloads with recordsize=16KB.<br />
<br />
When the files are read sequentially through a HTTP server, the random nature in which the files were generated creates fragmentation that has been observed to reduce sequential read performance by a factor of two on 7200RPM hard disks. If performance is a problem, fragmentation can be eliminated by rewriting the files sequentially in either of two ways:<br />
<br />
The first method is to configure your client to download the files to a temporary directory and then copy them into their final location when the downloads are finished, provided that your client supports this.<br />
<br />
The second method is to use send/recv to recreate a dataset sequentially.<br />
<br />
In practice, defragmenting files obtained through bit torrent should only improve performance when the files are stored on magnetic storage and are subject to significant sequential read workloads after creation.<br />
<br />
== Database workloads ==<br />
<br />
=== MySQL ===<br />
<br />
==== InnoDB ====<br />
<br />
Make separate datasets for InnoDB's data files and log files. Set recordsize=16K on InnoDB's data files to avoid expensive partial record writes and leave recordsize=128K on the log files. Set primarycache=metadata on both to prefer InnoDB's caching.[https://www.patpro.net/blog/index.php/2014/03/09/2617-mysql-on-zfs-on-freebsd/] Set logbias=throughput on the data to stop ZIL from writing twice.<br />
<br />
Set skip-innodb_doublewrite in my.cnf to prevent innodb from also writing twice. The double writes are a data integrity feature meant to protect against partially-written pages, but those are not possible on ZFS, so it is safe to disable.[https://www.percona.com/blog/2014/05/23/improve-innodb-performance-write-bound-loads/]<br />
<br />
==== MyISAM ====<br />
<br />
Put MyISAM databases on a dataset with recordsize=8K.<br />
<br />
=== PostgreSQL ===<br />
<br />
Make separate datasets for PostgreSQL's data and WAL. Set recordsize=8K on both to avoid expensive partial record writes. Set logbias=throughput on PostgreSQL's data to avoid writing twice.<br />
<br />
== Virtual machines ==<br />
<br />
Virtual machine images on ZFS should be stored using either zvols or raw files to avoid unnecessary overhead. The recordsize/volblocksize and guest filesystem should be configured to match to avoid overhead from partial record modification. This would typically be 4K. If raw files are used, a separate dataset should be used to make it easy to configure recordsize independently of other things stored on ZFS.<br />
<br />
=== QEMU / KVM / Xen ===<br />
<br />
AIO should be used to maximize IOPS when using files for guest storage.</div>Grahamperrinhttps://openzfs.org/w/index.php?title=Distributions&diff=2039Distributions2015-12-24T10:52:25Z<p>Grahamperrin: reference to PDF, consistent with the resolution at https://bugs.pcbsd.org/issues/10828#note-2</p>
<hr />
<div>Open source distributions of OpenZFS are available for the following open source platforms. <br />
<br />
(For commercial products, see [[companies]].)<br />
<br />
== Darwin ==<br />
<br />
{|cellpadding="15"<br />
|[[File:UNIX-based.jpg | link=http://www.opensource.apple.com]]<br />
|<br />
At the core of [http://www.opengroup.org/openbrand/register/brand3612.htm Mac® OS X® El Capitan, which is certified to The Open Group UNIX® 03 standard], are [http://opensource.apple.com Apple® open source] [http://en.wikipedia.org/wiki/Darwin_(operating_system) Darwin] technologies. <br />
|}<br />
<br />
=== OpenZFS on OS X ===<br />
{|cellpadding="20" | width="100%"<br />
|<br />
[https://openzfsonosx.org OpenZFS on OS X] (O3X) brings OpenZFS features to Apple's OS X.<br />
<br />
The installer [https://openzfsonosx.org/wiki/Downloads release] of OpenZFS on OS X is [[OpenZFSOnOSX|ready for use]] by people who are comfortable with administering ZFS from the Terminal or who are willing to learn to do so. It's compatible with OS X 10.8 through OS X 10.11 (Mountain Lion, Mavericks, Yosemite and El Capitan). <br />
<br />
| align="right" valign="text-top"| [[file:o3x-logo.png | link=https://openzfsonosx.org]]<br />
|}<br />
<br />
== FreeBSD® ==<br />
<br />
{|cellpadding="15"<br />
|[[file:FreeBSD-logo.png | 120px | link=http://www.freebsd.org/]]<br />
|<br />
A full general purpose operating system with several specialized distributions.<br />
|}<br />
<br />
=== Debian® GNU/kFreeBSD ===<br />
{|cellpadding="25" | width="100%"<br />
|<br />
[https://wiki.debian.org/Debian_GNU/kFreeBSD Debian® GNU/kFreeBSD] is a general purpose GNU distribution for amd64/i386 that uses the FreeBSD kernel, which provides an OpenZFS implementation.<br />
<br />
An official Debian release, still using GNU libc and with ninety percent of the same software packages available.<br />
<br />
The ''wheezy'' stable release:<br />
* can dual-boot 9.0 (default) or 8.3 kernels of FreeBSD<br />
* uses pool version 28 (deduplication, raidz3, removable log devices)<br />
* lacks support for ''ashift='', and important development tools like DTrace<br />
* installer supports creation of pools, installing to them, and booting directly from them with GRUB2.<br />
<br />
The ''testing'' release will be updated with new FreeBSD kernel releases, gaining many OpenZFS enhancements, including support for lz4 compression.<br />
| align="right" valign="text-top" | [[file:Debian-openlogo-100.jpg | 80px | link=https://wiki.debian.org/Debian_GNU/kFreeBSD]]<br />
|}<br />
<br />
=== FreeBSD ===<br />
{|cellpadding="10" | width="100%"<br />
|<br />
[http://www.freebsd.org/ FreeBSD] is a general purpose server operating system. Versions 8.4 and 9.2 are OpenZFS; prior versions lack the associated feature set.<br />
* [http://www.freebsd.org/releases/ Download]<br />
* browse ZFS source code in [https://github.com/freebsd/freebsd/tree/master/sys/cddl/contrib/opensolaris/uts/common/fs/zfs GitHub] or [http://svnweb.freebsd.org/base/head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/ websvn] or [http://nxr.netbsd.org/search?q=&project=src-freebsd OpenGrok].<br />
| align="right" valign="text-top" | [[file:FreeBSD-logo.png |120px|link=http://freebsd.org]]<br />
|}<br />
<br />
=== FreeNAS® ===<br />
{|cellpadding="10" | width="100%"<br />
|<br />
[http://www.freenas.org/ FreeNAS] is NAS appliance software.<br />
<br />
[http://www.ixsystems.com/storage/ix/truenas/ Commercial support] is available for sister product TrueNAS from iXsystems.<br />
| align="right" valign="text-top" | [[file:FreeNAS_Shark_Transparent_on_dark.png |120px|link=http://www.freenas.org/]]<br />
|}<br />
<br />
=== PC-BSD® ===<br />
{|cellpadding="10" | width="100%"<br />
|<br />
[http://www.pcbsd.org/ PC-BSD] is a workstation/desktop operating system.<br />
<br />
[https://webnew.ixsystems.com/wp-content/uploads/2015/07/iXsystems_ProfessionalServices_Brochure_WEB1.pdf Professional FreeBSD/PC-BSD Enterprise & Desktop Support Services] are available from iXsystems.<br />
| align="right" valign="text-top" | [[file:Pcbsd-logo.png|120px|link=http://www.pcbsd.org/]]<br />
|}<br />
<br />
== illumos ==<br />
{|cellpadding="15"<br />
|[[file:BigHighResPhoenixLogotypeRGB.png |120px|link=http://illumos.org]]<br />
|<br />
The [http://www.illumos.org illumos] codebase is the foundation for various distributions – comparable to the relationship between the Linux kernel and Linux distributions.<br />
The codebase originated as a fork from the last release of OpenSolaris.<br />
* Browse ZFS source code in [http://src.illumos.org/source/xref/illumos-gate/usr/src/uts/common/fs/zfs opengrok] or [https://github.com/illumos/illumos-gate/tree/master/usr/src/uts/common/fs/zfs GitHub].<br />
|}<br />
<br />
=== OmniOS ===<br />
{|cellpadding="15" | width="100%"<br />
|<br />
[http://omnios.omniti.com/ OmniOS] is a general purpose server operating system. <br />
<br />
[http://omniti.com/does/omnios Commercial support] is available from [http://omniti.com/ OmniTI].<br />
<br />
* [http://omnios.omniti.com/wiki.php/Installation Download]<br />
* [https://github.com/omniti-labs/illumos-omnios/tree/master/usr/src/uts/common/fs/zfs source code]<br />
| align="right" valign="text-top"| [[file:OmniOS_logo.png |100px|link=http://omnios.omniti.com/]]<br />
|}<br />
<br />
=== OpenIndiana ===<br />
{|cellpadding="8" | width="100%"<br />
|<br />
[http://openindiana.org/ OpenIndiana] (OI) is a general purpose server operating system.<br />
<br />
* [http://openindiana.org/download/ Download]<br />
* [https://hg.openindiana.org/ source code]<br />
| align="right" valign="text-top" | [[file:OpenIndiana_logo_x1200.png |120px|link=http://openindiana.org/]]<br />
|}<br />
<br />
=== SmartOS™ ===<br />
{|cellpadding="8" | width="100%"<br />
|<br />
[http://smartos.org SmartOS] is a specialised type 1 hypervisor platform that is lean enough to run entirely in memory and powerful enough to run as much as you want to throw at it. Provisioning is blindingly fast, thanks to zones and ZFS file system creation. SmartOS is a fundamental component of the [http://www.joyent.com/products/private-cloud Joyent® SmartDataCenter™] (SDC) product.<br />
* [http://wiki.smartos.org/display/DOC/Download+SmartOS Download]<br />
* [https://github.com/joyent/smartos-live source code]<br />
| align="right" valign="text-top" | [[File:Smartos-stacked-blue.png | 120px | link= http://smartos.org]]<br />
|}<br />
<br />
== Linux ==<br />
<br />
Since its inception in the 1990s, the Linux operating system has become the most widely used software in the world.<br />
<br />
=== Gentoo ===<br />
{|cellpadding="10" | width="100%"<br />
|<br />
[http://www.gentoo.org Gentoo] provides first-party [[#ZFS_on_Linux | ZFS on Linux]] packages to itself and its derivatives. <br />
<br />
Gentoo can be automatically optimized and customized for just about any application or need. Extreme configurability, performance and a top-notch user and developer community are all hallmarks of the Gentoo experience.<br />
<br />
Derivatives include: <br />
| align="right" valign="text-top" | [[file:Gblend.png |80px|link=http://www.gentoo.org/]]<br />
|-<br />
|<br />
* [http://www.funtoo.org Funtoo Linux], which features native UTF-8 support enabled by default, a git-based, distributed Portage Tree and funtoo overlay, an enhanced Portage with more compact mini-manifest tree, automated imports of new Gentoo changes every 12 hours, GPT/GUID boot support and streamlined boot configuration, enhanced network configuration, up-to-date stable and current Funtoo stages, all built using Funtoo's Metro build tool<br />
| align="right" valign="text-top"| [[file:Funtoo.png |80px|link=http://www.funtoo.org]]<br />
|-<br />
|<br />
* [http://www.pentoo.ch Pentoo], a security-focused livecd<br />
| [[file:PentooLogo.jpeg |120px|link=http://www.pentoo.ch]]<br />
|-<br />
|<br />
* [http://www.sabayon.org Sabayon], which emanates substantially from Gentoo's testing branch. <br />
| [[file:Sabayon-logo.png |120px|link=http://www.sabayon.org]]<br />
|}<br />
<br />
=== ZFS on Linux ===<br />
{|cellpadding="10" | width="100%"<br />
|<br />
[http://www.zfsonlinux.org ZFS on Linux] provides self-building packages for Debian, Fedora, RHEL/CentOS/SL, Ubuntu and build instructions for several other distributions. <br />
* Implemented in the kernel <br />
* maintained in a code repository that is independent from the mainline kernel.<br />
| align="right" valign="text-top"| [[file:zfs-linux.png |100px|link=http://zfsonlinux.org/]]<br />
|}<br />
<br />
== OSv ==<br />
<br />
{|cellpadding="15"<br />
|<br />
[http://osv.io OSv] is a new operating system designed for the cloud. It only runs virtualized, and the only file system it supports is ZFS.<br />
* Implemented in the kernel <br />
* ZFS codebase forked from FreeBSD; but planning to move to open-zfs.org upstream ASAP.<br />
|[[file:osv.png |100px|link=http://osv.io/]]<br />
|}<br />
<br />
----<br />
<center>Distribution logos used with permission. All trademarks are the property of their respective owners.</center></div>Grahamperrinhttps://openzfs.org/w/index.php?title=Distributions&diff=2021Distributions2015-11-15T10:35:17Z<p>Grahamperrin: El Capitan – The Open Brand - Register of Certified Products</p>
<hr />
<div>Open source distributions of OpenZFS are available for the following open source platforms. <br />
<br />
(For commercial products, see [[companies]].)<br />
<br />
== Darwin ==<br />
<br />
{|cellpadding="15"<br />
|[[File:UNIX-based.jpg | link=http://www.opensource.apple.com]]<br />
|<br />
At the core of [http://www.opengroup.org/openbrand/register/brand3612.htm Mac® OS X® El Capitan, which is certified to The Open Group UNIX® 03 standard], are [http://opensource.apple.com Apple® open source] [http://en.wikipedia.org/wiki/Darwin_(operating_system) Darwin] technologies. <br />
|}<br />
<br />
=== OpenZFS on OS X ===<br />
{|cellpadding="20" | width="100%"<br />
|<br />
[https://openzfsonosx.org OpenZFS on OS X] (O3X) brings OpenZFS features to Apple's OS X.<br />
<br />
The installer [https://openzfsonosx.org/wiki/Downloads release] of OpenZFS on OS X is [[OpenZFSOnOSX|ready for use]] by people who are comfortable with administering ZFS from the Terminal or who are willing to learn to do so. It's compatible with OS X 10.8 through OS X 10.10 (Mountain Lion, Mavericks, and Yosemite). <br />
<br />
O3X is a port of ZFS on Linux®. <br />
| align="right" valign="text-top"| [[file:o3x-logo.png | link=https://openzfsonosx.org]]<br />
|}<br />
<br />
== FreeBSD® ==<br />
<br />
{|cellpadding="15"<br />
|[[file:FreeBSD-logo.png | 120px | link=http://www.freebsd.org/]]<br />
|<br />
A full general purpose operating system with several specialized distributions.<br />
|}<br />
<br />
=== Debian® GNU/kFreeBSD ===<br />
{|cellpadding="25" | width="100%"<br />
|<br />
[https://wiki.debian.org/Debian_GNU/kFreeBSD Debian® GNU/kFreeBSD] is a general purpose GNU distribution for amd64/i386 that uses the FreeBSD kernel, which provides an OpenZFS implementation.<br />
<br />
An official Debian release, still using GNU libc and with ninety percent of the same software packages available.<br />
<br />
The ''wheezy'' stable release:<br />
* can dual-boot 9.0 (default) or 8.3 kernels of FreeBSD<br />
* uses pool version 28 (deduplication, raidz3, removable log devices)<br />
* lacks support for ''ashift='', and important development tools like DTrace<br />
* installer supports creation of pools, installing to them, and booting directly from them with GRUB2.<br />
<br />
The ''testing'' release will be updated with new FreeBSD kernel releases, gaining many OpenZFS enhancements, including support for lz4 compression.<br />
| align="right" valign="text-top" | [[file:Debian-openlogo-100.jpg | 80px | link=https://wiki.debian.org/Debian_GNU/kFreeBSD]]<br />
|}<br />
<br />
=== FreeBSD ===<br />
{|cellpadding="10" | width="100%"<br />
|<br />
[http://www.freebsd.org/ FreeBSD] is a general purpose server operating system. Versions 8.4 and 9.2 are OpenZFS; prior versions lack the associated feature set.<br />
* [http://www.freebsd.org/releases/ Download]<br />
* browse ZFS source code in [https://github.com/freebsd/freebsd/tree/master/sys/cddl/contrib/opensolaris/uts/common/fs/zfs GitHub] or [http://svnweb.freebsd.org/base/head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/ websvn] or [http://nxr.netbsd.org/search?q=&project=src-freebsd OpenGrok].<br />
| align="right" valign="text-top" | [[file:FreeBSD-logo.png |120px|link=http://freebsd.org]]<br />
|}<br />
<br />
=== FreeNAS® ===<br />
{|cellpadding="10" | width="100%"<br />
|<br />
[http://www.freenas.org/ FreeNAS] is NAS appliance software.<br />
<br />
[http://www.ixsystems.com/storage/ix/truenas/ Commercial support] is available for sister product TrueNAS from iXsystems.<br />
| align="right" valign="text-top" | [[file:FreeNAS_Shark_Transparent_on_dark.png |120px|link=http://www.freenas.org/]]<br />
|}<br />
<br />
=== PC-BSD® ===<br />
{|cellpadding="10" | width="100%"<br />
|<br />
[http://www.pcbsd.org/ PC-BSD] is a workstation/desktop operating system.<br />
<br />
[http://www.ixsystems.com/support-center/ix/software/pc-bsd.html Commercial support] is available from iXsystems.<br />
| align="right" valign="text-top" | [[file:Pcbsd-logo.png|120px|link=http://www.pcbsd.org/]]<br />
|}<br />
<br />
== illumos ==<br />
{|cellpadding="15"<br />
|[[file:BigHighResPhoenixLogotypeRGB.png |120px|link=http://illumos.org]]<br />
|<br />
The [http://www.illumos.org illumos] codebase is the foundation for various distributions – comparable to the relationship between the Linux kernel and Linux distributions.<br />
The codebase originated as a fork from the last release of OpenSolaris.<br />
* Browse ZFS source code in [http://src.illumos.org/source/xref/illumos-gate/usr/src/uts/common/fs/zfs opengrok] or [https://github.com/illumos/illumos-gate/tree/master/usr/src/uts/common/fs/zfs GitHub].<br />
|}<br />
<br />
=== OmniOS ===<br />
{|cellpadding="15" | width="100%"<br />
|<br />
[http://omnios.omniti.com/ OmniOS] is a general purpose server operating system. <br />
<br />
[http://omniti.com/does/omnios Commercial support] is available from [http://omniti.com/ OmniTI].<br />
<br />
* [http://omnios.omniti.com/wiki.php/Installation Download]<br />
* [https://github.com/omniti-labs/illumos-omnios/tree/master/usr/src/uts/common/fs/zfs source code]<br />
| align="right" valign="text-top"| [[file:OmniOS_logo.png |100px|link=http://omnios.omniti.com/]]<br />
|}<br />
<br />
=== OpenIndiana ===<br />
{|cellpadding="8" | width="100%"<br />
|<br />
[http://openindiana.org/ OpenIndiana] (OI) is a general purpose server operating system.<br />
<br />
* [http://openindiana.org/download/ Download]<br />
* [https://hg.openindiana.org/ source code]<br />
| align="right" valign="text-top" | [[file:OpenIndiana_logo_x1200.png |120px|link=http://openindiana.org/]]<br />
|}<br />
<br />
=== SmartOS™ ===<br />
{|cellpadding="8" | width="100%"<br />
|<br />
[http://smartos.org SmartOS] is a specialised type 1 hypervisor platform that is lean enough to run entirely in memory and powerful enough to run as much as you want to throw at it. Provisioning is blindingly fast, thanks to zones and ZFS file system creation. SmartOS is a fundamental component of the [http://www.joyent.com/products/private-cloud Joyent® SmartDataCenter™] (SDC) product.<br />
* [http://wiki.smartos.org/display/DOC/Download+SmartOS Download]<br />
* [https://github.com/joyent/smartos-live source code]<br />
| align="right" valign="text-top" | [[File:Smartos-stacked-blue.png | 120px | link= http://smartos.org]]<br />
|}<br />
<br />
== Linux ==<br />
<br />
Since its inception in the 1990s, the Linux operating system has become the most widely used software in the world.<br />
<br />
=== Gentoo ===<br />
{|cellpadding="10" | width="100%"<br />
|<br />
[http://www.gentoo.org Gentoo] provides first-party [[#ZFS_on_Linux | ZFS on Linux]] packages to itself and its derivatives. <br />
<br />
Gentoo can be automatically optimized and customized for just about any application or need. Extreme configurability, performance and a top-notch user and developer community are all hallmarks of the Gentoo experience.<br />
<br />
Derivatives include: <br />
| align="right" valign="text-top" | [[file:Gblend.png |80px|link=http://www.gentoo.org/]]<br />
|-<br />
|<br />
* [http://www.funtoo.org Funtoo Linux], which features native UTF-8 support enabled by default, a git-based, distributed Portage Tree and funtoo overlay, an enhanced Portage with more compact mini-manifest tree, automated imports of new Gentoo changes every 12 hours, GPT/GUID boot support and streamlined boot configuration, enhanced network configuration, up-to-date stable and current Funtoo stages, all built using Funtoo's Metro build tool<br />
| align="right" valign="text-top"| [[file:Funtoo.png |80px|link=http://www.funtoo.org]]<br />
|-<br />
|<br />
* [http://www.pentoo.ch Pentoo], a security-focused livecd<br />
| [[file:PentooLogo.jpeg |120px|link=http://www.pentoo.ch]]<br />
|-<br />
|<br />
* [http://www.sabayon.org Sabayon], which emanates substantially from Gentoo's testing branch. <br />
| [[file:Sabayon-logo.png |120px|link=http://www.sabayon.org]]<br />
|}<br />
<br />
=== ZFS on Linux ===<br />
{|cellpadding="10" | width="100%"<br />
|<br />
[http://www.zfsonlinux.org ZFS on Linux] provides self-building packages for Debian, Fedora, RHEL/CentOS/SL, Ubuntu and build instructions for several other distributions. <br />
* Implemented in the kernel <br />
* maintained in a code repository that is independent from the mainline kernel.<br />
| align="right" valign="text-top"| [[file:zfs-linux.png |100px|link=http://zfsonlinux.org/]]<br />
|}<br />
<br />
== OSv ==<br />
<br />
{|cellpadding="15"<br />
|<br />
[http://osv.io OSv] is a new operating system designed for the cloud. It only runs virtualized, and the only file system it supports is ZFS.<br />
* Implemented in the kernel <br />
* ZFS codebase forked from FreeBSD; but planning to move to open-zfs.org upstream ASAP.<br />
|[[file:osv.png |100px|link=http://osv.io/]]<br />
|}<br />
<br />
----<br />
<center>Distribution logos used with permission. All trademarks are the property of their respective owners.</center></div>Grahamperrinhttps://openzfs.org/w/index.php?title=Features&diff=1666Features2015-02-12T05:16:24Z<p>Grahamperrin: Attention to https://www.freebsd.org/cgi/man.cgi?query=zpool-features&sektion=7&manpath=FreeBSD+10.1-RELEASE</p>
<hr />
<div>This page describes some of the more important features and performance improvements that are part of OpenZFS.<br />
<br />
Help would be appreciated in porting features between platforms whose status is "not yet".<br />
<br />
== Feature Flags ==<br />
<br />
{| class="wikitable"<br />
|<br />
| '''illumos'''<br />
| '''FreeBSD'''<br />
| '''ZFS on Linux'''<br />
| '''OpenZFS on OS X'''<br />
|-<br />
| '''async_destroy'''<br />
| Y<br />
| Y<br />
| Y<br />
| Y<br />
|-<br />
| '''bookmarks'''<br />
| Y<br />
| Y<br />
| N<br />
| Y<br />
|-<br />
| '''embedded_data'''<br />
| Y<br />
| Y<br />
| <br />
| Y<br />
|-<br />
| '''empty_bpobj'''<br />
| Y<br />
| Y<br />
| Y<br />
| Y<br />
|-<br />
| '''enabled_txg'''<br />
| Y<br />
| Y<br />
| N<br />
| Y<br />
|-<br />
| '''extensible_dataset'''<br />
| Y<br />
| Y<br />
| N<br />
| Y<br />
|-<br />
| '''filesystem_limits'''<br />
| Y<br />
| Y<br />
| <br />
| N<br />
|-<br />
| '''hole_birth'''<br />
| Y<br />
| Y<br />
| N<br />
| Y<br />
|-<br />
| '''large_blocks'''<br />
| Y<br />
| C<br />
| <br />
| N<br />
|-<br />
| '''lz4_compress'''<br />
| Y<br />
| Y<br />
| Y<br />
| Y<br />
|-<br />
| '''multi_vdev_crash_dump'''<br />
| Y<br />
| Y<br />
| N<br />
| N<br />
|-<br />
| '''spacemap_histogram'''<br />
| Y<br />
| Y<br />
| N<br />
| Y<br />
|}<br />
<br />
'''Table legends'''<br />
<br />
FreeBSD: <br />
* N = not implemented<br />
* C = implemented in -CURRENT<br />
* S = implemented in -CURRENT and -STABLE<br />
* Y = implemented in -RELEASE<br />
<br />
Other distributions: <br />
* N = not implemented<br />
* Y = implemented<br />
<br />
For greatest compatibility, features that are exclusive (when enabled) should be periodically ported to all other distributions.<br />
<br />
=== Background ===<br />
<br />
Originally the ZFS on-disk format was versioned with a single number that was increased whenever a new on-disk format change was introduced. This worked well when a single entity controlled the development of ZFS; however, in the more distributed development model of OpenZFS a single version number is not ideal. Every OpenZFS implementation would need to agree on every change to the on-disk format.<br />
<br />
One of the first OpenZFS projects was a new versioning system called "feature flags" that tags on-disk format changes with unique names. The system supports both completely independent format changes, as well as format changes that depend on each other. A pool's on-disk format is portable between OpenZFS implementations as long as all of the feature flags in use by the pool are supported by both implementations.<br />
<br />
For more details see these [http://blog.delphix.com/csiden/files/2012/01/ZFS_Feature_Flags.pdf slides (Jan 2012)] and [http://illumos.org/man/5/zpool-features <tt>zpool-features(5)</tt>] (illumos) or [http://www.freebsd.org/cgi/man.cgi?query=zpool-features&sektion=7&manpath=FreeBSD+11-current <tt>zpool-features(7)</tt>] (FreeBSD).<br />
<br />
== libzfs_core ==<br />
<br />
See this [http://blog.delphix.com/matt/2012/01/17/the-future-of-libzfs/ blog post (Jan 2012)] and associated [http://blog.delphix.com/matt/files/2012/01/The_Future_of_LibZFS.pdf slides] and [http://www.youtube.com/watch?feature=player_embedded&list=PL1A94C8EECCAF7340&v=iJ0S91ygErE video] for more details.<br />
<br />
First introduced in:<br />
{| class="wikitable"<br />
|-<br />
|'''illumos'''<br />
|[https://github.com/illumos/illumos-gate/commit/4445fffbbb1ea25fd0e9ea68b9380dd7a6709025 June 2012]<br />
|-<br />
|'''FreeBSD'''<br />
|[https://github.com/freebsd/freebsd/commit/f1985e5cd725ff1816cd4afbdee2d95b661883f0 March 2013]<br />
|-<br />
|'''ZFS on Linux'''<br />
|[https://github.com/zfsonlinux/zfs/commit/6f1ffb06655008c9b519108ed29fbf03acd6e5de August 2013]<br />
|-<br />
|'''OpenZFS on OS X'''<br />
|[https://github.com/openzfsonosx/zfs/commit/50b0b2d9ea604d29ed729be8fa61bb77ae3ff4e9 October 2013]<br />
|}<br />
<br />
== CLI Usability ==<br />
<br />
These are improvements to the command line interface. While the end result is a generally more friendly user interface, getting the desired behavior often required modifications to the core of ZFS.<br />
<br />
''Listed in chronological order (oldest first).''<br />
<br />
==== Pool Comment ====<br />
<br />
OpenZFS has a per-pool comment property which can be set with the <tt>zpool set</tt> command and can be read even if the pool is not imported, so it is accessible even if pool import fails.<br />
<br />
{| class="wikitable"<br />
|-<br />
|'''illumos'''<br />
|[https://github.com/illumos/illumos-gate/commit/8704186e373c9ed74daa395ff3f7fd745396df9e Nov 2011]<br />
|-<br />
|'''FreeBSD'''<br />
|[https://github.com/freebsd/freebsd/commit/73cab7197174153a718dedc97ff344341bcf6098 Nov 2011]<br />
|-<br />
|'''ZFS on Linux'''<br />
|[https://github.com/zfsonlinux/zfs/commit/d96eb2b1538db13ee7a716ec0e1162f5735edc12 Aug 2012]<br />
|-<br />
|'''OpenZFS on OS X'''<br />
|[https://github.com/openzfsonosx/zfs/commit/d96eb2b1538db13ee7a716ec0e1162f5735edc12 Aug 2012]<br />
|}<br />
<br />
==== Size Estimates for <tt>zfs send</tt> and <tt>zfs destroy</tt> ====<br />
<br />
This feature enhances OpenZFS's internal space accounting information. This new accounting information is used to provide a <tt>-n</tt> (dry-run) option for <tt>zfs send</tt> which can instantly calculate the amount of send stream data a specific <tt>zfs send</tt> command would generate. It is also used for a <tt>-n</tt> option for <tt>zfs destroy</tt> which can instantly calculate the amount of space that would be reclaimed by a specific <tt>zfs destroy</tt> command.<br />
<br />
{| class="wikitable"<br />
|-<br />
|'''illumos'''<br />
|[https://github.com/illumos/illumos-gate/commit/e5351341b58845eee9d722bd71543d5a7c26b6cc Nov 2011]<br />
|-<br />
|'''FreeBSD'''<br />
|[https://github.com/freebsd/freebsd/commit/73cab7197174153a718dedc97ff344341bcf6098 Nov 2011]<br />
|-<br />
|'''ZFS on Linux'''<br />
|[https://github.com/zfsonlinux/zfs/commit/330d06f90d143b41b276796526a66a1c1fff046d Jul 2012]<br />
|-<br />
|'''OpenZFS on OS X'''<br />
|[https://github.com/openzfsonosx/zfs/commit/330d06f90d143b41b276796526a66a1c1fff046d Jul 2012]<br />
|}<br />
<br />
==== vdev Information in <tt>zpool list</tt> ====<br />
<br />
OpenZFS adds a <tt>-v</tt> option to the <tt>zpool list</tt> command which shows detailed sizing information about the vdevs in the pool:<br />
<br />
$ zpool list -v<br />
NAME SIZE ALLOC FREE EXPANDSZ CAP DEDUP HEALTH ALTROOT<br />
dcenter 5.24T 3.85T 1.39T - 73% 1.00x ONLINE -<br />
mirror 556G 469G 86.7G -<br />
c2t1d0 - - - -<br />
c2t0d0 - - - -<br />
mirror 556G 493G 63.0G -<br />
c2t3d0 - - - -<br />
c2t2d0 - - - -<br />
mirror 556G 493G 62.7G -<br />
c2t5d0 - - - -<br />
c2t4d0 - - - -<br />
mirror 556G 494G 62.5G -<br />
c2t8d0 - - - -<br />
c2t6d0 - - - -<br />
mirror 556G 494G 62.2G -<br />
c2t10d0 - - - -<br />
c2t9d0 - - - -<br />
mirror 556G 494G 61.9G -<br />
c2t12d0 - - - -<br />
c2t11d0 - - - -<br />
mirror 1016G 507G 509G -<br />
c1t1d0 - - - -<br />
c1t5d0 - - - -<br />
mirror 1016G 496G 520G -<br />
c1t3d0 - - - -<br />
c1t4d0 - - - -<br />
<br />
{| class="wikitable"<br />
|-<br />
|'''illumos'''<br />
|[https://github.com/illumos/illumos-gate/commit/4263d13f00c9691fa14620eff82abef795be0693 Jan 2012]<br />
|-<br />
|'''FreeBSD'''<br />
|[https://github.com/freebsd/freebsd/commit/38ef930079cbb1df5de9df3c1064426dba3976b1 May 2012]<br />
|-<br />
|'''ZFS on Linux'''<br />
|[https://github.com/zfsonlinux/zfs/commit/1bd201e70d57464fd26bf9089ea4b44fd49e4f2d Sept 2012]<br />
|-<br />
|'''OpenZFS on OS X'''<br />
|[https://github.com/openzfsonosx/zfs/commit/1bd201e70d57464fd26bf9089ea4b44fd49e4f2d Sept 2012]<br />
|}<br />
<br />
==== ZFS list snapshot property alias ====<br />
<br />
Functionally identical to Solaris 11 extension <code>zfs list -t snap</code>.<br />
<br />
{| class="wikitable"<br />
|-<br />
|'''illumos'''<br />
|not yet<br />
|-<br />
|'''FreeBSD'''<br />
|[http://svnweb.freebsd.org/changeset/base/256999 Oct 2013]<br />
|-<br />
|'''ZFS on Linux'''<br />
|[https://github.com/zfsonlinux/zfs/commit/cf81b00a73fe47fdb21586ac1cc179b734540973 Apr 2012]<br />
|-<br />
|'''OpenZFS on OS X'''<br />
|[https://github.com/openzfsonosx/zfs/commit/cf81b00a73fe47fdb21586ac1cc179b734540973 Apr 2012]<br />
|}<br />
<br />
==== ZFS snapshot alias ====<br />
<br />
Functionally identical to Solaris 11 extension <code>zfs snap</code>.<br />
<br />
{| class="wikitable"<br />
|-<br />
|'''illumos'''<br />
|not yet<br />
|-<br />
|'''FreeBSD'''<br />
|[http://svnweb.freebsd.org/changeset/base/256999 Oct 2013]<br />
|-<br />
|'''ZFS on Linux'''<br />
|[https://github.com/zfsonlinux/zfs/commit/10b75496bb0cb7a7b8146c263164adc37f1d176a Apr 2012]<br />
|-<br />
|'''OpenZFS on OS X'''<br />
|[https://github.com/openzfsonosx/zfs/commit/10b75496bb0cb7a7b8146c263164adc37f1d176a Apr 2012]<br />
|}<br />
<br />
==== <tt>zfs send</tt> Progress Reporting ====<br />
<br />
OpenZFS introduces a <tt>-v</tt> option to <tt>zfs send</tt> which reports per-second information on how much data has been sent, how long it has taken, and how much data remains to be sent.<br />
<br />
{| class="wikitable"<br />
|-<br />
|'''illumos'''<br />
|[https://github.com/illumos/illumos-gate/commit/4e3c9f4489a18514e5e8caeb91d4e6db07c98415 May 2012]<br />
|-<br />
|'''FreeBSD'''<br />
|[https://github.com/freebsd/freebsd/commit/046ff8962602e8d65b6b3fae48573513ab7e433f May 2012]<br />
|-<br />
|'''ZFS on Linux'''<br />
|[https://github.com/zfsonlinux/zfs/commit/37abac6d559a1da8ab8e5379442f491b73998f6a Sept 2012]<br />
|-<br />
|'''OpenZFS on OS X'''<br />
|[https://github.com/openzfsonosx/zfs/commit/37abac6d559a1da8ab8e5379442f491b73998f6a Sept 2012]<br />
|}<br />
<br />
==== Arbitrary Snapshot Arguments to <tt>zfs snapshot</tt> ====<br />
<br />
{| class="wikitable"<br />
|-<br />
|'''illumos'''<br />
|[https://github.com/illumos/illumos-gate/commit/4445fffbbb1ea25fd0e9ea68b9380dd7a6709025 June 2012]<br />
|-<br />
|'''FreeBSD'''<br />
|[https://github.com/freebsd/freebsd/commit/f1985e5cd725ff1816cd4afbdee2d95b661883f0 March 2013]<br />
|-<br />
|'''ZFS on Linux'''<br />
|[https://github.com/zfsonlinux/zfs/commit/6f1ffb06655008c9b519108ed29fbf03acd6e5de August 2013]<br />
|-<br />
|'''OpenZFS on OS X'''<br />
|[https://github.com/openzfsonosx/zfs/commit/6f1ffb06655008c9b519108ed29fbf03acd6e5de September 2013]<br />
|}<br />
<br />
== Performance ==<br />
<br />
These are significant performance improvements, often requiring substantial restructuring of the source code.<br />
<br />
''Listed in chronological order (oldest first).''<br />
<br />
==== SA based xattrs ====<br />
<br />
Improves performance of linux-style (short) xattrs by storing them in the dnode_phys_t's bonus block. (Not to be confused with [http://en.wikipedia.org/wiki/Extended_file_attributes#Solaris Solaris-style Extended Attributes] which are full-fledged files or "forks", like NTFS streams. This work could be extended to also improve the performance on illumos of small Extended Attributes whose permissions are the same as the containing file.)<br />
<br />
Requires a disk format change and is off by default until Filesystem (ZPL) Feature Flags are implemented (not to be confused with [[Features#Feature_Flags_Overview | zpool Feature Flags]]).<br />
<br />
{| class="wikitable"<br />
|-<br />
|'''illumos'''<br />
|not yet (needs additional functionality)<br />
|-<br />
|'''FreeBSD'''<br />
|??<br />
|-<br />
|'''ZFS on Linux'''<br />
|[https://github.com/zfsonlinux/zfs/commit/82a37189aac955c81a59a5ecc3400475adb56355 Oct 2011]<br />
|-<br />
|'''OpenZFS on OS X'''<br />
|??<br />
|}<br />
<br />
Note that SA based xattrs are [https://github.com/zfsonlinux/zfs/commit/6a7c0ccca44ad02c476a111d8f7911fc8b12fff7 no longer used on symlinks] as of Aug 2013 until an issue is resolved.<br />
<br />
==== Use the slog even with logbias=throughput ====<br />
<br />
{| class="wikitable"<br />
|-<br />
|'''illumos'''<br />
|??<br />
|-<br />
|'''FreeBSD'''<br />
|??<br />
|-<br />
|'''ZFS on Linux'''<br />
|[https://github.com/zfsonlinux/zfs/commit/5d7a86d114c2706a8d14d94b71f81ad5cdf066c5 Oct 2011]<br />
|-<br />
|'''OpenZFS on OS X'''<br />
|[https://github.com/openzfsonosx/zfs/commit/5d7a86d114c2706a8d14d94b71f81ad5cdf066c5 Oct 2011]<br />
|}<br />
<br />
==== Asynchronous Filesystem and Volume Destruction ====<br />
<br />
Destroying a filesystem requires traversing all of its data in order to return its used blocks to the pool's free list. Before this feature the filesystem was not fully removed until all blocks had been reclaimed. If the destroy operation was interrupted by a reboot or power outage the next attempt to import the pool (probably during boot) would need to complete the destroy operation synchronously, possibly delaying a boot for long periods of time.<br />
<br />
With asynchronous destruction the filesystem's data is immediately moved to a "to be freed" list, allowing the destroy operation to complete without traversing any of the filesystem's data. A background process reclaims blocks from this "to be freed" list and is capable of resuming this process after reboots without slowing the pool import process.<br />
<br />
The new freeing algorithm also has a significant performance improvement when destroying clones. The old algorithm took time proportional to the number of blocks ''referenced'' by the clone, even if most of those blocks could not be reclaimed because they were still referenced by the clone's origin. The new algorithm only takes time proportional to the number of blocks unique to the clone.<br />
<br />
See this [http://blog.delphix.com/matt/2012/07/11/performance-of-zfs-destroy/ blog post] for more detailed performance analysis.<br />
<br />
Note: The <tt>async_destroy</tt> feature flag must be enabled to take advantage of this.<br />
<br />
{| class="wikitable"<br />
|-<br />
|'''illumos'''<br />
|[https://github.com/illumos/illumos-gate/commit/ad135b5d644628e791c3188a6ecbd9c257961ef8 May 2012]<br />
|-<br />
|'''FreeBSD'''<br />
|[https://github.com/freebsd/freebsd/commit/cc61ab2f133566dca51970d44cc49a4355039b5d June 2012]<br />
|-<br />
|'''ZFS on Linux'''<br />
|[https://github.com/zfsonlinux/zfs/commit/9ae529ec5dbdc828ff8326beae58062971d74b2e Jan 2013]<br />
|-<br />
|'''OpenZFS on OS X'''<br />
|[https://github.com/openzfsonosx/zfs/commit/9ae529ec5dbdc828ff8326beae58062971d74b2e Jan 2013]<br />
|}<br />
<br />
==== Reduce Number of Empty bpobjs ====<br />
<br />
Every time OpenZFS takes a snapshot it creates on-disk block pointer objects (bpobj's) to track blocks associated with that snapshot. In common use cases most of these bpobj's are empty, but the number of bpobjs per-snapshot is proportional to the number of snapshots already taken of the same filesystem or volume. When a single filesystem or volume has many (tens of thousands) snapshots these unecessary empty bpobjs can waste space and cause performance problems. OpenZFS waits to create each bpobjs until the first entry is added to it, thus eliminating the empty bpobjs.<br />
<br />
Note: The <tt>empty_bpobj</tt> feature flag must be enabled to take advantage of this.<br />
<br />
{| class="wikitable"<br />
|-<br />
|'''illumos'''<br />
|[https://github.com/illumos/illumos-gate/commit/f17457368189aa911f774c38c1f21875a568bdca Aug 2012]<br />
|-<br />
|'''FreeBSD'''<br />
|[https://github.com/freebsd/freebsd/commit/d9fa2f486ee98b2557e1d5ad5f1af418c663cfc8 Aug 2012]<br />
|-<br />
|'''ZFS on Linux'''<br />
|[https://github.com/zfsonlinux/zfs/commit/753c38392ddff9d3cf140bb4d28f3bfba52c92d2 Dec 2012]<br />
|-<br />
|'''OpenZFS on OS X'''<br />
|[https://github.com/openzfsonosx/zfs/commit/753c38392ddff9d3cf140bb4d28f3bfba52c92d2 Dec 2012]<br />
|}<br />
<br />
==== Single Copy ARC ====<br />
<br />
OpenZFS caches disk blocks in-memory in the adaptive replacement cache (ARC). Originally when the same disk block was accessed from different clones it was cached multiple times (one for each clone accessing the block) in case a clone planned to modify the block. With these changes OpenZFS caches at most one copy of every block unless a clone is actually modifying the block.<br />
<br />
{| class="wikitable"<br />
|-<br />
|'''illumos'''<br />
|[https://github.com/illumos/illumos-gate/commit/9253d63df408bb48584e0b1abfcc24ef2472382e Sep 2012]<br />
|-<br />
|'''FreeBSD'''<br />
|[https://github.com/freebsd/freebsd/commit/8e1fdec2c76a948b16ebf8e4abe2cb73a60d3477 Nov 2012]<br />
|-<br />
|'''ZFS on Linux'''<br />
|[https://github.com/zfsonlinux/zfs/commit/1eb5bfa3dcdaecb19543d9df13131374a7a42947 Dec 2012]<br />
|-<br />
|'''OpenZFS on OS X'''<br />
|[https://github.com/openzfsonosx/zfs/commit/1eb5bfa3dcdaecb19543d9df13131374a7a42947 Dec 2012]<br />
|}<br />
<br />
==== TRIM Support ====<br />
<br />
TRIM support provides the ability to pass deletes / frees through to underlying vdevs that help to ensure devices such as SSD's, which rely on receiving TRIM / UNMAP requests for sectors which are no longer needed, maintain optimal performance.<br />
<br />
The current FreeBSD implementation builds a map of regions that were freed. On every write the<br />
code consults the map and removes ranges that were freed before, but are now overwritten.<br />
<br />
Freed blocks are not TRIMed immediately, there is a low priority thread that TRIMs ranges when the time comes.<br />
<br />
Support for TRIM has been demonstrated to significantly improved the general performance of SSD in the field, eliminating the need for regular secure erase cycles on busy hosts.<br />
<br />
An alternative method, which is arguably better, and works by tracking the metaslab allocator is also in progress and can be found here:<br />
[http://cr.illumos.org/~webrev/skiselkov/zfs_unmap/ ZFS TRIM Support for illumos]<br />
<br />
There is [https://github.com/zfsonlinux/zfs/pull/1016 a pull request for ZFS On Linux] which implements FreeBSD's (Sep 2012) ZFS TRIM support.<br />
<br />
{| class="wikitable"<br />
|-<br />
|'''illumos'''<br />
|not yet ported<br />
|-<br />
|'''FreeBSD'''<br />
|[http://svnweb.freebsd.org/base?view=revision&sortby=file&revision=240868 Sep 2012]<br />
|-<br />
|'''ZFS on Linux'''<br />
|not yet ported<br />
|-<br />
|'''OpenZFS on OS X'''<br />
|not yet ported<br />
|}<br />
<br />
==== FASTWRITE Algorithm ====<br />
<br />
Improves synchronous IO performance.<br />
<br />
{| class="wikitable"<br />
|-<br />
|'''illumos'''<br />
|not yet ported<br />
|-<br />
|'''FreeBSD'''<br />
|not yet ported<br />
|-<br />
|'''ZFS on Linux'''<br />
|[https://github.com/zfsonlinux/zfs/commit/920dd524fb2997225d4b1ac180bcbc14b045fda6 Oct 2012]<br />
|-<br />
|'''OpenZFS on OS X'''<br />
|[https://github.com/openzfsonosx/zfs/commit/920dd524fb2997225d4b1ac180bcbc14b045fda6 Oct 2012]<br />
|}<br />
<br />
Note that a [https://github.com/ryao/zfs/commit/858822a04b4563657b2267131e90d9687d67e31b locking enhancement] is being reviewed.<br />
<br />
==== Block Freeing Performance Improvments ====<br />
<br />
Performance analysis of OpenZFS revealed that the algorithms used when freeing blocks could cause significant performance problems when freeing a large amount of blocks in a single transaction or when dealing with fragmented pools. Several performance improvements were made in this area.<br />
<br />
{| class="wikitable"<br />
|-<br />
|'''illumos'''<br />
|[https://github.com/illumos/illumos-gate/commit/01f55e48fb4d524eaf70687728aa51b7762e2e97 Nov 2012]<br />
|[https://github.com/illumos/illumos-gate/commit/16a4a8074274d2d7cc408589cf6359f4a378c861 Feb 2013]<br />
|[https://github.com/illumos/illumos-gate/commit/9eb57f7f3fbb970d4b9b89dcd5ecf543fe2414d5 Feb 2013]<br />
|-<br />
|'''FreeBSD'''<br />
|[https://github.com/freebsd/freebsd/commit/5d9b3f284b13ac492326e05f6ba4c00e98adf05c Nov 2012]<br />
|[https://github.com/freebsd/freebsd/commit/18e9a0422b52091035dae9d69bde9dd571a8ff7e Feb 2013]<br />
|[https://github.com/freebsd/freebsd/commit/18e9a0422b52091035dae9d69bde9dd571a8ff7e Feb 2013]<br />
|-<br />
|'''ZFS on Linux'''<br />
|[https://github.com/zfsonlinux/zfs/commit/55d85d5a8c45c4559a4a0e675c37b0c3afb19c2f May 2013]<br />
|[https://github.com/zfsonlinux/zfs/commit/e51be06697762215dc3b679f8668987034a5a048 June 2013]<br />
|not yet<br />
|-<br />
|'''OpenZFS on OS X'''<br />
|[https://github.com/openzfsonosx/zfs/commit/55d85d5a8c45c4559a4a0e675c37b0c3afb19c2f May 2013]<br />
|[https://github.com/openzfsonosx/zfs/commit/e51be06697762215dc3b679f8668987034a5a048 June 2013]<br />
|not yet<br />
|}<br />
<br />
==== nop-write ====<br />
<br />
ZFS supports end-to-end checksumming of every data block. When a cryptographically secure checksum is being used OpenZFS will compare the checksums of incoming writes to checksum of the existing on-disk data and avoid issuing any write i/o for data that has not changed. This can help performance and snapshot space usage in situations were the same files are regularly overwritten with almost-identical data (e.g. regular full-backups of large random-access files).<br />
<br />
{| class="wikitable"<br />
|-<br />
|'''illumos'''<br />
|[https://github.com/illumos/illumos-gate/commit/80901aea8e78a2c20751f61f01bebd1d5b5c2ba5 Nov 2012]<br />
|-<br />
|'''FreeBSD'''<br />
|[https://github.com/freebsd/freebsd/commit/3a0bfecf052237768517963f169d0797e2978f59 Nov 2012]<br />
|-<br />
|'''ZFS on Linux'''<br />
|[https://github.com/zfsonlinux/zfs/commit/03c6040bee6c87a9413b7da41d9f580f79a8ab62 Nov 2013]<br />
|-<br />
|'''OpenZFS on OS X'''<br />
|not yet<br />
|}<br />
<br />
==== lz4 compression ====<br />
<br />
OpenZFS supports on-the-fly compression of all user data with a variety of compression algorithm. This feature adds support for the lz4 compression algorithm. lz4 is usually faster and compresses data better than lzjb, the old default OpenZFS compression algorithm.<br />
<br />
Note: The <tt>lz4_compress</tt> feature flag must be enabled to take advantage of this.<br />
<br />
{| class="wikitable"<br />
|-<br />
|'''illumos'''<br />
|[https://github.com/illumos/illumos-gate/commit/a6f561b4aee75d0d028e7b36b151c8ed8a86bc76 Jan 2013]<br />
|-<br />
|'''FreeBSD'''<br />
|[https://github.com/freebsd/freebsd/commit/c6d9dc1ad2d2e36220845b84a2d180bd97354797 Feb 2013]<br />
|-<br />
|'''ZFS on Linux'''<br />
|[https://github.com/zfsonlinux/zfs/commit/9759c60f1a1503e48dc5c45a209c3edd5758319f Jan 2013]<br />
|-<br />
|'''OpenZFS on OS X'''<br />
|[https://github.com/openzfsonosx/zfs/commit/9759c60f1a1503e48dc5c45a209c3edd5758319f Jan 2013]<br />
|}<br />
<br />
==== synctask rewrite ====<br />
<br />
{| class="wikitable"<br />
|-<br />
|'''illumos'''<br />
|[https://github.com/illumos/illumos-gate/commit/3b2aab18808792cbd248a12f1edf139b89833c13 Feb 2013]<br />
|-<br />
|'''FreeBSD'''<br />
|[https://github.com/freebsd/freebsd/commit/f1985e5cd725ff1816cd4afbdee2d95b661883f0 March 2013]<br />
|-<br />
|'''ZFS on Linux'''<br />
|[https://github.com/zfsonlinux/zfs/commit/13fe019870c8779bf2f5b3ff731b512cf89133ef Sept 2013]<br />
|-<br />
|'''OpenZFS on OS X'''<br />
|[https://github.com/openzfsonosx/zfs/commit/13fe019870c8779bf2f5b3ff731b512cf89133ef Sept 2013]<br />
|}<br />
<br />
==== l2arc compression ====<br />
<br />
{| class="wikitable"<br />
|-<br />
|'''illumos'''<br />
|[https://github.com/illumos/illumos-gate/commit/aad02571bc59671aa3103bb070ae365f531b0b62 Jun 2013]<br />
|-<br />
|'''FreeBSD'''<br />
|[https://github.com/freebsd/freebsd/commit/b20363fe596a7e3a55d5b62f4d3fdb482c65c47a Jun 2013]<br />
|-<br />
|'''ZFS on Linux'''<br />
|[https://github.com/zfsonlinux/zfs/commit/3a17a7a99a1a6332d0999f9be68e2b8dc3933de1 Aug 2013]<br />
|-<br />
|'''OpenZFS on OS X'''<br />
|[https://github.com/openzfsonosx/zfs/commit/3a17a7a99a1a6332d0999f9be68e2b8dc3933de1 Aug 2013]<br />
|}<br />
<br />
==== ARC Shouldn't Cache Freed Blocks ====<br />
<br />
Originally cached blocks in the ARC remained cached until they were evicted due to memory pressure, even if the underlying disk block was freed. In some workloads these freed blocks were so frequently accessed before they were freed that the ARC continued to cache them while evicting blocks which had not been freed yet. Since freed blocks could never be accessed again continuing to cache them was unnecessary. In OpenZFS ARC blocks are evicted immediately when their underlying data blocks are freed.<br />
<br />
{| class="wikitable"<br />
|-<br />
|'''illumos'''<br />
|[https://github.com/illumos/illumos-gate/commit/6e6d5868f52089b9026785bd90257a3d3f6e5ee2 Jun 2013]<br />
|-<br />
|'''FreeBSD'''<br />
|[https://github.com/freebsd/freebsd/commit/13d822743426263ee50bcf047ab41a1e386156a8 Jun 2013]<br />
|-<br />
|'''ZFS on Linux'''<br />
|[https://github.com/zfsonlinux/zfs/commit/df4474f92d0b1b8d54e1914fdd56be2b75f1ff5e Jun 2013]<br />
|-<br />
|'''OpenZFS on OS X'''<br />
|[https://github.com/openzfsonosx/zfs/commit/df4474f92d0b1b8d54e1914fdd56be2b75f1ff5e Jun 2013]<br />
|}<br />
<br />
==== Improve N-way mirror read performance ====<br />
<br />
Queues read requests to least busy leaf vdev in mirrors.<br />
<br />
In addition to the vdev load biasing first implemented by ZFS on Linux in July 2013, the FreeBSD October 2013 version added I/O locality and device rotational information to further enhance the performance.<br />
<br />
{| class="wikitable"<br />
!OS<br />
!Load<br />
!Load + I/O Locality & Rotational Information<br />
|-<br />
|'''illumos'''<br />
|not yet ported<br />
|not yet ported<br />
|-<br />
|'''FreeBSD'''<br />
|N/A<br />
|[http://svnweb.freebsd.org/changeset/base/256956 23rd October 2013]<br />
|-<br />
|'''ZFS on Linux'''<br />
|[https://github.com/zfsonlinux/zfs/commit/556011dbec2d10579819078559a77630fc559112 Jul 2013]<br />
|not yet ported<br />
|-<br />
|'''OpenZFS on OS X'''<br />
|[https://github.com/openzfsonosx/zfs/commit/556011dbec2d10579819078559a77630fc559112 Jul 2013]<br />
|not yet ported<br />
|}<br />
<br />
==== Smoother Write Throttle ====<br />
<br />
The write throttle (dsl_pool_tempreserve_space() and txg_constrain_throughput()) is rewritten to produce much more consistent delays when under constant load. The new write throttle is based on the amount of dirty data, rather than guesses about future performance of the system. When there is a lot of dirty data, each transaction (e.g. write() syscall) will be delayed by the same small amount. This eliminates the "brick wall of wait" that the old write throttle could hit, causing all transactions to wait several seconds until the next txg opens. One of the keys to the new write throttle is decrementing the amount of dirty data as i/o completes, rather than at the end of spa_sync(). Note that the write throttle is only applied once the i/o scheduler is issuing the maximum number of outstanding async writes. See the block comments in dsl_pool.c and above dmu_tx_delay() for more details.<br />
<br />
The ZFS i/o scheduler (vdev_queue.c) now divides i/os into 5 classes: sync read, sync write, async read, async write, and scrub/resilver. The scheduler issues a number of concurrent i/os from each class to the device. Once a class has been selected, an i/o is selected from this class using either an elevator algorithem (async, scrub classes) or FIFO (sync classes). The number of concurrent async write i/os is tuned dynamically based on i/o load, to achieve good sync i/o latency when there is not a high load of writes, and good write throughput when there is. See the block comment in vdev_queue.c for more details.<br />
<br />
{| class="wikitable"<br />
|-<br />
|'''illumos'''<br />
|[https://github.com/illumos/illumos-gate/commit/69962b5647e4a8b9b14998733b765925381b727e Aug 2013]<br />
|-<br />
|'''FreeBSD'''<br />
|[http://svnweb.freebsd.org/changeset/base/258632 Nov 2013]<br />
|-<br />
|'''ZFS on Linux'''<br />
|[https://github.com/zfsonlinux/zfs/commit/e8b96c6007bf97cdf34869c1ffbd0ce753873a3d Dec 2013]<br />
|-<br />
|'''OpenZFS on OS X'''<br />
|not yet<br />
|}<br />
<br />
== Dataset Properties ==<br />
<br />
These are new filesystem, volume, and snapshot properties which can be accessed with the <tt>zfs(1)</tt> command's <tt>get</tt> subcommand. See the <tt>zfs(1)</tt> manpage for your distribution for more details on each of these properties.<br />
<br />
{| class="wikitable"<br />
!Property<br />
!Description<br />
!illumos<br />
!FreeBSD<br />
!ZFS on Linux<br />
!OpenZFS on OS X<br />
|-<br />
|<tt>refcompressratio</tt><br />
|The compression ratio acheived for all data referenced by (but not necessarily unique to) a snapshot, filesystem, or volume, expressed as a multiplier.<br />
|[https://github.com/illumos/illumos-gate/commit/187d6ac08adc31ea6868bde0cfbbb288826254e8 Jun 2011]<br />
|[https://github.com/freebsd/freebsd/commit/333e34b938a2b5e7b036e02b36408880b415109c Jun 2011]<br />
|[https://github.com/zfsonlinux/zfs/commit/77999e804fff35782ab4b578d2cecf064c54a841 Aug 2012]<br />
|[https://github.com/openzfsonosx/zfs/commit/77999e804fff35782ab4b578d2cecf064c54a841 Aug 2012]<br />
|-<br />
|<tt>clones</tt><br />
|For snapshots, this property is a comma-separated list of filesystems or volumes which are clones of this snapshot.<br />
|[https://github.com/illumos/illumos-gate/commit/e5351341b58845eee9d722bd71543d5a7c26b6cc Nov 2011]<br />
|[https://github.com/freebsd/freebsd/commit/73cab7197174153a718dedc97ff344341bcf6098 Nov 2011]<br />
|[https://github.com/zfsonlinux/zfs/commit/330d06f90d143b41b276796526a66a1c1fff046d Jul 2012]<br />
|[https://github.com/openzfsonosx/zfs/commit/330d06f90d143b41b276796526a66a1c1fff046d Jul 2012]<br />
|-<br />
|<tt>written</tt><br />
|The amount of referenced space written to this dataset since the previous snapshot.<br />
|[https://github.com/illumos/illumos-gate/commit/e5351341b58845eee9d722bd71543d5a7c26b6cc Nov 2011]<br />
|[https://github.com/freebsd/freebsd/commit/73cab7197174153a718dedc97ff344341bcf6098 Nov 2011]<br />
|[https://github.com/zfsonlinux/zfs/commit/330d06f90d143b41b276796526a66a1c1fff046d Jul 2012]<br />
|[https://github.com/openzfsonosx/zfs/commit/330d06f90d143b41b276796526a66a1c1fff046d Jul 2012]<br />
|-<br />
|<tt>written@''<snap>''</tt><br />
|The amount of referenced space written to this dataset since the specified snapshot. This is the space referenced by this dataset, but not referenced by the specified snapshot.<br />
|[https://github.com/illumos/illumos-gate/commit/e5351341b58845eee9d722bd71543d5a7c26b6cc Nov 2011]<br />
|[https://github.com/freebsd/freebsd/commit/73cab7197174153a718dedc97ff344341bcf6098 Nov 2011]<br />
|[https://github.com/zfsonlinux/zfs/commit/330d06f90d143b41b276796526a66a1c1fff046d Jul 2012]<br />
|[https://github.com/openzfsonosx/zfs/commit/330d06f90d143b41b276796526a66a1c1fff046d Jul 2012]<br />
|-<br />
|<tt>logicalused</tt>, <tt>logicalreferenced</tt><br />
|The amount of space used or referenced, before taking into account compression.<br />
|[https://github.com/illumos/illumos-gate/commit/77372cb0f35e8d3615ca2e16044f033397e88e21 Feb 2013]<br />
|[https://github.com/freebsd/freebsd/commit/2bed8f5691b7572d6f31bfc68e9f762a938af863 Mar 2013]<br />
|not yet<br />
|not yet<br />
|-<br />
|}</div>Grahamperrinhttps://openzfs.org/w/index.php?title=Features&diff=1665Features2015-02-12T05:02:43Z<p>Grahamperrin: wrong column in my previous edit</p>
<hr />
<div>This page describes some of the more important features and performance improvements that are part of OpenZFS.<br />
<br />
Help would be appreciated in porting features between platforms whose status is "not yet".<br />
<br />
== Feature Flags ==<br />
<br />
{| class="wikitable"<br />
|<br />
| '''illumos'''<br />
| '''FreeBSD'''<br />
| '''ZFS on Linux'''<br />
| '''OpenZFS on OS X'''<br />
|-<br />
| '''async_destroy'''<br />
| Y<br />
| Y<br />
| Y<br />
| Y<br />
|-<br />
| '''bookmarks'''<br />
| Y<br />
| S<br />
| N<br />
| Y<br />
|-<br />
| '''embedded_data'''<br />
| Y<br />
| C<br />
| <br />
| Y<br />
|-<br />
| '''empty_bpobj'''<br />
| Y<br />
| Y<br />
| Y<br />
| Y<br />
|-<br />
| '''enabled_txg'''<br />
| Y<br />
| S<br />
| N<br />
| Y<br />
|-<br />
| '''extensible_dataset'''<br />
| Y<br />
| S<br />
| N<br />
| Y<br />
|-<br />
| '''filesystem_limits'''<br />
| Y<br />
| C<br />
| <br />
| N<br />
|-<br />
| '''hole_birth'''<br />
| Y<br />
| S<br />
| N<br />
| Y<br />
|-<br />
| '''large_blocks'''<br />
| Y<br />
| C<br />
| <br />
| N<br />
|-<br />
| '''lz4_compress'''<br />
| Y<br />
| Y<br />
| Y<br />
| Y<br />
|-<br />
| '''multi_vdev_crash_dump'''<br />
| Y<br />
| S<br />
| N<br />
| N<br />
|-<br />
| '''spacemap_histogram'''<br />
| Y<br />
| S<br />
| N<br />
| Y<br />
|}<br />
<br />
'''Table legends'''<br />
<br />
FreeBSD: <br />
* N = not implemented<br />
* C = implemented in -CURRENT<br />
* S = implemented in -CURRENT and -STABLE<br />
* Y = implemented in -RELEASE<br />
<br />
Other distributions: <br />
* N = not implemented<br />
* Y = implemented<br />
<br />
For greatest compatibility, features that are exclusive (when enabled) should be periodically ported to all other distributions.<br />
<br />
=== Background ===<br />
<br />
Originally the ZFS on-disk format was versioned with a single number that was increased whenever a new on-disk format change was introduced. This worked well when a single entity controlled the development of ZFS; however, in the more distributed development model of OpenZFS a single version number is not ideal. Every OpenZFS implementation would need to agree on every change to the on-disk format.<br />
<br />
One of the first OpenZFS projects was a new versioning system called "feature flags" that tags on-disk format changes with unique names. The system supports both completely independent format changes, as well as format changes that depend on each other. A pool's on-disk format is portable between OpenZFS implementations as long as all of the feature flags in use by the pool are supported by both implementations.<br />
<br />
For more details see these [http://blog.delphix.com/csiden/files/2012/01/ZFS_Feature_Flags.pdf slides (Jan 2012)] and [http://illumos.org/man/5/zpool-features <tt>zpool-features(5)</tt>] (illumos) or [http://www.freebsd.org/cgi/man.cgi?query=zpool-features&sektion=7&manpath=FreeBSD+11-current <tt>zpool-features(7)</tt>] (FreeBSD).<br />
<br />
== libzfs_core ==<br />
<br />
See this [http://blog.delphix.com/matt/2012/01/17/the-future-of-libzfs/ blog post (Jan 2012)] and associated [http://blog.delphix.com/matt/files/2012/01/The_Future_of_LibZFS.pdf slides] and [http://www.youtube.com/watch?feature=player_embedded&list=PL1A94C8EECCAF7340&v=iJ0S91ygErE video] for more details.<br />
<br />
First introduced in:<br />
{| class="wikitable"<br />
|-<br />
|'''illumos'''<br />
|[https://github.com/illumos/illumos-gate/commit/4445fffbbb1ea25fd0e9ea68b9380dd7a6709025 June 2012]<br />
|-<br />
|'''FreeBSD'''<br />
|[https://github.com/freebsd/freebsd/commit/f1985e5cd725ff1816cd4afbdee2d95b661883f0 March 2013]<br />
|-<br />
|'''ZFS on Linux'''<br />
|[https://github.com/zfsonlinux/zfs/commit/6f1ffb06655008c9b519108ed29fbf03acd6e5de August 2013]<br />
|-<br />
|'''OpenZFS on OS X'''<br />
|[https://github.com/openzfsonosx/zfs/commit/50b0b2d9ea604d29ed729be8fa61bb77ae3ff4e9 October 2013]<br />
|}<br />
<br />
== CLI Usability ==<br />
<br />
These are improvements to the command line interface. While the end result is a generally more friendly user interface, getting the desired behavior often required modifications to the core of ZFS.<br />
<br />
''Listed in chronological order (oldest first).''<br />
<br />
==== Pool Comment ====<br />
<br />
OpenZFS has a per-pool comment property which can be set with the <tt>zpool set</tt> command and can be read even if the pool is not imported, so it is accessible even if pool import fails.<br />
<br />
{| class="wikitable"<br />
|-<br />
|'''illumos'''<br />
|[https://github.com/illumos/illumos-gate/commit/8704186e373c9ed74daa395ff3f7fd745396df9e Nov 2011]<br />
|-<br />
|'''FreeBSD'''<br />
|[https://github.com/freebsd/freebsd/commit/73cab7197174153a718dedc97ff344341bcf6098 Nov 2011]<br />
|-<br />
|'''ZFS on Linux'''<br />
|[https://github.com/zfsonlinux/zfs/commit/d96eb2b1538db13ee7a716ec0e1162f5735edc12 Aug 2012]<br />
|-<br />
|'''OpenZFS on OS X'''<br />
|[https://github.com/openzfsonosx/zfs/commit/d96eb2b1538db13ee7a716ec0e1162f5735edc12 Aug 2012]<br />
|}<br />
<br />
==== Size Estimates for <tt>zfs send</tt> and <tt>zfs destroy</tt> ====<br />
<br />
This feature enhances OpenZFS's internal space accounting information. This new accounting information is used to provide a <tt>-n</tt> (dry-run) option for <tt>zfs send</tt> which can instantly calculate the amount of send stream data a specific <tt>zfs send</tt> command would generate. It is also used for a <tt>-n</tt> option for <tt>zfs destroy</tt> which can instantly calculate the amount of space that would be reclaimed by a specific <tt>zfs destroy</tt> command.<br />
<br />
{| class="wikitable"<br />
|-<br />
|'''illumos'''<br />
|[https://github.com/illumos/illumos-gate/commit/e5351341b58845eee9d722bd71543d5a7c26b6cc Nov 2011]<br />
|-<br />
|'''FreeBSD'''<br />
|[https://github.com/freebsd/freebsd/commit/73cab7197174153a718dedc97ff344341bcf6098 Nov 2011]<br />
|-<br />
|'''ZFS on Linux'''<br />
|[https://github.com/zfsonlinux/zfs/commit/330d06f90d143b41b276796526a66a1c1fff046d Jul 2012]<br />
|-<br />
|'''OpenZFS on OS X'''<br />
|[https://github.com/openzfsonosx/zfs/commit/330d06f90d143b41b276796526a66a1c1fff046d Jul 2012]<br />
|}<br />
<br />
==== vdev Information in <tt>zpool list</tt> ====<br />
<br />
OpenZFS adds a <tt>-v</tt> option to the <tt>zpool list</tt> command which shows detailed sizing information about the vdevs in the pool:<br />
<br />
$ zpool list -v<br />
NAME SIZE ALLOC FREE EXPANDSZ CAP DEDUP HEALTH ALTROOT<br />
dcenter 5.24T 3.85T 1.39T - 73% 1.00x ONLINE -<br />
mirror 556G 469G 86.7G -<br />
c2t1d0 - - - -<br />
c2t0d0 - - - -<br />
mirror 556G 493G 63.0G -<br />
c2t3d0 - - - -<br />
c2t2d0 - - - -<br />
mirror 556G 493G 62.7G -<br />
c2t5d0 - - - -<br />
c2t4d0 - - - -<br />
mirror 556G 494G 62.5G -<br />
c2t8d0 - - - -<br />
c2t6d0 - - - -<br />
mirror 556G 494G 62.2G -<br />
c2t10d0 - - - -<br />
c2t9d0 - - - -<br />
mirror 556G 494G 61.9G -<br />
c2t12d0 - - - -<br />
c2t11d0 - - - -<br />
mirror 1016G 507G 509G -<br />
c1t1d0 - - - -<br />
c1t5d0 - - - -<br />
mirror 1016G 496G 520G -<br />
c1t3d0 - - - -<br />
c1t4d0 - - - -<br />
<br />
{| class="wikitable"<br />
|-<br />
|'''illumos'''<br />
|[https://github.com/illumos/illumos-gate/commit/4263d13f00c9691fa14620eff82abef795be0693 Jan 2012]<br />
|-<br />
|'''FreeBSD'''<br />
|[https://github.com/freebsd/freebsd/commit/38ef930079cbb1df5de9df3c1064426dba3976b1 May 2012]<br />
|-<br />
|'''ZFS on Linux'''<br />
|[https://github.com/zfsonlinux/zfs/commit/1bd201e70d57464fd26bf9089ea4b44fd49e4f2d Sept 2012]<br />
|-<br />
|'''OpenZFS on OS X'''<br />
|[https://github.com/openzfsonosx/zfs/commit/1bd201e70d57464fd26bf9089ea4b44fd49e4f2d Sept 2012]<br />
|}<br />
<br />
==== ZFS list snapshot property alias ====<br />
<br />
Functionally identical to Solaris 11 extension <code>zfs list -t snap</code>.<br />
<br />
{| class="wikitable"<br />
|-<br />
|'''illumos'''<br />
|not yet<br />
|-<br />
|'''FreeBSD'''<br />
|[http://svnweb.freebsd.org/changeset/base/256999 Oct 2013]<br />
|-<br />
|'''ZFS on Linux'''<br />
|[https://github.com/zfsonlinux/zfs/commit/cf81b00a73fe47fdb21586ac1cc179b734540973 Apr 2012]<br />
|-<br />
|'''OpenZFS on OS X'''<br />
|[https://github.com/openzfsonosx/zfs/commit/cf81b00a73fe47fdb21586ac1cc179b734540973 Apr 2012]<br />
|}<br />
<br />
==== ZFS snapshot alias ====<br />
<br />
Functionally identical to Solaris 11 extension <code>zfs snap</code>.<br />
<br />
{| class="wikitable"<br />
|-<br />
|'''illumos'''<br />
|not yet<br />
|-<br />
|'''FreeBSD'''<br />
|[http://svnweb.freebsd.org/changeset/base/256999 Oct 2013]<br />
|-<br />
|'''ZFS on Linux'''<br />
|[https://github.com/zfsonlinux/zfs/commit/10b75496bb0cb7a7b8146c263164adc37f1d176a Apr 2012]<br />
|-<br />
|'''OpenZFS on OS X'''<br />
|[https://github.com/openzfsonosx/zfs/commit/10b75496bb0cb7a7b8146c263164adc37f1d176a Apr 2012]<br />
|}<br />
<br />
==== <tt>zfs send</tt> Progress Reporting ====<br />
<br />
OpenZFS introduces a <tt>-v</tt> option to <tt>zfs send</tt> which reports per-second information on how much data has been sent, how long it has taken, and how much data remains to be sent.<br />
<br />
{| class="wikitable"<br />
|-<br />
|'''illumos'''<br />
|[https://github.com/illumos/illumos-gate/commit/4e3c9f4489a18514e5e8caeb91d4e6db07c98415 May 2012]<br />
|-<br />
|'''FreeBSD'''<br />
|[https://github.com/freebsd/freebsd/commit/046ff8962602e8d65b6b3fae48573513ab7e433f May 2012]<br />
|-<br />
|'''ZFS on Linux'''<br />
|[https://github.com/zfsonlinux/zfs/commit/37abac6d559a1da8ab8e5379442f491b73998f6a Sept 2012]<br />
|-<br />
|'''OpenZFS on OS X'''<br />
|[https://github.com/openzfsonosx/zfs/commit/37abac6d559a1da8ab8e5379442f491b73998f6a Sept 2012]<br />
|}<br />
<br />
==== Arbitrary Snapshot Arguments to <tt>zfs snapshot</tt> ====<br />
<br />
{| class="wikitable"<br />
|-<br />
|'''illumos'''<br />
|[https://github.com/illumos/illumos-gate/commit/4445fffbbb1ea25fd0e9ea68b9380dd7a6709025 June 2012]<br />
|-<br />
|'''FreeBSD'''<br />
|[https://github.com/freebsd/freebsd/commit/f1985e5cd725ff1816cd4afbdee2d95b661883f0 March 2013]<br />
|-<br />
|'''ZFS on Linux'''<br />
|[https://github.com/zfsonlinux/zfs/commit/6f1ffb06655008c9b519108ed29fbf03acd6e5de August 2013]<br />
|-<br />
|'''OpenZFS on OS X'''<br />
|[https://github.com/openzfsonosx/zfs/commit/6f1ffb06655008c9b519108ed29fbf03acd6e5de September 2013]<br />
|}<br />
<br />
== Performance ==<br />
<br />
These are significant performance improvements, often requiring substantial restructuring of the source code.<br />
<br />
''Listed in chronological order (oldest first).''<br />
<br />
==== SA based xattrs ====<br />
<br />
Improves performance of linux-style (short) xattrs by storing them in the dnode_phys_t's bonus block. (Not to be confused with [http://en.wikipedia.org/wiki/Extended_file_attributes#Solaris Solaris-style Extended Attributes] which are full-fledged files or "forks", like NTFS streams. This work could be extended to also improve the performance on illumos of small Extended Attributes whose permissions are the same as the containing file.)<br />
<br />
Requires a disk format change and is off by default until Filesystem (ZPL) Feature Flags are implemented (not to be confused with [[Features#Feature_Flags_Overview | zpool Feature Flags]]).<br />
<br />
{| class="wikitable"<br />
|-<br />
|'''illumos'''<br />
|not yet (needs additional functionality)<br />
|-<br />
|'''FreeBSD'''<br />
|??<br />
|-<br />
|'''ZFS on Linux'''<br />
|[https://github.com/zfsonlinux/zfs/commit/82a37189aac955c81a59a5ecc3400475adb56355 Oct 2011]<br />
|-<br />
|'''OpenZFS on OS X'''<br />
|??<br />
|}<br />
<br />
Note that SA based xattrs are [https://github.com/zfsonlinux/zfs/commit/6a7c0ccca44ad02c476a111d8f7911fc8b12fff7 no longer used on symlinks] as of Aug 2013 until an issue is resolved.<br />
<br />
==== Use the slog even with logbias=throughput ====<br />
<br />
{| class="wikitable"<br />
|-<br />
|'''illumos'''<br />
|??<br />
|-<br />
|'''FreeBSD'''<br />
|??<br />
|-<br />
|'''ZFS on Linux'''<br />
|[https://github.com/zfsonlinux/zfs/commit/5d7a86d114c2706a8d14d94b71f81ad5cdf066c5 Oct 2011]<br />
|-<br />
|'''OpenZFS on OS X'''<br />
|[https://github.com/openzfsonosx/zfs/commit/5d7a86d114c2706a8d14d94b71f81ad5cdf066c5 Oct 2011]<br />
|}<br />
<br />
==== Asynchronous Filesystem and Volume Destruction ====<br />
<br />
Destroying a filesystem requires traversing all of its data in order to return its used blocks to the pool's free list. Before this feature the filesystem was not fully removed until all blocks had been reclaimed. If the destroy operation was interrupted by a reboot or power outage the next attempt to import the pool (probably during boot) would need to complete the destroy operation synchronously, possibly delaying a boot for long periods of time.<br />
<br />
With asynchronous destruction the filesystem's data is immediately moved to a "to be freed" list, allowing the destroy operation to complete without traversing any of the filesystem's data. A background process reclaims blocks from this "to be freed" list and is capable of resuming this process after reboots without slowing the pool import process.<br />
<br />
The new freeing algorithm also has a significant performance improvement when destroying clones. The old algorithm took time proportional to the number of blocks ''referenced'' by the clone, even if most of those blocks could not be reclaimed because they were still referenced by the clone's origin. The new algorithm only takes time proportional to the number of blocks unique to the clone.<br />
<br />
See this [http://blog.delphix.com/matt/2012/07/11/performance-of-zfs-destroy/ blog post] for more detailed performance analysis.<br />
<br />
Note: The <tt>async_destroy</tt> feature flag must be enabled to take advantage of this.<br />
<br />
{| class="wikitable"<br />
|-<br />
|'''illumos'''<br />
|[https://github.com/illumos/illumos-gate/commit/ad135b5d644628e791c3188a6ecbd9c257961ef8 May 2012]<br />
|-<br />
|'''FreeBSD'''<br />
|[https://github.com/freebsd/freebsd/commit/cc61ab2f133566dca51970d44cc49a4355039b5d June 2012]<br />
|-<br />
|'''ZFS on Linux'''<br />
|[https://github.com/zfsonlinux/zfs/commit/9ae529ec5dbdc828ff8326beae58062971d74b2e Jan 2013]<br />
|-<br />
|'''OpenZFS on OS X'''<br />
|[https://github.com/openzfsonosx/zfs/commit/9ae529ec5dbdc828ff8326beae58062971d74b2e Jan 2013]<br />
|}<br />
<br />
==== Reduce Number of Empty bpobjs ====<br />
<br />
Every time OpenZFS takes a snapshot it creates on-disk block pointer objects (bpobj's) to track blocks associated with that snapshot. In common use cases most of these bpobj's are empty, but the number of bpobjs per-snapshot is proportional to the number of snapshots already taken of the same filesystem or volume. When a single filesystem or volume has many (tens of thousands) snapshots these unecessary empty bpobjs can waste space and cause performance problems. OpenZFS waits to create each bpobjs until the first entry is added to it, thus eliminating the empty bpobjs.<br />
<br />
Note: The <tt>empty_bpobj</tt> feature flag must be enabled to take advantage of this.<br />
<br />
{| class="wikitable"<br />
|-<br />
|'''illumos'''<br />
|[https://github.com/illumos/illumos-gate/commit/f17457368189aa911f774c38c1f21875a568bdca Aug 2012]<br />
|-<br />
|'''FreeBSD'''<br />
|[https://github.com/freebsd/freebsd/commit/d9fa2f486ee98b2557e1d5ad5f1af418c663cfc8 Aug 2012]<br />
|-<br />
|'''ZFS on Linux'''<br />
|[https://github.com/zfsonlinux/zfs/commit/753c38392ddff9d3cf140bb4d28f3bfba52c92d2 Dec 2012]<br />
|-<br />
|'''OpenZFS on OS X'''<br />
|[https://github.com/openzfsonosx/zfs/commit/753c38392ddff9d3cf140bb4d28f3bfba52c92d2 Dec 2012]<br />
|}<br />
<br />
==== Single Copy ARC ====<br />
<br />
OpenZFS caches disk blocks in-memory in the adaptive replacement cache (ARC). Originally when the same disk block was accessed from different clones it was cached multiple times (one for each clone accessing the block) in case a clone planned to modify the block. With these changes OpenZFS caches at most one copy of every block unless a clone is actually modifying the block.<br />
<br />
{| class="wikitable"<br />
|-<br />
|'''illumos'''<br />
|[https://github.com/illumos/illumos-gate/commit/9253d63df408bb48584e0b1abfcc24ef2472382e Sep 2012]<br />
|-<br />
|'''FreeBSD'''<br />
|[https://github.com/freebsd/freebsd/commit/8e1fdec2c76a948b16ebf8e4abe2cb73a60d3477 Nov 2012]<br />
|-<br />
|'''ZFS on Linux'''<br />
|[https://github.com/zfsonlinux/zfs/commit/1eb5bfa3dcdaecb19543d9df13131374a7a42947 Dec 2012]<br />
|-<br />
|'''OpenZFS on OS X'''<br />
|[https://github.com/openzfsonosx/zfs/commit/1eb5bfa3dcdaecb19543d9df13131374a7a42947 Dec 2012]<br />
|}<br />
<br />
==== TRIM Support ====<br />
<br />
TRIM support provides the ability to pass deletes / frees through to underlying vdevs that help to ensure devices such as SSD's, which rely on receiving TRIM / UNMAP requests for sectors which are no longer needed, maintain optimal performance.<br />
<br />
The current FreeBSD implementation builds a map of regions that were freed. On every write the<br />
code consults the map and removes ranges that were freed before, but are now overwritten.<br />
<br />
Freed blocks are not TRIMed immediately, there is a low priority thread that TRIMs ranges when the time comes.<br />
<br />
Support for TRIM has been demonstrated to significantly improved the general performance of SSD in the field, eliminating the need for regular secure erase cycles on busy hosts.<br />
<br />
An alternative method, which is arguably better, and works by tracking the metaslab allocator is also in progress and can be found here:<br />
[http://cr.illumos.org/~webrev/skiselkov/zfs_unmap/ ZFS TRIM Support for illumos]<br />
<br />
There is [https://github.com/zfsonlinux/zfs/pull/1016 a pull request for ZFS On Linux] which implements FreeBSD's (Sep 2012) ZFS TRIM support.<br />
<br />
{| class="wikitable"<br />
|-<br />
|'''illumos'''<br />
|not yet ported<br />
|-<br />
|'''FreeBSD'''<br />
|[http://svnweb.freebsd.org/base?view=revision&sortby=file&revision=240868 Sep 2012]<br />
|-<br />
|'''ZFS on Linux'''<br />
|not yet ported<br />
|-<br />
|'''OpenZFS on OS X'''<br />
|not yet ported<br />
|}<br />
<br />
==== FASTWRITE Algorithm ====<br />
<br />
Improves synchronous IO performance.<br />
<br />
{| class="wikitable"<br />
|-<br />
|'''illumos'''<br />
|not yet ported<br />
|-<br />
|'''FreeBSD'''<br />
|not yet ported<br />
|-<br />
|'''ZFS on Linux'''<br />
|[https://github.com/zfsonlinux/zfs/commit/920dd524fb2997225d4b1ac180bcbc14b045fda6 Oct 2012]<br />
|-<br />
|'''OpenZFS on OS X'''<br />
|[https://github.com/openzfsonosx/zfs/commit/920dd524fb2997225d4b1ac180bcbc14b045fda6 Oct 2012]<br />
|}<br />
<br />
Note that a [https://github.com/ryao/zfs/commit/858822a04b4563657b2267131e90d9687d67e31b locking enhancement] is being reviewed.<br />
<br />
==== Block Freeing Performance Improvments ====<br />
<br />
Performance analysis of OpenZFS revealed that the algorithms used when freeing blocks could cause significant performance problems when freeing a large amount of blocks in a single transaction or when dealing with fragmented pools. Several performance improvements were made in this area.<br />
<br />
{| class="wikitable"<br />
|-<br />
|'''illumos'''<br />
|[https://github.com/illumos/illumos-gate/commit/01f55e48fb4d524eaf70687728aa51b7762e2e97 Nov 2012]<br />
|[https://github.com/illumos/illumos-gate/commit/16a4a8074274d2d7cc408589cf6359f4a378c861 Feb 2013]<br />
|[https://github.com/illumos/illumos-gate/commit/9eb57f7f3fbb970d4b9b89dcd5ecf543fe2414d5 Feb 2013]<br />
|-<br />
|'''FreeBSD'''<br />
|[https://github.com/freebsd/freebsd/commit/5d9b3f284b13ac492326e05f6ba4c00e98adf05c Nov 2012]<br />
|[https://github.com/freebsd/freebsd/commit/18e9a0422b52091035dae9d69bde9dd571a8ff7e Feb 2013]<br />
|[https://github.com/freebsd/freebsd/commit/18e9a0422b52091035dae9d69bde9dd571a8ff7e Feb 2013]<br />
|-<br />
|'''ZFS on Linux'''<br />
|[https://github.com/zfsonlinux/zfs/commit/55d85d5a8c45c4559a4a0e675c37b0c3afb19c2f May 2013]<br />
|[https://github.com/zfsonlinux/zfs/commit/e51be06697762215dc3b679f8668987034a5a048 June 2013]<br />
|not yet<br />
|-<br />
|'''OpenZFS on OS X'''<br />
|[https://github.com/openzfsonosx/zfs/commit/55d85d5a8c45c4559a4a0e675c37b0c3afb19c2f May 2013]<br />
|[https://github.com/openzfsonosx/zfs/commit/e51be06697762215dc3b679f8668987034a5a048 June 2013]<br />
|not yet<br />
|}<br />
<br />
==== nop-write ====<br />
<br />
ZFS supports end-to-end checksumming of every data block. When a cryptographically secure checksum is being used OpenZFS will compare the checksums of incoming writes to checksum of the existing on-disk data and avoid issuing any write i/o for data that has not changed. This can help performance and snapshot space usage in situations were the same files are regularly overwritten with almost-identical data (e.g. regular full-backups of large random-access files).<br />
<br />
{| class="wikitable"<br />
|-<br />
|'''illumos'''<br />
|[https://github.com/illumos/illumos-gate/commit/80901aea8e78a2c20751f61f01bebd1d5b5c2ba5 Nov 2012]<br />
|-<br />
|'''FreeBSD'''<br />
|[https://github.com/freebsd/freebsd/commit/3a0bfecf052237768517963f169d0797e2978f59 Nov 2012]<br />
|-<br />
|'''ZFS on Linux'''<br />
|[https://github.com/zfsonlinux/zfs/commit/03c6040bee6c87a9413b7da41d9f580f79a8ab62 Nov 2013]<br />
|-<br />
|'''OpenZFS on OS X'''<br />
|not yet<br />
|}<br />
<br />
==== lz4 compression ====<br />
<br />
OpenZFS supports on-the-fly compression of all user data with a variety of compression algorithm. This feature adds support for the lz4 compression algorithm. lz4 is usually faster and compresses data better than lzjb, the old default OpenZFS compression algorithm.<br />
<br />
Note: The <tt>lz4_compress</tt> feature flag must be enabled to take advantage of this.<br />
<br />
{| class="wikitable"<br />
|-<br />
|'''illumos'''<br />
|[https://github.com/illumos/illumos-gate/commit/a6f561b4aee75d0d028e7b36b151c8ed8a86bc76 Jan 2013]<br />
|-<br />
|'''FreeBSD'''<br />
|[https://github.com/freebsd/freebsd/commit/c6d9dc1ad2d2e36220845b84a2d180bd97354797 Feb 2013]<br />
|-<br />
|'''ZFS on Linux'''<br />
|[https://github.com/zfsonlinux/zfs/commit/9759c60f1a1503e48dc5c45a209c3edd5758319f Jan 2013]<br />
|-<br />
|'''OpenZFS on OS X'''<br />
|[https://github.com/openzfsonosx/zfs/commit/9759c60f1a1503e48dc5c45a209c3edd5758319f Jan 2013]<br />
|}<br />
<br />
==== synctask rewrite ====<br />
<br />
{| class="wikitable"<br />
|-<br />
|'''illumos'''<br />
|[https://github.com/illumos/illumos-gate/commit/3b2aab18808792cbd248a12f1edf139b89833c13 Feb 2013]<br />
|-<br />
|'''FreeBSD'''<br />
|[https://github.com/freebsd/freebsd/commit/f1985e5cd725ff1816cd4afbdee2d95b661883f0 March 2013]<br />
|-<br />
|'''ZFS on Linux'''<br />
|[https://github.com/zfsonlinux/zfs/commit/13fe019870c8779bf2f5b3ff731b512cf89133ef Sept 2013]<br />
|-<br />
|'''OpenZFS on OS X'''<br />
|[https://github.com/openzfsonosx/zfs/commit/13fe019870c8779bf2f5b3ff731b512cf89133ef Sept 2013]<br />
|}<br />
<br />
==== l2arc compression ====<br />
<br />
{| class="wikitable"<br />
|-<br />
|'''illumos'''<br />
|[https://github.com/illumos/illumos-gate/commit/aad02571bc59671aa3103bb070ae365f531b0b62 Jun 2013]<br />
|-<br />
|'''FreeBSD'''<br />
|[https://github.com/freebsd/freebsd/commit/b20363fe596a7e3a55d5b62f4d3fdb482c65c47a Jun 2013]<br />
|-<br />
|'''ZFS on Linux'''<br />
|[https://github.com/zfsonlinux/zfs/commit/3a17a7a99a1a6332d0999f9be68e2b8dc3933de1 Aug 2013]<br />
|-<br />
|'''OpenZFS on OS X'''<br />
|[https://github.com/openzfsonosx/zfs/commit/3a17a7a99a1a6332d0999f9be68e2b8dc3933de1 Aug 2013]<br />
|}<br />
<br />
==== ARC Shouldn't Cache Freed Blocks ====<br />
<br />
Originally cached blocks in the ARC remained cached until they were evicted due to memory pressure, even if the underlying disk block was freed. In some workloads these freed blocks were so frequently accessed before they were freed that the ARC continued to cache them while evicting blocks which had not been freed yet. Since freed blocks could never be accessed again continuing to cache them was unnecessary. In OpenZFS ARC blocks are evicted immediately when their underlying data blocks are freed.<br />
<br />
{| class="wikitable"<br />
|-<br />
|'''illumos'''<br />
|[https://github.com/illumos/illumos-gate/commit/6e6d5868f52089b9026785bd90257a3d3f6e5ee2 Jun 2013]<br />
|-<br />
|'''FreeBSD'''<br />
|[https://github.com/freebsd/freebsd/commit/13d822743426263ee50bcf047ab41a1e386156a8 Jun 2013]<br />
|-<br />
|'''ZFS on Linux'''<br />
|[https://github.com/zfsonlinux/zfs/commit/df4474f92d0b1b8d54e1914fdd56be2b75f1ff5e Jun 2013]<br />
|-<br />
|'''OpenZFS on OS X'''<br />
|[https://github.com/openzfsonosx/zfs/commit/df4474f92d0b1b8d54e1914fdd56be2b75f1ff5e Jun 2013]<br />
|}<br />
<br />
==== Improve N-way mirror read performance ====<br />
<br />
Queues read requests to least busy leaf vdev in mirrors.<br />
<br />
In addition to the vdev load biasing first implemented by ZFS on Linux in July 2013, the FreeBSD October 2013 version added I/O locality and device rotational information to further enhance the performance.<br />
<br />
{| class="wikitable"<br />
!OS<br />
!Load<br />
!Load + I/O Locality & Rotational Information<br />
|-<br />
|'''illumos'''<br />
|not yet ported<br />
|not yet ported<br />
|-<br />
|'''FreeBSD'''<br />
|N/A<br />
|[http://svnweb.freebsd.org/changeset/base/256956 23rd October 2013]<br />
|-<br />
|'''ZFS on Linux'''<br />
|[https://github.com/zfsonlinux/zfs/commit/556011dbec2d10579819078559a77630fc559112 Jul 2013]<br />
|not yet ported<br />
|-<br />
|'''OpenZFS on OS X'''<br />
|[https://github.com/openzfsonosx/zfs/commit/556011dbec2d10579819078559a77630fc559112 Jul 2013]<br />
|not yet ported<br />
|}<br />
<br />
==== Smoother Write Throttle ====<br />
<br />
The write throttle (dsl_pool_tempreserve_space() and txg_constrain_throughput()) is rewritten to produce much more consistent delays when under constant load. The new write throttle is based on the amount of dirty data, rather than guesses about future performance of the system. When there is a lot of dirty data, each transaction (e.g. write() syscall) will be delayed by the same small amount. This eliminates the "brick wall of wait" that the old write throttle could hit, causing all transactions to wait several seconds until the next txg opens. One of the keys to the new write throttle is decrementing the amount of dirty data as i/o completes, rather than at the end of spa_sync(). Note that the write throttle is only applied once the i/o scheduler is issuing the maximum number of outstanding async writes. See the block comments in dsl_pool.c and above dmu_tx_delay() for more details.<br />
<br />
The ZFS i/o scheduler (vdev_queue.c) now divides i/os into 5 classes: sync read, sync write, async read, async write, and scrub/resilver. The scheduler issues a number of concurrent i/os from each class to the device. Once a class has been selected, an i/o is selected from this class using either an elevator algorithem (async, scrub classes) or FIFO (sync classes). The number of concurrent async write i/os is tuned dynamically based on i/o load, to achieve good sync i/o latency when there is not a high load of writes, and good write throughput when there is. See the block comment in vdev_queue.c for more details.<br />
<br />
{| class="wikitable"<br />
|-<br />
|'''illumos'''<br />
|[https://github.com/illumos/illumos-gate/commit/69962b5647e4a8b9b14998733b765925381b727e Aug 2013]<br />
|-<br />
|'''FreeBSD'''<br />
|[http://svnweb.freebsd.org/changeset/base/258632 Nov 2013]<br />
|-<br />
|'''ZFS on Linux'''<br />
|[https://github.com/zfsonlinux/zfs/commit/e8b96c6007bf97cdf34869c1ffbd0ce753873a3d Dec 2013]<br />
|-<br />
|'''OpenZFS on OS X'''<br />
|not yet<br />
|}<br />
<br />
== Dataset Properties ==<br />
<br />
These are new filesystem, volume, and snapshot properties which can be accessed with the <tt>zfs(1)</tt> command's <tt>get</tt> subcommand. See the <tt>zfs(1)</tt> manpage for your distribution for more details on each of these properties.<br />
<br />
{| class="wikitable"<br />
!Property<br />
!Description<br />
!illumos<br />
!FreeBSD<br />
!ZFS on Linux<br />
!OpenZFS on OS X<br />
|-<br />
|<tt>refcompressratio</tt><br />
|The compression ratio acheived for all data referenced by (but not necessarily unique to) a snapshot, filesystem, or volume, expressed as a multiplier.<br />
|[https://github.com/illumos/illumos-gate/commit/187d6ac08adc31ea6868bde0cfbbb288826254e8 Jun 2011]<br />
|[https://github.com/freebsd/freebsd/commit/333e34b938a2b5e7b036e02b36408880b415109c Jun 2011]<br />
|[https://github.com/zfsonlinux/zfs/commit/77999e804fff35782ab4b578d2cecf064c54a841 Aug 2012]<br />
|[https://github.com/openzfsonosx/zfs/commit/77999e804fff35782ab4b578d2cecf064c54a841 Aug 2012]<br />
|-<br />
|<tt>clones</tt><br />
|For snapshots, this property is a comma-separated list of filesystems or volumes which are clones of this snapshot.<br />
|[https://github.com/illumos/illumos-gate/commit/e5351341b58845eee9d722bd71543d5a7c26b6cc Nov 2011]<br />
|[https://github.com/freebsd/freebsd/commit/73cab7197174153a718dedc97ff344341bcf6098 Nov 2011]<br />
|[https://github.com/zfsonlinux/zfs/commit/330d06f90d143b41b276796526a66a1c1fff046d Jul 2012]<br />
|[https://github.com/openzfsonosx/zfs/commit/330d06f90d143b41b276796526a66a1c1fff046d Jul 2012]<br />
|-<br />
|<tt>written</tt><br />
|The amount of referenced space written to this dataset since the previous snapshot.<br />
|[https://github.com/illumos/illumos-gate/commit/e5351341b58845eee9d722bd71543d5a7c26b6cc Nov 2011]<br />
|[https://github.com/freebsd/freebsd/commit/73cab7197174153a718dedc97ff344341bcf6098 Nov 2011]<br />
|[https://github.com/zfsonlinux/zfs/commit/330d06f90d143b41b276796526a66a1c1fff046d Jul 2012]<br />
|[https://github.com/openzfsonosx/zfs/commit/330d06f90d143b41b276796526a66a1c1fff046d Jul 2012]<br />
|-<br />
|<tt>written@''<snap>''</tt><br />
|The amount of referenced space written to this dataset since the specified snapshot. This is the space referenced by this dataset, but not referenced by the specified snapshot.<br />
|[https://github.com/illumos/illumos-gate/commit/e5351341b58845eee9d722bd71543d5a7c26b6cc Nov 2011]<br />
|[https://github.com/freebsd/freebsd/commit/73cab7197174153a718dedc97ff344341bcf6098 Nov 2011]<br />
|[https://github.com/zfsonlinux/zfs/commit/330d06f90d143b41b276796526a66a1c1fff046d Jul 2012]<br />
|[https://github.com/openzfsonosx/zfs/commit/330d06f90d143b41b276796526a66a1c1fff046d Jul 2012]<br />
|-<br />
|<tt>logicalused</tt>, <tt>logicalreferenced</tt><br />
|The amount of space used or referenced, before taking into account compression.<br />
|[https://github.com/illumos/illumos-gate/commit/77372cb0f35e8d3615ca2e16044f033397e88e21 Feb 2013]<br />
|[https://github.com/freebsd/freebsd/commit/2bed8f5691b7572d6f31bfc68e9f762a938af863 Mar 2013]<br />
|not yet<br />
|not yet<br />
|-<br />
|}</div>Grahamperrinhttps://openzfs.org/w/index.php?title=Features&diff=1664Features2015-02-12T04:59:00Z<p>Grahamperrin: large_blocks is in the man page for FreeBSD 11 current so I assume that it's C</p>
<hr />
<div>This page describes some of the more important features and performance improvements that are part of OpenZFS.<br />
<br />
Help would be appreciated in porting features between platforms whose status is "not yet".<br />
<br />
== Feature Flags ==<br />
<br />
{| class="wikitable"<br />
|<br />
| '''illumos'''<br />
| '''FreeBSD'''<br />
| '''ZFS on Linux'''<br />
| '''OpenZFS on OS X'''<br />
|-<br />
| '''async_destroy'''<br />
| Y<br />
| Y<br />
| Y<br />
| Y<br />
|-<br />
| '''bookmarks'''<br />
| Y<br />
| S<br />
| N<br />
| Y<br />
|-<br />
| '''embedded_data'''<br />
| Y<br />
| C<br />
| <br />
| Y<br />
|-<br />
| '''empty_bpobj'''<br />
| Y<br />
| Y<br />
| Y<br />
| Y<br />
|-<br />
| '''enabled_txg'''<br />
| Y<br />
| S<br />
| N<br />
| Y<br />
|-<br />
| '''extensible_dataset'''<br />
| Y<br />
| S<br />
| N<br />
| Y<br />
|-<br />
| '''filesystem_limits'''<br />
| Y<br />
| C<br />
| <br />
| N<br />
|-<br />
| '''hole_birth'''<br />
| Y<br />
| S<br />
| N<br />
| Y<br />
|-<br />
| '''large_blocks'''<br />
| Y<br />
| <br />
| C<br />
| N<br />
|-<br />
| '''lz4_compress'''<br />
| Y<br />
| Y<br />
| Y<br />
| Y<br />
|-<br />
| '''multi_vdev_crash_dump'''<br />
| Y<br />
| S<br />
| N<br />
| N<br />
|-<br />
| '''spacemap_histogram'''<br />
| Y<br />
| S<br />
| N<br />
| Y<br />
|}<br />
<br />
'''Table legends'''<br />
<br />
FreeBSD: <br />
* N = not implemented<br />
* C = implemented in -CURRENT<br />
* S = implemented in -CURRENT and -STABLE<br />
* Y = implemented in -RELEASE<br />
<br />
Other distributions: <br />
* N = not implemented<br />
* Y = implemented<br />
<br />
For greatest compatibility, features that are exclusive (when enabled) should be periodically ported to all other distributions.<br />
<br />
=== Background ===<br />
<br />
Originally the ZFS on-disk format was versioned with a single number that was increased whenever a new on-disk format change was introduced. This worked well when a single entity controlled the development of ZFS; however, in the more distributed development model of OpenZFS a single version number is not ideal. Every OpenZFS implementation would need to agree on every change to the on-disk format.<br />
<br />
One of the first OpenZFS projects was a new versioning system called "feature flags" that tags on-disk format changes with unique names. The system supports both completely independent format changes, as well as format changes that depend on each other. A pool's on-disk format is portable between OpenZFS implementations as long as all of the feature flags in use by the pool are supported by both implementations.<br />
<br />
For more details see these [http://blog.delphix.com/csiden/files/2012/01/ZFS_Feature_Flags.pdf slides (Jan 2012)] and [http://illumos.org/man/5/zpool-features <tt>zpool-features(5)</tt>] (illumos) or [http://www.freebsd.org/cgi/man.cgi?query=zpool-features&sektion=7&manpath=FreeBSD+11-current <tt>zpool-features(7)</tt>] (FreeBSD).<br />
<br />
== libzfs_core ==<br />
<br />
See this [http://blog.delphix.com/matt/2012/01/17/the-future-of-libzfs/ blog post (Jan 2012)] and associated [http://blog.delphix.com/matt/files/2012/01/The_Future_of_LibZFS.pdf slides] and [http://www.youtube.com/watch?feature=player_embedded&list=PL1A94C8EECCAF7340&v=iJ0S91ygErE video] for more details.<br />
<br />
First introduced in:<br />
{| class="wikitable"<br />
|-<br />
|'''illumos'''<br />
|[https://github.com/illumos/illumos-gate/commit/4445fffbbb1ea25fd0e9ea68b9380dd7a6709025 June 2012]<br />
|-<br />
|'''FreeBSD'''<br />
|[https://github.com/freebsd/freebsd/commit/f1985e5cd725ff1816cd4afbdee2d95b661883f0 March 2013]<br />
|-<br />
|'''ZFS on Linux'''<br />
|[https://github.com/zfsonlinux/zfs/commit/6f1ffb06655008c9b519108ed29fbf03acd6e5de August 2013]<br />
|-<br />
|'''OpenZFS on OS X'''<br />
|[https://github.com/openzfsonosx/zfs/commit/50b0b2d9ea604d29ed729be8fa61bb77ae3ff4e9 October 2013]<br />
|}<br />
<br />
== CLI Usability ==<br />
<br />
These are improvements to the command line interface. While the end result is a generally more friendly user interface, getting the desired behavior often required modifications to the core of ZFS.<br />
<br />
''Listed in chronological order (oldest first).''<br />
<br />
==== Pool Comment ====<br />
<br />
OpenZFS has a per-pool comment property which can be set with the <tt>zpool set</tt> command and can be read even if the pool is not imported, so it is accessible even if pool import fails.<br />
<br />
{| class="wikitable"<br />
|-<br />
|'''illumos'''<br />
|[https://github.com/illumos/illumos-gate/commit/8704186e373c9ed74daa395ff3f7fd745396df9e Nov 2011]<br />
|-<br />
|'''FreeBSD'''<br />
|[https://github.com/freebsd/freebsd/commit/73cab7197174153a718dedc97ff344341bcf6098 Nov 2011]<br />
|-<br />
|'''ZFS on Linux'''<br />
|[https://github.com/zfsonlinux/zfs/commit/d96eb2b1538db13ee7a716ec0e1162f5735edc12 Aug 2012]<br />
|-<br />
|'''OpenZFS on OS X'''<br />
|[https://github.com/openzfsonosx/zfs/commit/d96eb2b1538db13ee7a716ec0e1162f5735edc12 Aug 2012]<br />
|}<br />
<br />
==== Size Estimates for <tt>zfs send</tt> and <tt>zfs destroy</tt> ====<br />
<br />
This feature enhances OpenZFS's internal space accounting information. This new accounting information is used to provide a <tt>-n</tt> (dry-run) option for <tt>zfs send</tt> which can instantly calculate the amount of send stream data a specific <tt>zfs send</tt> command would generate. It is also used for a <tt>-n</tt> option for <tt>zfs destroy</tt> which can instantly calculate the amount of space that would be reclaimed by a specific <tt>zfs destroy</tt> command.<br />
<br />
{| class="wikitable"<br />
|-<br />
|'''illumos'''<br />
|[https://github.com/illumos/illumos-gate/commit/e5351341b58845eee9d722bd71543d5a7c26b6cc Nov 2011]<br />
|-<br />
|'''FreeBSD'''<br />
|[https://github.com/freebsd/freebsd/commit/73cab7197174153a718dedc97ff344341bcf6098 Nov 2011]<br />
|-<br />
|'''ZFS on Linux'''<br />
|[https://github.com/zfsonlinux/zfs/commit/330d06f90d143b41b276796526a66a1c1fff046d Jul 2012]<br />
|-<br />
|'''OpenZFS on OS X'''<br />
|[https://github.com/openzfsonosx/zfs/commit/330d06f90d143b41b276796526a66a1c1fff046d Jul 2012]<br />
|}<br />
<br />
==== vdev Information in <tt>zpool list</tt> ====<br />
<br />
OpenZFS adds a <tt>-v</tt> option to the <tt>zpool list</tt> command which shows detailed sizing information about the vdevs in the pool:<br />
<br />
$ zpool list -v<br />
NAME SIZE ALLOC FREE EXPANDSZ CAP DEDUP HEALTH ALTROOT<br />
dcenter 5.24T 3.85T 1.39T - 73% 1.00x ONLINE -<br />
mirror 556G 469G 86.7G -<br />
c2t1d0 - - - -<br />
c2t0d0 - - - -<br />
mirror 556G 493G 63.0G -<br />
c2t3d0 - - - -<br />
c2t2d0 - - - -<br />
mirror 556G 493G 62.7G -<br />
c2t5d0 - - - -<br />
c2t4d0 - - - -<br />
mirror 556G 494G 62.5G -<br />
c2t8d0 - - - -<br />
c2t6d0 - - - -<br />
mirror 556G 494G 62.2G -<br />
c2t10d0 - - - -<br />
c2t9d0 - - - -<br />
mirror 556G 494G 61.9G -<br />
c2t12d0 - - - -<br />
c2t11d0 - - - -<br />
mirror 1016G 507G 509G -<br />
c1t1d0 - - - -<br />
c1t5d0 - - - -<br />
mirror 1016G 496G 520G -<br />
c1t3d0 - - - -<br />
c1t4d0 - - - -<br />
<br />
{| class="wikitable"<br />
|-<br />
|'''illumos'''<br />
|[https://github.com/illumos/illumos-gate/commit/4263d13f00c9691fa14620eff82abef795be0693 Jan 2012]<br />
|-<br />
|'''FreeBSD'''<br />
|[https://github.com/freebsd/freebsd/commit/38ef930079cbb1df5de9df3c1064426dba3976b1 May 2012]<br />
|-<br />
|'''ZFS on Linux'''<br />
|[https://github.com/zfsonlinux/zfs/commit/1bd201e70d57464fd26bf9089ea4b44fd49e4f2d Sept 2012]<br />
|-<br />
|'''OpenZFS on OS X'''<br />
|[https://github.com/openzfsonosx/zfs/commit/1bd201e70d57464fd26bf9089ea4b44fd49e4f2d Sept 2012]<br />
|}<br />
<br />
==== ZFS list snapshot property alias ====<br />
<br />
Functionally identical to Solaris 11 extension <code>zfs list -t snap</code>.<br />
<br />
{| class="wikitable"<br />
|-<br />
|'''illumos'''<br />
|not yet<br />
|-<br />
|'''FreeBSD'''<br />
|[http://svnweb.freebsd.org/changeset/base/256999 Oct 2013]<br />
|-<br />
|'''ZFS on Linux'''<br />
|[https://github.com/zfsonlinux/zfs/commit/cf81b00a73fe47fdb21586ac1cc179b734540973 Apr 2012]<br />
|-<br />
|'''OpenZFS on OS X'''<br />
|[https://github.com/openzfsonosx/zfs/commit/cf81b00a73fe47fdb21586ac1cc179b734540973 Apr 2012]<br />
|}<br />
<br />
==== ZFS snapshot alias ====<br />
<br />
Functionally identical to Solaris 11 extension <code>zfs snap</code>.<br />
<br />
{| class="wikitable"<br />
|-<br />
|'''illumos'''<br />
|not yet<br />
|-<br />
|'''FreeBSD'''<br />
|[http://svnweb.freebsd.org/changeset/base/256999 Oct 2013]<br />
|-<br />
|'''ZFS on Linux'''<br />
|[https://github.com/zfsonlinux/zfs/commit/10b75496bb0cb7a7b8146c263164adc37f1d176a Apr 2012]<br />
|-<br />
|'''OpenZFS on OS X'''<br />
|[https://github.com/openzfsonosx/zfs/commit/10b75496bb0cb7a7b8146c263164adc37f1d176a Apr 2012]<br />
|}<br />
<br />
==== <tt>zfs send</tt> Progress Reporting ====<br />
<br />
OpenZFS introduces a <tt>-v</tt> option to <tt>zfs send</tt> which reports per-second information on how much data has been sent, how long it has taken, and how much data remains to be sent.<br />
<br />
{| class="wikitable"<br />
|-<br />
|'''illumos'''<br />
|[https://github.com/illumos/illumos-gate/commit/4e3c9f4489a18514e5e8caeb91d4e6db07c98415 May 2012]<br />
|-<br />
|'''FreeBSD'''<br />
|[https://github.com/freebsd/freebsd/commit/046ff8962602e8d65b6b3fae48573513ab7e433f May 2012]<br />
|-<br />
|'''ZFS on Linux'''<br />
|[https://github.com/zfsonlinux/zfs/commit/37abac6d559a1da8ab8e5379442f491b73998f6a Sept 2012]<br />
|-<br />
|'''OpenZFS on OS X'''<br />
|[https://github.com/openzfsonosx/zfs/commit/37abac6d559a1da8ab8e5379442f491b73998f6a Sept 2012]<br />
|}<br />
<br />
==== Arbitrary Snapshot Arguments to <tt>zfs snapshot</tt> ====<br />
<br />
{| class="wikitable"<br />
|-<br />
|'''illumos'''<br />
|[https://github.com/illumos/illumos-gate/commit/4445fffbbb1ea25fd0e9ea68b9380dd7a6709025 June 2012]<br />
|-<br />
|'''FreeBSD'''<br />
|[https://github.com/freebsd/freebsd/commit/f1985e5cd725ff1816cd4afbdee2d95b661883f0 March 2013]<br />
|-<br />
|'''ZFS on Linux'''<br />
|[https://github.com/zfsonlinux/zfs/commit/6f1ffb06655008c9b519108ed29fbf03acd6e5de August 2013]<br />
|-<br />
|'''OpenZFS on OS X'''<br />
|[https://github.com/openzfsonosx/zfs/commit/6f1ffb06655008c9b519108ed29fbf03acd6e5de September 2013]<br />
|}<br />
<br />
== Performance ==<br />
<br />
These are significant performance improvements, often requiring substantial restructuring of the source code.<br />
<br />
''Listed in chronological order (oldest first).''<br />
<br />
==== SA based xattrs ====<br />
<br />
Improves performance of linux-style (short) xattrs by storing them in the dnode_phys_t's bonus block. (Not to be confused with [http://en.wikipedia.org/wiki/Extended_file_attributes#Solaris Solaris-style Extended Attributes] which are full-fledged files or "forks", like NTFS streams. This work could be extended to also improve the performance on illumos of small Extended Attributes whose permissions are the same as the containing file.)<br />
<br />
Requires a disk format change and is off by default until Filesystem (ZPL) Feature Flags are implemented (not to be confused with [[Features#Feature_Flags_Overview | zpool Feature Flags]]).<br />
<br />
{| class="wikitable"<br />
|-<br />
|'''illumos'''<br />
|not yet (needs additional functionality)<br />
|-<br />
|'''FreeBSD'''<br />
|??<br />
|-<br />
|'''ZFS on Linux'''<br />
|[https://github.com/zfsonlinux/zfs/commit/82a37189aac955c81a59a5ecc3400475adb56355 Oct 2011]<br />
|-<br />
|'''OpenZFS on OS X'''<br />
|??<br />
|}<br />
<br />
Note that SA based xattrs are [https://github.com/zfsonlinux/zfs/commit/6a7c0ccca44ad02c476a111d8f7911fc8b12fff7 no longer used on symlinks] as of Aug 2013 until an issue is resolved.<br />
<br />
==== Use the slog even with logbias=throughput ====<br />
<br />
{| class="wikitable"<br />
|-<br />
|'''illumos'''<br />
|??<br />
|-<br />
|'''FreeBSD'''<br />
|??<br />
|-<br />
|'''ZFS on Linux'''<br />
|[https://github.com/zfsonlinux/zfs/commit/5d7a86d114c2706a8d14d94b71f81ad5cdf066c5 Oct 2011]<br />
|-<br />
|'''OpenZFS on OS X'''<br />
|[https://github.com/openzfsonosx/zfs/commit/5d7a86d114c2706a8d14d94b71f81ad5cdf066c5 Oct 2011]<br />
|}<br />
<br />
==== Asynchronous Filesystem and Volume Destruction ====<br />
<br />
Destroying a filesystem requires traversing all of its data in order to return its used blocks to the pool's free list. Before this feature the filesystem was not fully removed until all blocks had been reclaimed. If the destroy operation was interrupted by a reboot or power outage the next attempt to import the pool (probably during boot) would need to complete the destroy operation synchronously, possibly delaying a boot for long periods of time.<br />
<br />
With asynchronous destruction the filesystem's data is immediately moved to a "to be freed" list, allowing the destroy operation to complete without traversing any of the filesystem's data. A background process reclaims blocks from this "to be freed" list and is capable of resuming this process after reboots without slowing the pool import process.<br />
<br />
The new freeing algorithm also has a significant performance improvement when destroying clones. The old algorithm took time proportional to the number of blocks ''referenced'' by the clone, even if most of those blocks could not be reclaimed because they were still referenced by the clone's origin. The new algorithm only takes time proportional to the number of blocks unique to the clone.<br />
<br />
See this [http://blog.delphix.com/matt/2012/07/11/performance-of-zfs-destroy/ blog post] for more detailed performance analysis.<br />
<br />
Note: The <tt>async_destroy</tt> feature flag must be enabled to take advantage of this.<br />
<br />
{| class="wikitable"<br />
|-<br />
|'''illumos'''<br />
|[https://github.com/illumos/illumos-gate/commit/ad135b5d644628e791c3188a6ecbd9c257961ef8 May 2012]<br />
|-<br />
|'''FreeBSD'''<br />
|[https://github.com/freebsd/freebsd/commit/cc61ab2f133566dca51970d44cc49a4355039b5d June 2012]<br />
|-<br />
|'''ZFS on Linux'''<br />
|[https://github.com/zfsonlinux/zfs/commit/9ae529ec5dbdc828ff8326beae58062971d74b2e Jan 2013]<br />
|-<br />
|'''OpenZFS on OS X'''<br />
|[https://github.com/openzfsonosx/zfs/commit/9ae529ec5dbdc828ff8326beae58062971d74b2e Jan 2013]<br />
|}<br />
<br />
==== Reduce Number of Empty bpobjs ====<br />
<br />
Every time OpenZFS takes a snapshot it creates on-disk block pointer objects (bpobj's) to track blocks associated with that snapshot. In common use cases most of these bpobj's are empty, but the number of bpobjs per-snapshot is proportional to the number of snapshots already taken of the same filesystem or volume. When a single filesystem or volume has many (tens of thousands) snapshots these unecessary empty bpobjs can waste space and cause performance problems. OpenZFS waits to create each bpobjs until the first entry is added to it, thus eliminating the empty bpobjs.<br />
<br />
Note: The <tt>empty_bpobj</tt> feature flag must be enabled to take advantage of this.<br />
<br />
{| class="wikitable"<br />
|-<br />
|'''illumos'''<br />
|[https://github.com/illumos/illumos-gate/commit/f17457368189aa911f774c38c1f21875a568bdca Aug 2012]<br />
|-<br />
|'''FreeBSD'''<br />
|[https://github.com/freebsd/freebsd/commit/d9fa2f486ee98b2557e1d5ad5f1af418c663cfc8 Aug 2012]<br />
|-<br />
|'''ZFS on Linux'''<br />
|[https://github.com/zfsonlinux/zfs/commit/753c38392ddff9d3cf140bb4d28f3bfba52c92d2 Dec 2012]<br />
|-<br />
|'''OpenZFS on OS X'''<br />
|[https://github.com/openzfsonosx/zfs/commit/753c38392ddff9d3cf140bb4d28f3bfba52c92d2 Dec 2012]<br />
|}<br />
<br />
==== Single Copy ARC ====<br />
<br />
OpenZFS caches disk blocks in-memory in the adaptive replacement cache (ARC). Originally when the same disk block was accessed from different clones it was cached multiple times (one for each clone accessing the block) in case a clone planned to modify the block. With these changes OpenZFS caches at most one copy of every block unless a clone is actually modifying the block.<br />
<br />
{| class="wikitable"<br />
|-<br />
|'''illumos'''<br />
|[https://github.com/illumos/illumos-gate/commit/9253d63df408bb48584e0b1abfcc24ef2472382e Sep 2012]<br />
|-<br />
|'''FreeBSD'''<br />
|[https://github.com/freebsd/freebsd/commit/8e1fdec2c76a948b16ebf8e4abe2cb73a60d3477 Nov 2012]<br />
|-<br />
|'''ZFS on Linux'''<br />
|[https://github.com/zfsonlinux/zfs/commit/1eb5bfa3dcdaecb19543d9df13131374a7a42947 Dec 2012]<br />
|-<br />
|'''OpenZFS on OS X'''<br />
|[https://github.com/openzfsonosx/zfs/commit/1eb5bfa3dcdaecb19543d9df13131374a7a42947 Dec 2012]<br />
|}<br />
<br />
==== TRIM Support ====<br />
<br />
TRIM support provides the ability to pass deletes / frees through to underlying vdevs that help to ensure devices such as SSD's, which rely on receiving TRIM / UNMAP requests for sectors which are no longer needed, maintain optimal performance.<br />
<br />
The current FreeBSD implementation builds a map of regions that were freed. On every write the<br />
code consults the map and removes ranges that were freed before, but are now overwritten.<br />
<br />
Freed blocks are not TRIMed immediately, there is a low priority thread that TRIMs ranges when the time comes.<br />
<br />
Support for TRIM has been demonstrated to significantly improved the general performance of SSD in the field, eliminating the need for regular secure erase cycles on busy hosts.<br />
<br />
An alternative method, which is arguably better, and works by tracking the metaslab allocator is also in progress and can be found here:<br />
[http://cr.illumos.org/~webrev/skiselkov/zfs_unmap/ ZFS TRIM Support for illumos]<br />
<br />
There is [https://github.com/zfsonlinux/zfs/pull/1016 a pull request for ZFS On Linux] which implements FreeBSD's (Sep 2012) ZFS TRIM support.<br />
<br />
{| class="wikitable"<br />
|-<br />
|'''illumos'''<br />
|not yet ported<br />
|-<br />
|'''FreeBSD'''<br />
|[http://svnweb.freebsd.org/base?view=revision&sortby=file&revision=240868 Sep 2012]<br />
|-<br />
|'''ZFS on Linux'''<br />
|not yet ported<br />
|-<br />
|'''OpenZFS on OS X'''<br />
|not yet ported<br />
|}<br />
<br />
==== FASTWRITE Algorithm ====<br />
<br />
Improves synchronous IO performance.<br />
<br />
{| class="wikitable"<br />
|-<br />
|'''illumos'''<br />
|not yet ported<br />
|-<br />
|'''FreeBSD'''<br />
|not yet ported<br />
|-<br />
|'''ZFS on Linux'''<br />
|[https://github.com/zfsonlinux/zfs/commit/920dd524fb2997225d4b1ac180bcbc14b045fda6 Oct 2012]<br />
|-<br />
|'''OpenZFS on OS X'''<br />
|[https://github.com/openzfsonosx/zfs/commit/920dd524fb2997225d4b1ac180bcbc14b045fda6 Oct 2012]<br />
|}<br />
<br />
Note that a [https://github.com/ryao/zfs/commit/858822a04b4563657b2267131e90d9687d67e31b locking enhancement] is being reviewed.<br />
<br />
==== Block Freeing Performance Improvments ====<br />
<br />
Performance analysis of OpenZFS revealed that the algorithms used when freeing blocks could cause significant performance problems when freeing a large amount of blocks in a single transaction or when dealing with fragmented pools. Several performance improvements were made in this area.<br />
<br />
{| class="wikitable"<br />
|-<br />
|'''illumos'''<br />
|[https://github.com/illumos/illumos-gate/commit/01f55e48fb4d524eaf70687728aa51b7762e2e97 Nov 2012]<br />
|[https://github.com/illumos/illumos-gate/commit/16a4a8074274d2d7cc408589cf6359f4a378c861 Feb 2013]<br />
|[https://github.com/illumos/illumos-gate/commit/9eb57f7f3fbb970d4b9b89dcd5ecf543fe2414d5 Feb 2013]<br />
|-<br />
|'''FreeBSD'''<br />
|[https://github.com/freebsd/freebsd/commit/5d9b3f284b13ac492326e05f6ba4c00e98adf05c Nov 2012]<br />
|[https://github.com/freebsd/freebsd/commit/18e9a0422b52091035dae9d69bde9dd571a8ff7e Feb 2013]<br />
|[https://github.com/freebsd/freebsd/commit/18e9a0422b52091035dae9d69bde9dd571a8ff7e Feb 2013]<br />
|-<br />
|'''ZFS on Linux'''<br />
|[https://github.com/zfsonlinux/zfs/commit/55d85d5a8c45c4559a4a0e675c37b0c3afb19c2f May 2013]<br />
|[https://github.com/zfsonlinux/zfs/commit/e51be06697762215dc3b679f8668987034a5a048 June 2013]<br />
|not yet<br />
|-<br />
|'''OpenZFS on OS X'''<br />
|[https://github.com/openzfsonosx/zfs/commit/55d85d5a8c45c4559a4a0e675c37b0c3afb19c2f May 2013]<br />
|[https://github.com/openzfsonosx/zfs/commit/e51be06697762215dc3b679f8668987034a5a048 June 2013]<br />
|not yet<br />
|}<br />
<br />
==== nop-write ====<br />
<br />
ZFS supports end-to-end checksumming of every data block. When a cryptographically secure checksum is being used OpenZFS will compare the checksums of incoming writes to checksum of the existing on-disk data and avoid issuing any write i/o for data that has not changed. This can help performance and snapshot space usage in situations were the same files are regularly overwritten with almost-identical data (e.g. regular full-backups of large random-access files).<br />
<br />
{| class="wikitable"<br />
|-<br />
|'''illumos'''<br />
|[https://github.com/illumos/illumos-gate/commit/80901aea8e78a2c20751f61f01bebd1d5b5c2ba5 Nov 2012]<br />
|-<br />
|'''FreeBSD'''<br />
|[https://github.com/freebsd/freebsd/commit/3a0bfecf052237768517963f169d0797e2978f59 Nov 2012]<br />
|-<br />
|'''ZFS on Linux'''<br />
|[https://github.com/zfsonlinux/zfs/commit/03c6040bee6c87a9413b7da41d9f580f79a8ab62 Nov 2013]<br />
|-<br />
|'''OpenZFS on OS X'''<br />
|not yet<br />
|}<br />
<br />
==== lz4 compression ====<br />
<br />
OpenZFS supports on-the-fly compression of all user data with a variety of compression algorithm. This feature adds support for the lz4 compression algorithm. lz4 is usually faster and compresses data better than lzjb, the old default OpenZFS compression algorithm.<br />
<br />
Note: The <tt>lz4_compress</tt> feature flag must be enabled to take advantage of this.<br />
<br />
{| class="wikitable"<br />
|-<br />
|'''illumos'''<br />
|[https://github.com/illumos/illumos-gate/commit/a6f561b4aee75d0d028e7b36b151c8ed8a86bc76 Jan 2013]<br />
|-<br />
|'''FreeBSD'''<br />
|[https://github.com/freebsd/freebsd/commit/c6d9dc1ad2d2e36220845b84a2d180bd97354797 Feb 2013]<br />
|-<br />
|'''ZFS on Linux'''<br />
|[https://github.com/zfsonlinux/zfs/commit/9759c60f1a1503e48dc5c45a209c3edd5758319f Jan 2013]<br />
|-<br />
|'''OpenZFS on OS X'''<br />
|[https://github.com/openzfsonosx/zfs/commit/9759c60f1a1503e48dc5c45a209c3edd5758319f Jan 2013]<br />
|}<br />
<br />
==== synctask rewrite ====<br />
<br />
{| class="wikitable"<br />
|-<br />
|'''illumos'''<br />
|[https://github.com/illumos/illumos-gate/commit/3b2aab18808792cbd248a12f1edf139b89833c13 Feb 2013]<br />
|-<br />
|'''FreeBSD'''<br />
|[https://github.com/freebsd/freebsd/commit/f1985e5cd725ff1816cd4afbdee2d95b661883f0 March 2013]<br />
|-<br />
|'''ZFS on Linux'''<br />
|[https://github.com/zfsonlinux/zfs/commit/13fe019870c8779bf2f5b3ff731b512cf89133ef Sept 2013]<br />
|-<br />
|'''OpenZFS on OS X'''<br />
|[https://github.com/openzfsonosx/zfs/commit/13fe019870c8779bf2f5b3ff731b512cf89133ef Sept 2013]<br />
|}<br />
<br />
==== l2arc compression ====<br />
<br />
{| class="wikitable"<br />
|-<br />
|'''illumos'''<br />
|[https://github.com/illumos/illumos-gate/commit/aad02571bc59671aa3103bb070ae365f531b0b62 Jun 2013]<br />
|-<br />
|'''FreeBSD'''<br />
|[https://github.com/freebsd/freebsd/commit/b20363fe596a7e3a55d5b62f4d3fdb482c65c47a Jun 2013]<br />
|-<br />
|'''ZFS on Linux'''<br />
|[https://github.com/zfsonlinux/zfs/commit/3a17a7a99a1a6332d0999f9be68e2b8dc3933de1 Aug 2013]<br />
|-<br />
|'''OpenZFS on OS X'''<br />
|[https://github.com/openzfsonosx/zfs/commit/3a17a7a99a1a6332d0999f9be68e2b8dc3933de1 Aug 2013]<br />
|}<br />
<br />
==== ARC Shouldn't Cache Freed Blocks ====<br />
<br />
Originally cached blocks in the ARC remained cached until they were evicted due to memory pressure, even if the underlying disk block was freed. In some workloads these freed blocks were so frequently accessed before they were freed that the ARC continued to cache them while evicting blocks which had not been freed yet. Since freed blocks could never be accessed again continuing to cache them was unnecessary. In OpenZFS ARC blocks are evicted immediately when their underlying data blocks are freed.<br />
<br />
{| class="wikitable"<br />
|-<br />
|'''illumos'''<br />
|[https://github.com/illumos/illumos-gate/commit/6e6d5868f52089b9026785bd90257a3d3f6e5ee2 Jun 2013]<br />
|-<br />
|'''FreeBSD'''<br />
|[https://github.com/freebsd/freebsd/commit/13d822743426263ee50bcf047ab41a1e386156a8 Jun 2013]<br />
|-<br />
|'''ZFS on Linux'''<br />
|[https://github.com/zfsonlinux/zfs/commit/df4474f92d0b1b8d54e1914fdd56be2b75f1ff5e Jun 2013]<br />
|-<br />
|'''OpenZFS on OS X'''<br />
|[https://github.com/openzfsonosx/zfs/commit/df4474f92d0b1b8d54e1914fdd56be2b75f1ff5e Jun 2013]<br />
|}<br />
<br />
==== Improve N-way mirror read performance ====<br />
<br />
Queues read requests to least busy leaf vdev in mirrors.<br />
<br />
In addition to the vdev load biasing first implemented by ZFS on Linux in July 2013, the FreeBSD October 2013 version added I/O locality and device rotational information to further enhance the performance.<br />
<br />
{| class="wikitable"<br />
!OS<br />
!Load<br />
!Load + I/O Locality & Rotational Information<br />
|-<br />
|'''illumos'''<br />
|not yet ported<br />
|not yet ported<br />
|-<br />
|'''FreeBSD'''<br />
|N/A<br />
|[http://svnweb.freebsd.org/changeset/base/256956 23rd October 2013]<br />
|-<br />
|'''ZFS on Linux'''<br />
|[https://github.com/zfsonlinux/zfs/commit/556011dbec2d10579819078559a77630fc559112 Jul 2013]<br />
|not yet ported<br />
|-<br />
|'''OpenZFS on OS X'''<br />
|[https://github.com/openzfsonosx/zfs/commit/556011dbec2d10579819078559a77630fc559112 Jul 2013]<br />
|not yet ported<br />
|}<br />
<br />
==== Smoother Write Throttle ====<br />
<br />
The write throttle (dsl_pool_tempreserve_space() and txg_constrain_throughput()) is rewritten to produce much more consistent delays when under constant load. The new write throttle is based on the amount of dirty data, rather than guesses about future performance of the system. When there is a lot of dirty data, each transaction (e.g. write() syscall) will be delayed by the same small amount. This eliminates the "brick wall of wait" that the old write throttle could hit, causing all transactions to wait several seconds until the next txg opens. One of the keys to the new write throttle is decrementing the amount of dirty data as i/o completes, rather than at the end of spa_sync(). Note that the write throttle is only applied once the i/o scheduler is issuing the maximum number of outstanding async writes. See the block comments in dsl_pool.c and above dmu_tx_delay() for more details.<br />
<br />
The ZFS i/o scheduler (vdev_queue.c) now divides i/os into 5 classes: sync read, sync write, async read, async write, and scrub/resilver. The scheduler issues a number of concurrent i/os from each class to the device. Once a class has been selected, an i/o is selected from this class using either an elevator algorithem (async, scrub classes) or FIFO (sync classes). The number of concurrent async write i/os is tuned dynamically based on i/o load, to achieve good sync i/o latency when there is not a high load of writes, and good write throughput when there is. See the block comment in vdev_queue.c for more details.<br />
<br />
{| class="wikitable"<br />
|-<br />
|'''illumos'''<br />
|[https://github.com/illumos/illumos-gate/commit/69962b5647e4a8b9b14998733b765925381b727e Aug 2013]<br />
|-<br />
|'''FreeBSD'''<br />
|[http://svnweb.freebsd.org/changeset/base/258632 Nov 2013]<br />
|-<br />
|'''ZFS on Linux'''<br />
|[https://github.com/zfsonlinux/zfs/commit/e8b96c6007bf97cdf34869c1ffbd0ce753873a3d Dec 2013]<br />
|-<br />
|'''OpenZFS on OS X'''<br />
|not yet<br />
|}<br />
<br />
== Dataset Properties ==<br />
<br />
These are new filesystem, volume, and snapshot properties which can be accessed with the <tt>zfs(1)</tt> command's <tt>get</tt> subcommand. See the <tt>zfs(1)</tt> manpage for your distribution for more details on each of these properties.<br />
<br />
{| class="wikitable"<br />
!Property<br />
!Description<br />
!illumos<br />
!FreeBSD<br />
!ZFS on Linux<br />
!OpenZFS on OS X<br />
|-<br />
|<tt>refcompressratio</tt><br />
|The compression ratio acheived for all data referenced by (but not necessarily unique to) a snapshot, filesystem, or volume, expressed as a multiplier.<br />
|[https://github.com/illumos/illumos-gate/commit/187d6ac08adc31ea6868bde0cfbbb288826254e8 Jun 2011]<br />
|[https://github.com/freebsd/freebsd/commit/333e34b938a2b5e7b036e02b36408880b415109c Jun 2011]<br />
|[https://github.com/zfsonlinux/zfs/commit/77999e804fff35782ab4b578d2cecf064c54a841 Aug 2012]<br />
|[https://github.com/openzfsonosx/zfs/commit/77999e804fff35782ab4b578d2cecf064c54a841 Aug 2012]<br />
|-<br />
|<tt>clones</tt><br />
|For snapshots, this property is a comma-separated list of filesystems or volumes which are clones of this snapshot.<br />
|[https://github.com/illumos/illumos-gate/commit/e5351341b58845eee9d722bd71543d5a7c26b6cc Nov 2011]<br />
|[https://github.com/freebsd/freebsd/commit/73cab7197174153a718dedc97ff344341bcf6098 Nov 2011]<br />
|[https://github.com/zfsonlinux/zfs/commit/330d06f90d143b41b276796526a66a1c1fff046d Jul 2012]<br />
|[https://github.com/openzfsonosx/zfs/commit/330d06f90d143b41b276796526a66a1c1fff046d Jul 2012]<br />
|-<br />
|<tt>written</tt><br />
|The amount of referenced space written to this dataset since the previous snapshot.<br />
|[https://github.com/illumos/illumos-gate/commit/e5351341b58845eee9d722bd71543d5a7c26b6cc Nov 2011]<br />
|[https://github.com/freebsd/freebsd/commit/73cab7197174153a718dedc97ff344341bcf6098 Nov 2011]<br />
|[https://github.com/zfsonlinux/zfs/commit/330d06f90d143b41b276796526a66a1c1fff046d Jul 2012]<br />
|[https://github.com/openzfsonosx/zfs/commit/330d06f90d143b41b276796526a66a1c1fff046d Jul 2012]<br />
|-<br />
|<tt>written@''<snap>''</tt><br />
|The amount of referenced space written to this dataset since the specified snapshot. This is the space referenced by this dataset, but not referenced by the specified snapshot.<br />
|[https://github.com/illumos/illumos-gate/commit/e5351341b58845eee9d722bd71543d5a7c26b6cc Nov 2011]<br />
|[https://github.com/freebsd/freebsd/commit/73cab7197174153a718dedc97ff344341bcf6098 Nov 2011]<br />
|[https://github.com/zfsonlinux/zfs/commit/330d06f90d143b41b276796526a66a1c1fff046d Jul 2012]<br />
|[https://github.com/openzfsonosx/zfs/commit/330d06f90d143b41b276796526a66a1c1fff046d Jul 2012]<br />
|-<br />
|<tt>logicalused</tt>, <tt>logicalreferenced</tt><br />
|The amount of space used or referenced, before taking into account compression.<br />
|[https://github.com/illumos/illumos-gate/commit/77372cb0f35e8d3615ca2e16044f033397e88e21 Feb 2013]<br />
|[https://github.com/freebsd/freebsd/commit/2bed8f5691b7572d6f31bfc68e9f762a938af863 Mar 2013]<br />
|not yet<br />
|not yet<br />
|-<br />
|}</div>Grahamperrinhttps://openzfs.org/w/index.php?title=Features&diff=1662Features2015-02-12T04:50:58Z<p>Grahamperrin: Alphabetical order. Treating the features in https://www.freebsd.org/cgi/man.cgi?query=zpool-features&sektion=7&manpath=FreeBSD+11-current as current; in https://openzfsonosx.org/forum/viewtopic.php?f=20&t=2147 as implemented</p>
<hr />
<div>This page describes some of the more important features and performance improvements that are part of OpenZFS.<br />
<br />
Help would be appreciated in porting features between platforms whose status is "not yet".<br />
<br />
== Feature Flags ==<br />
<br />
{| class="wikitable"<br />
|<br />
| '''illumos'''<br />
| '''FreeBSD'''<br />
| '''ZFS on Linux'''<br />
| '''OpenZFS on OS X'''<br />
|-<br />
| '''async_destroy'''<br />
| Y<br />
| Y<br />
| Y<br />
| Y<br />
|-<br />
| '''bookmarks'''<br />
| Y<br />
| S<br />
| N<br />
| Y<br />
|-<br />
| '''embedded_data'''<br />
| <br />
| C<br />
| <br />
| Y<br />
|-<br />
| '''empty_bpobj'''<br />
| Y<br />
| Y<br />
| Y<br />
| Y<br />
|-<br />
| '''enabled_txg'''<br />
| Y<br />
| S<br />
| N<br />
| Y<br />
|-<br />
| '''extensible_dataset'''<br />
| Y<br />
| S<br />
| N<br />
| Y<br />
|-<br />
| '''filesystem_limits'''<br />
| <br />
| C<br />
| <br />
| N<br />
|-<br />
| '''hole_birth'''<br />
| Y<br />
| S<br />
| N<br />
| Y<br />
|-<br />
| '''large_blocks'''<br />
| <br />
| <br />
| <br />
| N<br />
|-<br />
| '''lz4_compress'''<br />
| Y<br />
| Y<br />
| Y<br />
| Y<br />
|-<br />
| '''multi_vdev_crash_dump'''<br />
| Y<br />
| S<br />
| N<br />
| N<br />
|-<br />
| '''spacemap_histogram'''<br />
| Y<br />
| S<br />
| N<br />
| Y<br />
|}<br />
<br />
'''Table legends'''<br />
<br />
FreeBSD: <br />
* N = not implemented<br />
* C = implemented in -CURRENT<br />
* S = implemented in -CURRENT and -STABLE<br />
* Y = implemented in -RELEASE<br />
<br />
Other distributions: <br />
* N = not implemented<br />
* Y = implemented<br />
<br />
For greatest compatibility, features that are exclusive (when enabled) should be periodically ported to all other distributions.<br />
<br />
=== Background ===<br />
<br />
Originally the ZFS on-disk format was versioned with a single number that was increased whenever a new on-disk format change was introduced. This worked well when a single entity controlled the development of ZFS; however, in the more distributed development model of OpenZFS a single version number is not ideal. Every OpenZFS implementation would need to agree on every change to the on-disk format.<br />
<br />
One of the first OpenZFS projects was a new versioning system called "feature flags" that tags on-disk format changes with unique names. The system supports both completely independent format changes, as well as format changes that depend on each other. A pool's on-disk format is portable between OpenZFS implementations as long as all of the feature flags in use by the pool are supported by both implementations.<br />
<br />
For more details see these [http://blog.delphix.com/csiden/files/2012/01/ZFS_Feature_Flags.pdf slides (Jan 2012)] and [http://illumos.org/man/5/zpool-features <tt>zpool-features(5)</tt>] (illumos) or [http://www.freebsd.org/cgi/man.cgi?query=zpool-features&sektion=7&manpath=FreeBSD+11-current <tt>zpool-features(7)</tt>] (FreeBSD).<br />
<br />
== libzfs_core ==<br />
<br />
See this [http://blog.delphix.com/matt/2012/01/17/the-future-of-libzfs/ blog post (Jan 2012)] and associated [http://blog.delphix.com/matt/files/2012/01/The_Future_of_LibZFS.pdf slides] and [http://www.youtube.com/watch?feature=player_embedded&list=PL1A94C8EECCAF7340&v=iJ0S91ygErE video] for more details.<br />
<br />
First introduced in:<br />
{| class="wikitable"<br />
|-<br />
|'''illumos'''<br />
|[https://github.com/illumos/illumos-gate/commit/4445fffbbb1ea25fd0e9ea68b9380dd7a6709025 June 2012]<br />
|-<br />
|'''FreeBSD'''<br />
|[https://github.com/freebsd/freebsd/commit/f1985e5cd725ff1816cd4afbdee2d95b661883f0 March 2013]<br />
|-<br />
|'''ZFS on Linux'''<br />
|[https://github.com/zfsonlinux/zfs/commit/6f1ffb06655008c9b519108ed29fbf03acd6e5de August 2013]<br />
|-<br />
|'''OpenZFS on OS X'''<br />
|[https://github.com/openzfsonosx/zfs/commit/50b0b2d9ea604d29ed729be8fa61bb77ae3ff4e9 October 2013]<br />
|}<br />
<br />
== CLI Usability ==<br />
<br />
These are improvements to the command line interface. While the end result is a generally more friendly user interface, getting the desired behavior often required modifications to the core of ZFS.<br />
<br />
''Listed in chronological order (oldest first).''<br />
<br />
==== Pool Comment ====<br />
<br />
OpenZFS has a per-pool comment property which can be set with the <tt>zpool set</tt> command and can be read even if the pool is not imported, so it is accessible even if pool import fails.<br />
<br />
{| class="wikitable"<br />
|-<br />
|'''illumos'''<br />
|[https://github.com/illumos/illumos-gate/commit/8704186e373c9ed74daa395ff3f7fd745396df9e Nov 2011]<br />
|-<br />
|'''FreeBSD'''<br />
|[https://github.com/freebsd/freebsd/commit/73cab7197174153a718dedc97ff344341bcf6098 Nov 2011]<br />
|-<br />
|'''ZFS on Linux'''<br />
|[https://github.com/zfsonlinux/zfs/commit/d96eb2b1538db13ee7a716ec0e1162f5735edc12 Aug 2012]<br />
|-<br />
|'''OpenZFS on OS X'''<br />
|[https://github.com/openzfsonosx/zfs/commit/d96eb2b1538db13ee7a716ec0e1162f5735edc12 Aug 2012]<br />
|}<br />
<br />
==== Size Estimates for <tt>zfs send</tt> and <tt>zfs destroy</tt> ====<br />
<br />
This feature enhances OpenZFS's internal space accounting information. This new accounting information is used to provide a <tt>-n</tt> (dry-run) option for <tt>zfs send</tt> which can instantly calculate the amount of send stream data a specific <tt>zfs send</tt> command would generate. It is also used for a <tt>-n</tt> option for <tt>zfs destroy</tt> which can instantly calculate the amount of space that would be reclaimed by a specific <tt>zfs destroy</tt> command.<br />
<br />
{| class="wikitable"<br />
|-<br />
|'''illumos'''<br />
|[https://github.com/illumos/illumos-gate/commit/e5351341b58845eee9d722bd71543d5a7c26b6cc Nov 2011]<br />
|-<br />
|'''FreeBSD'''<br />
|[https://github.com/freebsd/freebsd/commit/73cab7197174153a718dedc97ff344341bcf6098 Nov 2011]<br />
|-<br />
|'''ZFS on Linux'''<br />
|[https://github.com/zfsonlinux/zfs/commit/330d06f90d143b41b276796526a66a1c1fff046d Jul 2012]<br />
|-<br />
|'''OpenZFS on OS X'''<br />
|[https://github.com/openzfsonosx/zfs/commit/330d06f90d143b41b276796526a66a1c1fff046d Jul 2012]<br />
|}<br />
<br />
==== vdev Information in <tt>zpool list</tt> ====<br />
<br />
OpenZFS adds a <tt>-v</tt> option to the <tt>zpool list</tt> command which shows detailed sizing information about the vdevs in the pool:<br />
<br />
$ zpool list -v<br />
NAME SIZE ALLOC FREE EXPANDSZ CAP DEDUP HEALTH ALTROOT<br />
dcenter 5.24T 3.85T 1.39T - 73% 1.00x ONLINE -<br />
mirror 556G 469G 86.7G -<br />
c2t1d0 - - - -<br />
c2t0d0 - - - -<br />
mirror 556G 493G 63.0G -<br />
c2t3d0 - - - -<br />
c2t2d0 - - - -<br />
mirror 556G 493G 62.7G -<br />
c2t5d0 - - - -<br />
c2t4d0 - - - -<br />
mirror 556G 494G 62.5G -<br />
c2t8d0 - - - -<br />
c2t6d0 - - - -<br />
mirror 556G 494G 62.2G -<br />
c2t10d0 - - - -<br />
c2t9d0 - - - -<br />
mirror 556G 494G 61.9G -<br />
c2t12d0 - - - -<br />
c2t11d0 - - - -<br />
mirror 1016G 507G 509G -<br />
c1t1d0 - - - -<br />
c1t5d0 - - - -<br />
mirror 1016G 496G 520G -<br />
c1t3d0 - - - -<br />
c1t4d0 - - - -<br />
<br />
{| class="wikitable"<br />
|-<br />
|'''illumos'''<br />
|[https://github.com/illumos/illumos-gate/commit/4263d13f00c9691fa14620eff82abef795be0693 Jan 2012]<br />
|-<br />
|'''FreeBSD'''<br />
|[https://github.com/freebsd/freebsd/commit/38ef930079cbb1df5de9df3c1064426dba3976b1 May 2012]<br />
|-<br />
|'''ZFS on Linux'''<br />
|[https://github.com/zfsonlinux/zfs/commit/1bd201e70d57464fd26bf9089ea4b44fd49e4f2d Sept 2012]<br />
|-<br />
|'''OpenZFS on OS X'''<br />
|[https://github.com/openzfsonosx/zfs/commit/1bd201e70d57464fd26bf9089ea4b44fd49e4f2d Sept 2012]<br />
|}<br />
<br />
==== ZFS list snapshot property alias ====<br />
<br />
Functionally identical to Solaris 11 extension <code>zfs list -t snap</code>.<br />
<br />
{| class="wikitable"<br />
|-<br />
|'''illumos'''<br />
|not yet<br />
|-<br />
|'''FreeBSD'''<br />
|[http://svnweb.freebsd.org/changeset/base/256999 Oct 2013]<br />
|-<br />
|'''ZFS on Linux'''<br />
|[https://github.com/zfsonlinux/zfs/commit/cf81b00a73fe47fdb21586ac1cc179b734540973 Apr 2012]<br />
|-<br />
|'''OpenZFS on OS X'''<br />
|[https://github.com/openzfsonosx/zfs/commit/cf81b00a73fe47fdb21586ac1cc179b734540973 Apr 2012]<br />
|}<br />
<br />
==== ZFS snapshot alias ====<br />
<br />
Functionally identical to Solaris 11 extension <code>zfs snap</code>.<br />
<br />
{| class="wikitable"<br />
|-<br />
|'''illumos'''<br />
|not yet<br />
|-<br />
|'''FreeBSD'''<br />
|[http://svnweb.freebsd.org/changeset/base/256999 Oct 2013]<br />
|-<br />
|'''ZFS on Linux'''<br />
|[https://github.com/zfsonlinux/zfs/commit/10b75496bb0cb7a7b8146c263164adc37f1d176a Apr 2012]<br />
|-<br />
|'''OpenZFS on OS X'''<br />
|[https://github.com/openzfsonosx/zfs/commit/10b75496bb0cb7a7b8146c263164adc37f1d176a Apr 2012]<br />
|}<br />
<br />
==== <tt>zfs send</tt> Progress Reporting ====<br />
<br />
OpenZFS introduces a <tt>-v</tt> option to <tt>zfs send</tt> which reports per-second information on how much data has been sent, how long it has taken, and how much data remains to be sent.<br />
<br />
{| class="wikitable"<br />
|-<br />
|'''illumos'''<br />
|[https://github.com/illumos/illumos-gate/commit/4e3c9f4489a18514e5e8caeb91d4e6db07c98415 May 2012]<br />
|-<br />
|'''FreeBSD'''<br />
|[https://github.com/freebsd/freebsd/commit/046ff8962602e8d65b6b3fae48573513ab7e433f May 2012]<br />
|-<br />
|'''ZFS on Linux'''<br />
|[https://github.com/zfsonlinux/zfs/commit/37abac6d559a1da8ab8e5379442f491b73998f6a Sept 2012]<br />
|-<br />
|'''OpenZFS on OS X'''<br />
|[https://github.com/openzfsonosx/zfs/commit/37abac6d559a1da8ab8e5379442f491b73998f6a Sept 2012]<br />
|}<br />
<br />
==== Arbitrary Snapshot Arguments to <tt>zfs snapshot</tt> ====<br />
<br />
{| class="wikitable"<br />
|-<br />
|'''illumos'''<br />
|[https://github.com/illumos/illumos-gate/commit/4445fffbbb1ea25fd0e9ea68b9380dd7a6709025 June 2012]<br />
|-<br />
|'''FreeBSD'''<br />
|[https://github.com/freebsd/freebsd/commit/f1985e5cd725ff1816cd4afbdee2d95b661883f0 March 2013]<br />
|-<br />
|'''ZFS on Linux'''<br />
|[https://github.com/zfsonlinux/zfs/commit/6f1ffb06655008c9b519108ed29fbf03acd6e5de August 2013]<br />
|-<br />
|'''OpenZFS on OS X'''<br />
|[https://github.com/openzfsonosx/zfs/commit/6f1ffb06655008c9b519108ed29fbf03acd6e5de September 2013]<br />
|}<br />
<br />
== Performance ==<br />
<br />
These are significant performance improvements, often requiring substantial restructuring of the source code.<br />
<br />
''Listed in chronological order (oldest first).''<br />
<br />
==== SA based xattrs ====<br />
<br />
Improves performance of linux-style (short) xattrs by storing them in the dnode_phys_t's bonus block. (Not to be confused with [http://en.wikipedia.org/wiki/Extended_file_attributes#Solaris Solaris-style Extended Attributes] which are full-fledged files or "forks", like NTFS streams. This work could be extended to also improve the performance on illumos of small Extended Attributes whose permissions are the same as the containing file.)<br />
<br />
Requires a disk format change and is off by default until Filesystem (ZPL) Feature Flags are implemented (not to be confused with [[Features#Feature_Flags_Overview | zpool Feature Flags]]).<br />
<br />
{| class="wikitable"<br />
|-<br />
|'''illumos'''<br />
|not yet (needs additional functionality)<br />
|-<br />
|'''FreeBSD'''<br />
|??<br />
|-<br />
|'''ZFS on Linux'''<br />
|[https://github.com/zfsonlinux/zfs/commit/82a37189aac955c81a59a5ecc3400475adb56355 Oct 2011]<br />
|-<br />
|'''OpenZFS on OS X'''<br />
|??<br />
|}<br />
<br />
Note that SA based xattrs are [https://github.com/zfsonlinux/zfs/commit/6a7c0ccca44ad02c476a111d8f7911fc8b12fff7 no longer used on symlinks] as of Aug 2013 until an issue is resolved.<br />
<br />
==== Use the slog even with logbias=throughput ====<br />
<br />
{| class="wikitable"<br />
|-<br />
|'''illumos'''<br />
|??<br />
|-<br />
|'''FreeBSD'''<br />
|??<br />
|-<br />
|'''ZFS on Linux'''<br />
|[https://github.com/zfsonlinux/zfs/commit/5d7a86d114c2706a8d14d94b71f81ad5cdf066c5 Oct 2011]<br />
|-<br />
|'''OpenZFS on OS X'''<br />
|[https://github.com/openzfsonosx/zfs/commit/5d7a86d114c2706a8d14d94b71f81ad5cdf066c5 Oct 2011]<br />
|}<br />
<br />
==== Asynchronous Filesystem and Volume Destruction ====<br />
<br />
Destroying a filesystem requires traversing all of its data in order to return its used blocks to the pool's free list. Before this feature the filesystem was not fully removed until all blocks had been reclaimed. If the destroy operation was interrupted by a reboot or power outage the next attempt to import the pool (probably during boot) would need to complete the destroy operation synchronously, possibly delaying a boot for long periods of time.<br />
<br />
With asynchronous destruction the filesystem's data is immediately moved to a "to be freed" list, allowing the destroy operation to complete without traversing any of the filesystem's data. A background process reclaims blocks from this "to be freed" list and is capable of resuming this process after reboots without slowing the pool import process.<br />
<br />
The new freeing algorithm also has a significant performance improvement when destroying clones. The old algorithm took time proportional to the number of blocks ''referenced'' by the clone, even if most of those blocks could not be reclaimed because they were still referenced by the clone's origin. The new algorithm only takes time proportional to the number of blocks unique to the clone.<br />
<br />
See this [http://blog.delphix.com/matt/2012/07/11/performance-of-zfs-destroy/ blog post] for more detailed performance analysis.<br />
<br />
Note: The <tt>async_destroy</tt> feature flag must be enabled to take advantage of this.<br />
<br />
{| class="wikitable"<br />
|-<br />
|'''illumos'''<br />
|[https://github.com/illumos/illumos-gate/commit/ad135b5d644628e791c3188a6ecbd9c257961ef8 May 2012]<br />
|-<br />
|'''FreeBSD'''<br />
|[https://github.com/freebsd/freebsd/commit/cc61ab2f133566dca51970d44cc49a4355039b5d June 2012]<br />
|-<br />
|'''ZFS on Linux'''<br />
|[https://github.com/zfsonlinux/zfs/commit/9ae529ec5dbdc828ff8326beae58062971d74b2e Jan 2013]<br />
|-<br />
|'''OpenZFS on OS X'''<br />
|[https://github.com/openzfsonosx/zfs/commit/9ae529ec5dbdc828ff8326beae58062971d74b2e Jan 2013]<br />
|}<br />
<br />
==== Reduce Number of Empty bpobjs ====<br />
<br />
Every time OpenZFS takes a snapshot it creates on-disk block pointer objects (bpobj's) to track blocks associated with that snapshot. In common use cases most of these bpobj's are empty, but the number of bpobjs per-snapshot is proportional to the number of snapshots already taken of the same filesystem or volume. When a single filesystem or volume has many (tens of thousands) snapshots these unecessary empty bpobjs can waste space and cause performance problems. OpenZFS waits to create each bpobjs until the first entry is added to it, thus eliminating the empty bpobjs.<br />
<br />
Note: The <tt>empty_bpobj</tt> feature flag must be enabled to take advantage of this.<br />
<br />
{| class="wikitable"<br />
|-<br />
|'''illumos'''<br />
|[https://github.com/illumos/illumos-gate/commit/f17457368189aa911f774c38c1f21875a568bdca Aug 2012]<br />
|-<br />
|'''FreeBSD'''<br />
|[https://github.com/freebsd/freebsd/commit/d9fa2f486ee98b2557e1d5ad5f1af418c663cfc8 Aug 2012]<br />
|-<br />
|'''ZFS on Linux'''<br />
|[https://github.com/zfsonlinux/zfs/commit/753c38392ddff9d3cf140bb4d28f3bfba52c92d2 Dec 2012]<br />
|-<br />
|'''OpenZFS on OS X'''<br />
|[https://github.com/openzfsonosx/zfs/commit/753c38392ddff9d3cf140bb4d28f3bfba52c92d2 Dec 2012]<br />
|}<br />
<br />
==== Single Copy ARC ====<br />
<br />
OpenZFS caches disk blocks in-memory in the adaptive replacement cache (ARC). Originally when the same disk block was accessed from different clones it was cached multiple times (one for each clone accessing the block) in case a clone planned to modify the block. With these changes OpenZFS caches at most one copy of every block unless a clone is actually modifying the block.<br />
<br />
{| class="wikitable"<br />
|-<br />
|'''illumos'''<br />
|[https://github.com/illumos/illumos-gate/commit/9253d63df408bb48584e0b1abfcc24ef2472382e Sep 2012]<br />
|-<br />
|'''FreeBSD'''<br />
|[https://github.com/freebsd/freebsd/commit/8e1fdec2c76a948b16ebf8e4abe2cb73a60d3477 Nov 2012]<br />
|-<br />
|'''ZFS on Linux'''<br />
|[https://github.com/zfsonlinux/zfs/commit/1eb5bfa3dcdaecb19543d9df13131374a7a42947 Dec 2012]<br />
|-<br />
|'''OpenZFS on OS X'''<br />
|[https://github.com/openzfsonosx/zfs/commit/1eb5bfa3dcdaecb19543d9df13131374a7a42947 Dec 2012]<br />
|}<br />
<br />
==== TRIM Support ====<br />
<br />
TRIM support provides the ability to pass deletes / frees through to underlying vdevs that help to ensure devices such as SSD's, which rely on receiving TRIM / UNMAP requests for sectors which are no longer needed, maintain optimal performance.<br />
<br />
The current FreeBSD implementation builds a map of regions that were freed. On every write the<br />
code consults the map and removes ranges that were freed before, but are now overwritten.<br />
<br />
Freed blocks are not TRIMed immediately, there is a low priority thread that TRIMs ranges when the time comes.<br />
<br />
Support for TRIM has been demonstrated to significantly improved the general performance of SSD in the field, eliminating the need for regular secure erase cycles on busy hosts.<br />
<br />
An alternative method, which is arguably better, and works by tracking the metaslab allocator is also in progress and can be found here:<br />
[http://cr.illumos.org/~webrev/skiselkov/zfs_unmap/ ZFS TRIM Support for illumos]<br />
<br />
There is [https://github.com/zfsonlinux/zfs/pull/1016 a pull request for ZFS On Linux] which implements FreeBSD's (Sep 2012) ZFS TRIM support.<br />
<br />
{| class="wikitable"<br />
|-<br />
|'''illumos'''<br />
|not yet ported<br />
|-<br />
|'''FreeBSD'''<br />
|[http://svnweb.freebsd.org/base?view=revision&sortby=file&revision=240868 Sep 2012]<br />
|-<br />
|'''ZFS on Linux'''<br />
|not yet ported<br />
|-<br />
|'''OpenZFS on OS X'''<br />
|not yet ported<br />
|}<br />
<br />
==== FASTWRITE Algorithm ====<br />
<br />
Improves synchronous IO performance.<br />
<br />
{| class="wikitable"<br />
|-<br />
|'''illumos'''<br />
|not yet ported<br />
|-<br />
|'''FreeBSD'''<br />
|not yet ported<br />
|-<br />
|'''ZFS on Linux'''<br />
|[https://github.com/zfsonlinux/zfs/commit/920dd524fb2997225d4b1ac180bcbc14b045fda6 Oct 2012]<br />
|-<br />
|'''OpenZFS on OS X'''<br />
|[https://github.com/openzfsonosx/zfs/commit/920dd524fb2997225d4b1ac180bcbc14b045fda6 Oct 2012]<br />
|}<br />
<br />
Note that a [https://github.com/ryao/zfs/commit/858822a04b4563657b2267131e90d9687d67e31b locking enhancement] is being reviewed.<br />
<br />
==== Block Freeing Performance Improvments ====<br />
<br />
Performance analysis of OpenZFS revealed that the algorithms used when freeing blocks could cause significant performance problems when freeing a large amount of blocks in a single transaction or when dealing with fragmented pools. Several performance improvements were made in this area.<br />
<br />
{| class="wikitable"<br />
|-<br />
|'''illumos'''<br />
|[https://github.com/illumos/illumos-gate/commit/01f55e48fb4d524eaf70687728aa51b7762e2e97 Nov 2012]<br />
|[https://github.com/illumos/illumos-gate/commit/16a4a8074274d2d7cc408589cf6359f4a378c861 Feb 2013]<br />
|[https://github.com/illumos/illumos-gate/commit/9eb57f7f3fbb970d4b9b89dcd5ecf543fe2414d5 Feb 2013]<br />
|-<br />
|'''FreeBSD'''<br />
|[https://github.com/freebsd/freebsd/commit/5d9b3f284b13ac492326e05f6ba4c00e98adf05c Nov 2012]<br />
|[https://github.com/freebsd/freebsd/commit/18e9a0422b52091035dae9d69bde9dd571a8ff7e Feb 2013]<br />
|[https://github.com/freebsd/freebsd/commit/18e9a0422b52091035dae9d69bde9dd571a8ff7e Feb 2013]<br />
|-<br />
|'''ZFS on Linux'''<br />
|[https://github.com/zfsonlinux/zfs/commit/55d85d5a8c45c4559a4a0e675c37b0c3afb19c2f May 2013]<br />
|[https://github.com/zfsonlinux/zfs/commit/e51be06697762215dc3b679f8668987034a5a048 June 2013]<br />
|not yet<br />
|-<br />
|'''OpenZFS on OS X'''<br />
|[https://github.com/openzfsonosx/zfs/commit/55d85d5a8c45c4559a4a0e675c37b0c3afb19c2f May 2013]<br />
|[https://github.com/openzfsonosx/zfs/commit/e51be06697762215dc3b679f8668987034a5a048 June 2013]<br />
|not yet<br />
|}<br />
<br />
==== nop-write ====<br />
<br />
ZFS supports end-to-end checksumming of every data block. When a cryptographically secure checksum is being used OpenZFS will compare the checksums of incoming writes to checksum of the existing on-disk data and avoid issuing any write i/o for data that has not changed. This can help performance and snapshot space usage in situations were the same files are regularly overwritten with almost-identical data (e.g. regular full-backups of large random-access files).<br />
<br />
{| class="wikitable"<br />
|-<br />
|'''illumos'''<br />
|[https://github.com/illumos/illumos-gate/commit/80901aea8e78a2c20751f61f01bebd1d5b5c2ba5 Nov 2012]<br />
|-<br />
|'''FreeBSD'''<br />
|[https://github.com/freebsd/freebsd/commit/3a0bfecf052237768517963f169d0797e2978f59 Nov 2012]<br />
|-<br />
|'''ZFS on Linux'''<br />
|[https://github.com/zfsonlinux/zfs/commit/03c6040bee6c87a9413b7da41d9f580f79a8ab62 Nov 2013]<br />
|-<br />
|'''OpenZFS on OS X'''<br />
|not yet<br />
|}<br />
<br />
==== lz4 compression ====<br />
<br />
OpenZFS supports on-the-fly compression of all user data with a variety of compression algorithm. This feature adds support for the lz4 compression algorithm. lz4 is usually faster and compresses data better than lzjb, the old default OpenZFS compression algorithm.<br />
<br />
Note: The <tt>lz4_compress</tt> feature flag must be enabled to take advantage of this.<br />
<br />
{| class="wikitable"<br />
|-<br />
|'''illumos'''<br />
|[https://github.com/illumos/illumos-gate/commit/a6f561b4aee75d0d028e7b36b151c8ed8a86bc76 Jan 2013]<br />
|-<br />
|'''FreeBSD'''<br />
|[https://github.com/freebsd/freebsd/commit/c6d9dc1ad2d2e36220845b84a2d180bd97354797 Feb 2013]<br />
|-<br />
|'''ZFS on Linux'''<br />
|[https://github.com/zfsonlinux/zfs/commit/9759c60f1a1503e48dc5c45a209c3edd5758319f Jan 2013]<br />
|-<br />
|'''OpenZFS on OS X'''<br />
|[https://github.com/openzfsonosx/zfs/commit/9759c60f1a1503e48dc5c45a209c3edd5758319f Jan 2013]<br />
|}<br />
<br />
==== synctask rewrite ====<br />
<br />
{| class="wikitable"<br />
|-<br />
|'''illumos'''<br />
|[https://github.com/illumos/illumos-gate/commit/3b2aab18808792cbd248a12f1edf139b89833c13 Feb 2013]<br />
|-<br />
|'''FreeBSD'''<br />
|[https://github.com/freebsd/freebsd/commit/f1985e5cd725ff1816cd4afbdee2d95b661883f0 March 2013]<br />
|-<br />
|'''ZFS on Linux'''<br />
|[https://github.com/zfsonlinux/zfs/commit/13fe019870c8779bf2f5b3ff731b512cf89133ef Sept 2013]<br />
|-<br />
|'''OpenZFS on OS X'''<br />
|[https://github.com/openzfsonosx/zfs/commit/13fe019870c8779bf2f5b3ff731b512cf89133ef Sept 2013]<br />
|}<br />
<br />
==== l2arc compression ====<br />
<br />
{| class="wikitable"<br />
|-<br />
|'''illumos'''<br />
|[https://github.com/illumos/illumos-gate/commit/aad02571bc59671aa3103bb070ae365f531b0b62 Jun 2013]<br />
|-<br />
|'''FreeBSD'''<br />
|[https://github.com/freebsd/freebsd/commit/b20363fe596a7e3a55d5b62f4d3fdb482c65c47a Jun 2013]<br />
|-<br />
|'''ZFS on Linux'''<br />
|[https://github.com/zfsonlinux/zfs/commit/3a17a7a99a1a6332d0999f9be68e2b8dc3933de1 Aug 2013]<br />
|-<br />
|'''OpenZFS on OS X'''<br />
|[https://github.com/openzfsonosx/zfs/commit/3a17a7a99a1a6332d0999f9be68e2b8dc3933de1 Aug 2013]<br />
|}<br />
<br />
==== ARC Shouldn't Cache Freed Blocks ====<br />
<br />
Originally cached blocks in the ARC remained cached until they were evicted due to memory pressure, even if the underlying disk block was freed. In some workloads these freed blocks were so frequently accessed before they were freed that the ARC continued to cache them while evicting blocks which had not been freed yet. Since freed blocks could never be accessed again continuing to cache them was unnecessary. In OpenZFS ARC blocks are evicted immediately when their underlying data blocks are freed.<br />
<br />
{| class="wikitable"<br />
|-<br />
|'''illumos'''<br />
|[https://github.com/illumos/illumos-gate/commit/6e6d5868f52089b9026785bd90257a3d3f6e5ee2 Jun 2013]<br />
|-<br />
|'''FreeBSD'''<br />
|[https://github.com/freebsd/freebsd/commit/13d822743426263ee50bcf047ab41a1e386156a8 Jun 2013]<br />
|-<br />
|'''ZFS on Linux'''<br />
|[https://github.com/zfsonlinux/zfs/commit/df4474f92d0b1b8d54e1914fdd56be2b75f1ff5e Jun 2013]<br />
|-<br />
|'''OpenZFS on OS X'''<br />
|[https://github.com/openzfsonosx/zfs/commit/df4474f92d0b1b8d54e1914fdd56be2b75f1ff5e Jun 2013]<br />
|}<br />
<br />
==== Improve N-way mirror read performance ====<br />
<br />
Queues read requests to least busy leaf vdev in mirrors.<br />
<br />
In addition to the vdev load biasing first implemented by ZFS on Linux in July 2013, the FreeBSD October 2013 version added I/O locality and device rotational information to further enhance the performance.<br />
<br />
{| class="wikitable"<br />
!OS<br />
!Load<br />
!Load + I/O Locality & Rotational Information<br />
|-<br />
|'''illumos'''<br />
|not yet ported<br />
|not yet ported<br />
|-<br />
|'''FreeBSD'''<br />
|N/A<br />
|[http://svnweb.freebsd.org/changeset/base/256956 23rd October 2013]<br />
|-<br />
|'''ZFS on Linux'''<br />
|[https://github.com/zfsonlinux/zfs/commit/556011dbec2d10579819078559a77630fc559112 Jul 2013]<br />
|not yet ported<br />
|-<br />
|'''OpenZFS on OS X'''<br />
|[https://github.com/openzfsonosx/zfs/commit/556011dbec2d10579819078559a77630fc559112 Jul 2013]<br />
|not yet ported<br />
|}<br />
<br />
==== Smoother Write Throttle ====<br />
<br />
The write throttle (dsl_pool_tempreserve_space() and txg_constrain_throughput()) is rewritten to produce much more consistent delays when under constant load. The new write throttle is based on the amount of dirty data, rather than guesses about future performance of the system. When there is a lot of dirty data, each transaction (e.g. write() syscall) will be delayed by the same small amount. This eliminates the "brick wall of wait" that the old write throttle could hit, causing all transactions to wait several seconds until the next txg opens. One of the keys to the new write throttle is decrementing the amount of dirty data as i/o completes, rather than at the end of spa_sync(). Note that the write throttle is only applied once the i/o scheduler is issuing the maximum number of outstanding async writes. See the block comments in dsl_pool.c and above dmu_tx_delay() for more details.<br />
<br />
The ZFS i/o scheduler (vdev_queue.c) now divides i/os into 5 classes: sync read, sync write, async read, async write, and scrub/resilver. The scheduler issues a number of concurrent i/os from each class to the device. Once a class has been selected, an i/o is selected from this class using either an elevator algorithem (async, scrub classes) or FIFO (sync classes). The number of concurrent async write i/os is tuned dynamically based on i/o load, to achieve good sync i/o latency when there is not a high load of writes, and good write throughput when there is. See the block comment in vdev_queue.c for more details.<br />
<br />
{| class="wikitable"<br />
|-<br />
|'''illumos'''<br />
|[https://github.com/illumos/illumos-gate/commit/69962b5647e4a8b9b14998733b765925381b727e Aug 2013]<br />
|-<br />
|'''FreeBSD'''<br />
|[http://svnweb.freebsd.org/changeset/base/258632 Nov 2013]<br />
|-<br />
|'''ZFS on Linux'''<br />
|[https://github.com/zfsonlinux/zfs/commit/e8b96c6007bf97cdf34869c1ffbd0ce753873a3d Dec 2013]<br />
|-<br />
|'''OpenZFS on OS X'''<br />
|not yet<br />
|}<br />
<br />
== Dataset Properties ==<br />
<br />
These are new filesystem, volume, and snapshot properties which can be accessed with the <tt>zfs(1)</tt> command's <tt>get</tt> subcommand. See the <tt>zfs(1)</tt> manpage for your distribution for more details on each of these properties.<br />
<br />
{| class="wikitable"<br />
!Property<br />
!Description<br />
!illumos<br />
!FreeBSD<br />
!ZFS on Linux<br />
!OpenZFS on OS X<br />
|-<br />
|<tt>refcompressratio</tt><br />
|The compression ratio acheived for all data referenced by (but not necessarily unique to) a snapshot, filesystem, or volume, expressed as a multiplier.<br />
|[https://github.com/illumos/illumos-gate/commit/187d6ac08adc31ea6868bde0cfbbb288826254e8 Jun 2011]<br />
|[https://github.com/freebsd/freebsd/commit/333e34b938a2b5e7b036e02b36408880b415109c Jun 2011]<br />
|[https://github.com/zfsonlinux/zfs/commit/77999e804fff35782ab4b578d2cecf064c54a841 Aug 2012]<br />
|[https://github.com/openzfsonosx/zfs/commit/77999e804fff35782ab4b578d2cecf064c54a841 Aug 2012]<br />
|-<br />
|<tt>clones</tt><br />
|For snapshots, this property is a comma-separated list of filesystems or volumes which are clones of this snapshot.<br />
|[https://github.com/illumos/illumos-gate/commit/e5351341b58845eee9d722bd71543d5a7c26b6cc Nov 2011]<br />
|[https://github.com/freebsd/freebsd/commit/73cab7197174153a718dedc97ff344341bcf6098 Nov 2011]<br />
|[https://github.com/zfsonlinux/zfs/commit/330d06f90d143b41b276796526a66a1c1fff046d Jul 2012]<br />
|[https://github.com/openzfsonosx/zfs/commit/330d06f90d143b41b276796526a66a1c1fff046d Jul 2012]<br />
|-<br />
|<tt>written</tt><br />
|The amount of referenced space written to this dataset since the previous snapshot.<br />
|[https://github.com/illumos/illumos-gate/commit/e5351341b58845eee9d722bd71543d5a7c26b6cc Nov 2011]<br />
|[https://github.com/freebsd/freebsd/commit/73cab7197174153a718dedc97ff344341bcf6098 Nov 2011]<br />
|[https://github.com/zfsonlinux/zfs/commit/330d06f90d143b41b276796526a66a1c1fff046d Jul 2012]<br />
|[https://github.com/openzfsonosx/zfs/commit/330d06f90d143b41b276796526a66a1c1fff046d Jul 2012]<br />
|-<br />
|<tt>written@''<snap>''</tt><br />
|The amount of referenced space written to this dataset since the specified snapshot. This is the space referenced by this dataset, but not referenced by the specified snapshot.<br />
|[https://github.com/illumos/illumos-gate/commit/e5351341b58845eee9d722bd71543d5a7c26b6cc Nov 2011]<br />
|[https://github.com/freebsd/freebsd/commit/73cab7197174153a718dedc97ff344341bcf6098 Nov 2011]<br />
|[https://github.com/zfsonlinux/zfs/commit/330d06f90d143b41b276796526a66a1c1fff046d Jul 2012]<br />
|[https://github.com/openzfsonosx/zfs/commit/330d06f90d143b41b276796526a66a1c1fff046d Jul 2012]<br />
|-<br />
|<tt>logicalused</tt>, <tt>logicalreferenced</tt><br />
|The amount of space used or referenced, before taking into account compression.<br />
|[https://github.com/illumos/illumos-gate/commit/77372cb0f35e8d3615ca2e16044f033397e88e21 Feb 2013]<br />
|[https://github.com/freebsd/freebsd/commit/2bed8f5691b7572d6f31bfc68e9f762a938af863 Mar 2013]<br />
|not yet<br />
|not yet<br />
|-<br />
|}</div>Grahamperrinhttps://openzfs.org/w/index.php?title=Publications&diff=1469Publications2014-06-08T19:46:10Z<p>Grahamperrin: Kris Moore talk scheduled http://webcache.googleusercontent.com/search?q=cache:dcC41pjYaD4J:www.bsdcan.org/2014/schedule/day_2014-05-17.en.html+&cd=2&hl=en&ct=clnk&gl=uk but did not occur http://www.bsdcan.org/2014/schedule/day_2014-05-17.en.html</p>
<hr />
<div>References to OpenZFS related publications and conference talk recordings.<br />
<br />
== Publications ==<br />
=== BSD ===<br />
{| class="wikitable"<br />
!Title!!Author!!Publication!!Issue!!Page!!Link<br />
|-<br />
|Tuning ZFS on FreeBSD||Martin Matuška||BSD Magazine||issue 08/2012(37)||p. 10-15||[http://bsdmag.org/magazine/1809-tuning-zfs-on-freebsd download]<br />
|-<br />
|ZFS and FreeBSD||Martin Matuška||BSD Magazine||issue 02/2011(19)||p. 10-13||[http://bsdmag.org/magazine/1638-zfs-and-freebsd download]<br />
|-<br />
|OpenZFS||Matt Ahrens||AsiaBSDcon proceedings||2014||||[http://www.open-zfs.org/w/images/0/0f/AsiaBSDcon_paper.pdf download]<br />
|}<br />
<br />
== Conference talks ==<br />
Most recent talks are at the bottom.<br />
<br />
=== ZFS Day 2012 ===<br />
[http://zfsday.com/zfsday/ ZFS Day], October 2, 2012, San Francisco, CA<br />
{| class="wikitable"<br />
!Title!!Speaker!!Slides!!Video<br />
|-<br />
|ZFS State of the Union||Matt Ahrens||[http://zfsday.com/wp-content/uploads/2012/08/ZFS-Day-Matt-Ahrens.pdf slides]||[http://zfsday.com/zfsday/zfs-state-of-the-union-matt-ahrens/ video]<br />
|-<br />
|Making the Impossible Possible: Disposable Staging Environments At Scale||Eric Sproul||[http://zfsday.com/wp-content/uploads/2012/08/Disposable_Envs_at_Scale-1.pdf slides]||[http://zfsday.com/zfsday/making-the-impossible-possible-disposable-staging-environments-at-scale/ video]<br />
|-<br />
|Running Without a ZFS Root Pool||Bill Pijewski||[http://zfsday.com/wp-content/uploads/2012/08/zfsday_100212.pdf slides]||[http://zfsday.com/zfsday/running-without-a-zfs-root-pool/ video]<br />
|-<br />
|Productizing ZFS||Justin Gibbs, Will Andrews||||[http://zfsday.com/zfsday/productizing-zfs/ video]<br />
|-<br />
|ZFS for Linux Implementation||Brian Behlendorf||||[http://zfsday.com/zfsday/zfs-for-linux-implementation/ video]<br />
|-<br />
|Panel: The State of ZFS on...||||||[http://zfsday.com/zfsday/panel-the-state-of-zfs-on/ video]<br />
|-<br />
|ZFS Performance Analysis and Tools||Brendan Gregg||[http://www.slideshare.net/brendangregg/zfsperftools2012 slides]||[http://zfsday.com/zfsday/zfs-performance-analysis-and-tools/ video]<br />
|-<br />
|Architecting ZFS Solutions||Richard Elling||||[http://zfsday.com/zfsday/architecting-zfs-solutions/ video]<br />
|-<br />
|Hybrid Storage Pools: Using Disk and Flash with ZFS||Adam Leventhal||||[http://zfsday.com/zfsday/hybrid-storage-pools-using-disk-and-flash-with-zfs/ video]<br />
|-<br />
|ZFS: Darwin's Storage||Jonathan Halstuch||[http://www.racktopsystems.com/wp-content/uploads/2012/10/Darwins-storage-ZFS.pdf slides]||[http://zfsday.com/zfsday/zfs-darwins-storage/ video]<br />
|-<br />
|Y4K?||George Wilson||[http://zfsday.com/wp-content/uploads/2012/08/Why-4k_.pdf slides]||[http://zfsday.com/zfsday/y4k/ video]<br />
|}<br />
<br />
=== 2013 [[OpenZFS Developer Summit]] ===<br />
<br />
November 18th 2013, San Francisco<br />
<br />
{| class="wikitable"<br />
!Title!!Speaker!!Slides!!Video<br />
|-<br />
|Introduction||Matt Ahrens||[http://www.slideshare.net/MatthewAhrens/open-zfs-devsummit slides]||[https://www.youtube.com/watch?v=U3dMhpmQTrU&list=PLaUVvul17xSdWMBt5tAC8Hu7bbeWskD_q video]<br />
|-<br />
|Platform Panel||Brian Behlendorf, Jorgen Lundman, Chris Siden, Xin Li||-||[https://www.youtube.com/watch?v=U3dMhpmQTrU&list=PLaUVvul17xSdWMBt5tAC8Hu7bbeWskD_q video]<br />
|-<br />
|Platform-independent code repository||Matt Ahrens||[http://www.slideshare.net/MatthewAhrens/openzfs-code-repository slides]||[https://www.youtube.com/watch?v=U3dMhpmQTrU&list=PLaUVvul17xSdWMBt5tAC8Hu7bbeWskD_q video]<br />
|-<br />
|Storage Tiering||Boris Protopopov||[http://www.open-zfs.org/w/images/7/71/ZFS_tiering.pdf slides]||[https://www.youtube.com/watch?v=tm0NYEVS6qM&list=PLaUVvul17xSdWMBt5tAC8Hu7bbeWskD_q video]<br />
|-<br />
|Vendor Lightning Talks||Many||-||[https://www.youtube.com/watch?v=EGKek5sZ2Xw&list=PLaUVvul17xSdWMBt5tAC8Hu7bbeWskD_q video]<br />
|-<br />
|Community Planning||Karyn Ritter||[https://docs.google.com/presentation/d/1LCvQxcNSxUi-5-NUgVRKp68iMLOrepp1VRJxPrklBPY/pub?start=false&loop=false&delayms=3000 slides]||[https://www.youtube.com/watch?v=EGKek5sZ2Xw&list=PLaUVvul17xSdWMBt5tAC8Hu7bbeWskD_q video]<br />
|-<br />
|Channel Programs||Chris Siden, Max Grossman||[http://www.slideshare.net/MatthewAhrens/openzfs-channel-programs slides]||[https://www.youtube.com/watch?v=EGKek5sZ2Xw&list=PLaUVvul17xSdWMBt5tAC8Hu7bbeWskD_q video]<br />
|-<br />
|Test Coverage||John Kennedy||[http://www.slideshare.net/jwk404/open-zfs-111813-28528303 slides]||[https://www.youtube.com/watch?v=M5RnPZW0_Xk&list=PLaUVvul17xSdWMBt5tAC8Hu7bbeWskD_q video]<br />
|-<br />
|Performance Investigation||Adam Leventhal||[http://www.slideshare.net/ahl0003/openzfs-datadriven-performance slides]||[https://www.youtube.com/watch?v=w3-eppY7ICc&list=PLaUVvul17xSdWMBt5tAC8Hu7bbeWskD_q video]<br />
|-<br />
|Performance on full & fragmented pools||George Wilson||[http://www.slideshare.net/gw25295/pool-performance-28609362 slides]||[https://www.youtube.com/watch?v=UuscV_fSncY&list=PLaUVvul17xSdWMBt5tAC8Hu7bbeWskD_q video]<br />
|-<br />
|Scalability|| Kirill Davydychev ||-||[https://www.youtube.com/watch?v=hvoL6z8YKgM&list=PLaUVvul17xSdWMBt5tAC8Hu7bbeWskD_q video]<br />
|-<br />
|Virtual Memory Interactions|| Brian Behlendorf ||-||[https://www.youtube.com/watch?v=hvoL6z8YKgM&list=PLaUVvul17xSdWMBt5tAC8Hu7bbeWskD_q video]<br />
|-<br />
|Multi Tenancy|| Rob Mustacchi ||-||[https://www.youtube.com/watch?v=MLTX1i7UEL4&list=PLaUVvul17xSdWMBt5tAC8Hu7bbeWskD_q video]<br />
|-<br />
|Examining On-disk Format|| Max Bruning ||-||[https://www.youtube.com/watch?v=MLTX1i7UEL4&list=PLaUVvul17xSdWMBt5tAC8Hu7bbeWskD_q video]<br />
|}<br />
<br />
=== 2014 [http://www.meetup.com/OpenZFS-Europe OpenZFS European Conference] ===<br />
<br />
May 20th, 2014, Paris<br />
<br />
{| class="wikitable"<br />
!Title!!Speaker!!Slides!![http://www.youtube.com/playlist?list=PLaUVvul17xScyhIYmGjaNaGSWI49qyf6K Video]<br />
|-<br />
|Introduction||Matt Ahrens||[http://www.open-zfs.org/w/images/c/ca/Matt_Ahrens_-_OpenZFS_-_Europe.pdf slides]||[http://www.youtube.com/watch?v=Mk1czZs6vkQ&index=5&list=PLaUVvul17xScyhIYmGjaNaGSWI49qyf6K video]<br />
|-<br />
|FhGFS performance on ZFS||Michael Alexander||[http://www.open-zfs.org/w/images/6/62/TU_Wien_Vienna_-_FhGFS_over_ZFS_Performance.pdf slides]||[http://www.youtube.com/watch?v=Ak1HB507-xY&index=10&list=PLaUVvul17xScyhIYmGjaNaGSWI49qyf6K video]<br />
|-<br />
|Testing ZFS on FreeBSD||Andriy Gapon||[http://www.open-zfs.org/w/images/9/98/Andriy_-_FreeBSD_Dev_Talk.pdf slides]||[http://www.youtube.com/watch?v=oB-QDwVuBH4&index=8&list=PLaUVvul17xScyhIYmGjaNaGSWI49qyf6K video]<br />
|-<br />
|HybridCluster: ZFS in the cloud||Luke Marsden||[http://www.open-zfs.org/w/images/3/3b/HybridCluster_Dev_Talk.pdf slides]||[http://www.youtube.com/watch?v=ISI9Ppj3kTo&index=7&list=PLaUVvul17xScyhIYmGjaNaGSWI49qyf6K video]<br />
|-<br />
|Syneto: continuously delivering a ZFS-based OS||Vadim Comănescu||[http://www.open-zfs.org/w/images/f/f5/Syneto_-_Continuously_Deploying_a_ZFS_based_OS.pdf slides]||[http://www.youtube.com/watch?v=1xK94v0BedE&list=PLaUVvul17xScyhIYmGjaNaGSWI49qyf6K&index=12 video]<br />
|-<br />
|DDRdrive ZIL accelerator: random write revelation||Chris George||[http://www.open-zfs.org/w/images/9/98/DDRdrive_zil_rw_revelation.pdf slides]||[http://www.youtube.com/watch?v=ScNHjWBQYQ8&index=6&list=PLaUVvul17xScyhIYmGjaNaGSWI49qyf6K video]<br />
|-<br />
|High-Availability||Grenville Whelan||[http://www.open-zfs.org/w/images/a/a7/High_Availability_-_Introduction.pdf slides]||[http://www.youtube.com/watch?v=tiTYZykCeDo&index=14&list=PLaUVvul17xScyhIYmGjaNaGSWI49qyf6K video]<br />
|-<br />
|Harman Holistic||Phil Harman||||[https://www.youtube.com/watch?v=ApjkrBVlPXk&index=15&list=PLaUVvul17xScyhIYmGjaNaGSWI49qyf6K video]<br />
|-<br />
|Storiant and OpenZFS||Mark Rees||||[http://www.youtube.com/watch?v=41yl23EACns&index=13&list=PLaUVvul17xScyhIYmGjaNaGSWI49qyf6K video]<br />
|-<br />
|EraStor ZFS appliances||Andrew Holway||[http://www.open-zfs.org/w/images/7/73/EraStor_-_Introduction_to_EraStor_Appliances.pdf slides]||[http://www.youtube.com/watch?v=b4L0DRvKJxo&index=9&list=PLaUVvul17xScyhIYmGjaNaGSWI49qyf6K video]<br />
|-<br />
|Syneto and OpenZFS||Dan Vâtca||[http://www.open-zfs.org/w/images/6/6b/Syneto_-_Introducing_StorageOS_and_ZFS.pdf slides]||[http://www.youtube.com/watch?v=pPOW8bwUXxo&index=5&list=PLaUVvul17xScyhIYmGjaNaGSWI49qyf6K video]<br />
|-<br />
|HybridCluster and OpenZFS||Luke Marsden||[http://www.open-zfs.org/w/images/3/33/HybridCluster_-_lightning_talk.pdf slides]||[http://www.youtube.com/watch?v=uSM1s1aWlZE&index=2&list=PLaUVvul17xScyhIYmGjaNaGSWI49qyf6K video]<br />
|-<br />
|Delphix and OpenZFS||Matt Ahrens||[http://www.open-zfs.org/w/images/4/46/Delphix_-_Introduction.pdf slides]||[http://www.youtube.com/watch?v=UaRdzUOsieA&index=3&list=PLaUVvul17xScyhIYmGjaNaGSWI49qyf6K video]<br />
|}<br />
<br />
== Other conferences and events ==<br />
<br />
{| class="wikitable"<br />
!Title!!Speaker!!Event!!Date!!Location!!Media<br />
|-<br />
|A closer look at the ZFS file system||Paweł Jakub Dawidek||[http://www.bsdcan.org/2008/ BSDCan 2008]||May 16-17, 2008||Ottawa, Canada||[http://www.bsdcan.org/2008/schedule/attachments/58_BSDCan2008-ZFSInternals.pdf slides]|[http://www.youtube.com/watch?v=5-CR3o-Q2CU video]<br />
|-<br />
|The future of ZFS in FreeBSD||Martin Matuška||[http://www.bsdday.eu/2011 BSD Day 2011]||November 5, 2011||Bratislava, Slovakia||[http://people.freebsd.org/~pgj/bsd_day(2011)/materials/02_mm_zfs.pdf slides]|[http://www.youtube.com/watch?v=QSeEtU0-aMQ video]<br />
|-<br />
|Tuning ZFS on FreeBSD||Martin Matuška||[http://2012.eurobsdcon.org EuroBSDCon 2012]||October 20-21, 2012||Warsaw, Poland||[http://blog.vx.sk/uploads/conferences/EuroBSDcon2012/zfs-tuning-handout.pdf slides]|[http://www.youtube.com/watch?v=PIpI7Ub6yjo video]<br />
|-<br />
|bsdtalk227 - ZFS with Matt Ahrens||Matt Ahrens||[http://bsdtalk.blogspot.com/2013/05/bsdtalk227-zfs-with-matt-ahrens.html BSDTalk]||May 17–18, 2013||Ottawa, Canada|||[http://cis01.uma.edu/~wbackman/bsdtalk/bsdtalk227.mp3 audio]<br />
|-<br />
|FreeBSD, Capsicum, GELI and ZFS as key components of a security appliance||Paweł Jakub Dawidek||[http://www.bsdcan.org/2013 BSDCan 2013]||May 17–18, 2013||Ottawa, Canada|||[https://www.youtube.com/watch?v=ErEdIq_nodA video]<br />
|-<br />
|OpenZFS @ BSDCan||Matthew Ahrens||[http://www.bsdcan.org/2013 BSDCan 2013]||May 17–18, 2013||Ottawa, Canada||[http://www.bsdcan.org/2013/schedule/attachments/241_BSDCan2013-ZFS-BOF.pdf slides]|<br />
|-<br />
|[http://linuxconcloudopenna2013.sched.org/event/b50b23f3ed3bd728fa0052b54021a2cc#.UgkeQ2SG2hU OpenZFS on Linux: How the Linux, FreeBSD, and Illumos Communities are Joining Forces to Continue Improving Open-Source ZFS]||Matt Ahrens and Brian Behlendorf||[http://events.linuxfoundation.org/events/linuxcon-north-america LinuxCon North America]||September 17, 2013 ||New Orleans, USA||[http://www.slideshare.net/MatthewAhrens/open-zfs-linuxcon slides]|<br />
|-<br />
|[http://2013.eurobsdcon.org/eurobsdcon-2013/talks/#AhrensMatuska OpenZFS: Upcoming Features and Performance Enhancements with illumos and FreeBSD joining Forces]<br />
| Matt Ahrens,<br>Martin Matuška<br />
|[http://2013.eurobsdcon.org/ EuroBSDCon 2013]<br />
|September 28, 2013 <br />
|Malta<br />
|[[File:OpenZFS-EuroBSDcon.pdf | PDF]], [http://www.slideshare.net/MatthewAhrens/open-zfs-eurobsdcon SlideShare]<br />
|-<br />
|[http://www.nosig.org/ARCHIVE/1oct2013/agenda-1oct2013.html The OpenZFS project]<br />
|Matt Ahrens<br />
|[https://blogs.oracle.com/bartm/entry/the_birth_of_nosig_the NOSIG]<br />
|October 1, 2013<br />
|Amsterdam<br />
|[http://www.youtube.com/watch?v=QMVnPKhvUlE video]<br />
|-<br />
|Everything OpenZFS<br />
|Matt Ahrens<br />
|[[OpenZFS Office Hours]]<br />
|October 11, 2013<br />
|YouTube + IRC<br />
|[http://youtu.be/G2vIdPmsnTI video]<br />
|-<br />
|[http://www.openserversummit.com/English/Conference/Seminar_Session_Descriptions.html#SD104 OpenZFS: the future of open-source ZFS development]<br />
|[[User:Mahrens | Matt Ahrens]], [[User:Gwilson | George Wilson]]<br />
|[http://www.openserversummit.com/ OpenStorage Summit]<br />
|October 23, 2013<br />
|Santa Clara, CA<br />
|<br />
|-<br />
|[https://www.usenix.org/conference/lisa13/systems-performance Systems Performance]<br />
|Brendan Gregg<br />
|[https://www.usenix.org/conference/lisa13 LISA '13]<br />
|November 2013<br />
|Washington, D.C.<br />
|[https://www.usenix.org/conference/lisa13/systems-performance both]<br />
|-<br />
|[https://www.usenix.org/conference/lisa13/zfs-everyone ZFS for Everyone]<br />
|[[User:Gwilson | George Wilson]]<br />
|[https://www.usenix.org/conference/lisa13 LISA '13]<br />
|November 2013<br />
|Washington, D.C.<br />
|[https://www.usenix.org/conference/lisa13/zfs-everyone both]<br />
|-<br />
|[https://www.usenix.org/conference/lisa13/zfs-depth ZFS in Depth]<br />
|[[User:Gwilson | George Wilson]]<br />
|[https://www.usenix.org/conference/lisa13 LISA '13]<br />
|November 2013<br />
|Washington, D.C.<br />
|<br />
|-<br />
|[http://www.tech13.ukoug.org/default.asp?p=10186&dlgact=shwprs&prs_prsid=8896&day_dayid=74 ZFS for Databases]<br />
|[http://dtrace.org/blogs/ahl/ Adam Leventhal]<br />
|[http://www.tech13.ukoug.org/ UKOUG Tech13]<br />
|December 3, 2013<br />
|Manchester, UK<br />
|[http://www.slideshare.net/ahl0003/zfs-for-databases-28844118 Slides]<br />
|-<br />
|[https://zfslondon.eventbrite.com/ ZFS Internals London 2013]<br />
|Max Bruning<br />
|<br />
|December 9-11, 2013<br />
|London<br />
|<br />
|-<br />
|OpenZFS Office Hours with George Wilson<br />
|[[User:gwilson | George Wilson]]<br />
|[[OpenZFS Office Hours]]<br />
|December 12, 2013<br />
|YouTube, g+ hangout, and IRC<br />
|[http://www.youtube.com/watch?v=wWmVW2R_uz8 video]<br />
|-<br />
|The OpenZFS Project<br />
|Andrew Gabriel<br />
|[http://www.ukoug.org/events/ukoug-solaris-sig-meeting-dec-2013/ UKOUG Solaris SIG Meeting]<br />
|December 18, 2013<br />
|London<br />
|visible to UKOUG members<br />
|-<br />
| OpenZFS: The Future of Open Source ZFS Development<br />
| [[User:mahrens | Matt Ahrens]]<br />
| [http://sites.ieee.org/scv-cs/archives/openzfs-future-open-source-zfs-development IEEE Computer Society of Silicon Valley]<br />
| 11 February<br />
| San Jose, CA<br />
|<br />
|-<br />
| [http://2014.asiabsdcon.org/timetable.html.en#P4A ZFS for the Masses: ... PC-BSD and FreeNAS]<br />
| Dru Lavigne<br />
| [http://2014.asiabsdcon.org/ AsiaBSDcon]<br />
| March 15, 2014<br />
| Tokyo, Japan<br />
|<br />
|-<br />
| [http://2014.asiabsdcon.org/timetable.html.en#P3A Snapshots, Replication and Boot-Environments] with ZFS on FreeBSD<br />
| Kris Moore<br />
| [http://2014.asiabsdcon.org/ AsiaBSDcon]<br />
| March 15, 2014<br />
| Tokyo, Japan<br />
|<br />
|-<br />
| [http://2014.asiabsdcon.org/timetable.html.en#P1B Visualizing Unix: Graphing bhyve, ZFS and PF with Graphite]<br />
| Michael Dexter<br />
| [http://2014.asiabsdcon.org/ AsiaBSDcon]<br />
| March 15, 2014<br />
| Tokyo, Japan<br />
|<br />
|-<br />
| [http://2014.asiabsdcon.org/timetable.html.en#K1 OpenZFS keynote]<br />
| [[User:mahrens | Matt Ahrens]]<br />
| [http://2014.asiabsdcon.org/ AsiaBSDcon]<br />
| March 15, 2014<br />
| Tokyo, Japan<br />
|[http://www.slideshare.net/MatthewAhrens/openzfs-asiabsdcon slides]<br />
|-<br />
| [http://www.bsdcan.org/2014/schedule/events/464.en.html Forensic Timestamp Analysis of ZFS]<br />
| Dylan Leigh<br />
| [http://www.bsdcan.org/2014/ BSDcan]<br />
| May 16, 2014<br />
| Ottawa, Canada<br />
|<br />
|-<br />
| [http://www.bsdcan.org/2014/schedule/events/466.en.html OpenZFS: upcoming features and performance enhancements]<br />
| [[User:mahrens | Matt Ahrens]]<br />
| [http://www.bsdcan.org/2014/ BSDcan]<br />
| May 17, 2014<br />
| Ottawa, Canada<br />
| [http://www.bsdcan.org/2014/schedule/attachments/280_OpenZFS%20-%20BSDcan%202014.pdf slides], [https://www.youtube.com/watch?v=EjGqVdCOIhM&list=PL2BmtSoZtRyBzTDkJRt3nXZOnj12vXQ3c&index=10 video]<br />
|-<br />
| OpenZFS<br />
| [[User:mahrens | Matt Ahrens]]<br />
| [http://www.dotscale.eu/ dotScale]<br />
| May 19, 2014<br />
| Paris, France<br />
| <br />
|}</div>Grahamperrinhttps://openzfs.org/w/index.php?title=Publications&diff=1467Publications2014-06-08T19:41:19Z<p>Grahamperrin: Moving past events</p>
<hr />
<div>References to OpenZFS related publications and conference talk recordings.<br />
<br />
== Publications ==<br />
=== BSD ===<br />
{| class="wikitable"<br />
!Title!!Author!!Publication!!Issue!!Page!!Link<br />
|-<br />
|Tuning ZFS on FreeBSD||Martin Matuška||BSD Magazine||issue 08/2012(37)||p. 10-15||[http://bsdmag.org/magazine/1809-tuning-zfs-on-freebsd download]<br />
|-<br />
|ZFS and FreeBSD||Martin Matuška||BSD Magazine||issue 02/2011(19)||p. 10-13||[http://bsdmag.org/magazine/1638-zfs-and-freebsd download]<br />
|-<br />
|OpenZFS||Matt Ahrens||AsiaBSDcon proceedings||2014||||[http://www.open-zfs.org/w/images/0/0f/AsiaBSDcon_paper.pdf download]<br />
|}<br />
<br />
== Conference talks ==<br />
Most recent talks are at the bottom.<br />
<br />
=== ZFS Day 2012 ===<br />
[http://zfsday.com/zfsday/ ZFS Day], October 2, 2012, San Francisco, CA<br />
{| class="wikitable"<br />
!Title!!Speaker!!Slides!!Video<br />
|-<br />
|ZFS State of the Union||Matt Ahrens||[http://zfsday.com/wp-content/uploads/2012/08/ZFS-Day-Matt-Ahrens.pdf slides]||[http://zfsday.com/zfsday/zfs-state-of-the-union-matt-ahrens/ video]<br />
|-<br />
|Making the Impossible Possible: Disposable Staging Environments At Scale||Eric Sproul||[http://zfsday.com/wp-content/uploads/2012/08/Disposable_Envs_at_Scale-1.pdf slides]||[http://zfsday.com/zfsday/making-the-impossible-possible-disposable-staging-environments-at-scale/ video]<br />
|-<br />
|Running Without a ZFS Root Pool||Bill Pijewski||[http://zfsday.com/wp-content/uploads/2012/08/zfsday_100212.pdf slides]||[http://zfsday.com/zfsday/running-without-a-zfs-root-pool/ video]<br />
|-<br />
|Productizing ZFS||Justin Gibbs, Will Andrews||||[http://zfsday.com/zfsday/productizing-zfs/ video]<br />
|-<br />
|ZFS for Linux Implementation||Brian Behlendorf||||[http://zfsday.com/zfsday/zfs-for-linux-implementation/ video]<br />
|-<br />
|Panel: The State of ZFS on...||||||[http://zfsday.com/zfsday/panel-the-state-of-zfs-on/ video]<br />
|-<br />
|ZFS Performance Analysis and Tools||Brendan Gregg||[http://www.slideshare.net/brendangregg/zfsperftools2012 slides]||[http://zfsday.com/zfsday/zfs-performance-analysis-and-tools/ video]<br />
|-<br />
|Architecting ZFS Solutions||Richard Elling||||[http://zfsday.com/zfsday/architecting-zfs-solutions/ video]<br />
|-<br />
|Hybrid Storage Pools: Using Disk and Flash with ZFS||Adam Leventhal||||[http://zfsday.com/zfsday/hybrid-storage-pools-using-disk-and-flash-with-zfs/ video]<br />
|-<br />
|ZFS: Darwin's Storage||Jonathan Halstuch||[http://www.racktopsystems.com/wp-content/uploads/2012/10/Darwins-storage-ZFS.pdf slides]||[http://zfsday.com/zfsday/zfs-darwins-storage/ video]<br />
|-<br />
|Y4K?||George Wilson||[http://zfsday.com/wp-content/uploads/2012/08/Why-4k_.pdf slides]||[http://zfsday.com/zfsday/y4k/ video]<br />
|}<br />
<br />
=== 2013 [[OpenZFS Developer Summit]] ===<br />
<br />
November 18th 2013, San Francisco<br />
<br />
{| class="wikitable"<br />
!Title!!Speaker!!Slides!!Video<br />
|-<br />
|Introduction||Matt Ahrens||[http://www.slideshare.net/MatthewAhrens/open-zfs-devsummit slides]||[https://www.youtube.com/watch?v=U3dMhpmQTrU&list=PLaUVvul17xSdWMBt5tAC8Hu7bbeWskD_q video]<br />
|-<br />
|Platform Panel||Brian Behlendorf, Jorgen Lundman, Chris Siden, Xin Li||-||[https://www.youtube.com/watch?v=U3dMhpmQTrU&list=PLaUVvul17xSdWMBt5tAC8Hu7bbeWskD_q video]<br />
|-<br />
|Platform-independent code repository||Matt Ahrens||[http://www.slideshare.net/MatthewAhrens/openzfs-code-repository slides]||[https://www.youtube.com/watch?v=U3dMhpmQTrU&list=PLaUVvul17xSdWMBt5tAC8Hu7bbeWskD_q video]<br />
|-<br />
|Storage Tiering||Boris Protopopov||[http://www.open-zfs.org/w/images/7/71/ZFS_tiering.pdf slides]||[https://www.youtube.com/watch?v=tm0NYEVS6qM&list=PLaUVvul17xSdWMBt5tAC8Hu7bbeWskD_q video]<br />
|-<br />
|Vendor Lightning Talks||Many||-||[https://www.youtube.com/watch?v=EGKek5sZ2Xw&list=PLaUVvul17xSdWMBt5tAC8Hu7bbeWskD_q video]<br />
|-<br />
|Community Planning||Karyn Ritter||[https://docs.google.com/presentation/d/1LCvQxcNSxUi-5-NUgVRKp68iMLOrepp1VRJxPrklBPY/pub?start=false&loop=false&delayms=3000 slides]||[https://www.youtube.com/watch?v=EGKek5sZ2Xw&list=PLaUVvul17xSdWMBt5tAC8Hu7bbeWskD_q video]<br />
|-<br />
|Channel Programs||Chris Siden, Max Grossman||[http://www.slideshare.net/MatthewAhrens/openzfs-channel-programs slides]||[https://www.youtube.com/watch?v=EGKek5sZ2Xw&list=PLaUVvul17xSdWMBt5tAC8Hu7bbeWskD_q video]<br />
|-<br />
|Test Coverage||John Kennedy||[http://www.slideshare.net/jwk404/open-zfs-111813-28528303 slides]||[https://www.youtube.com/watch?v=M5RnPZW0_Xk&list=PLaUVvul17xSdWMBt5tAC8Hu7bbeWskD_q video]<br />
|-<br />
|Performance Investigation||Adam Leventhal||[http://www.slideshare.net/ahl0003/openzfs-datadriven-performance slides]||[https://www.youtube.com/watch?v=w3-eppY7ICc&list=PLaUVvul17xSdWMBt5tAC8Hu7bbeWskD_q video]<br />
|-<br />
|Performance on full & fragmented pools||George Wilson||[http://www.slideshare.net/gw25295/pool-performance-28609362 slides]||[https://www.youtube.com/watch?v=UuscV_fSncY&list=PLaUVvul17xSdWMBt5tAC8Hu7bbeWskD_q video]<br />
|-<br />
|Scalability|| Kirill Davydychev ||-||[https://www.youtube.com/watch?v=hvoL6z8YKgM&list=PLaUVvul17xSdWMBt5tAC8Hu7bbeWskD_q video]<br />
|-<br />
|Virtual Memory Interactions|| Brian Behlendorf ||-||[https://www.youtube.com/watch?v=hvoL6z8YKgM&list=PLaUVvul17xSdWMBt5tAC8Hu7bbeWskD_q video]<br />
|-<br />
|Multi Tenancy|| Rob Mustacchi ||-||[https://www.youtube.com/watch?v=MLTX1i7UEL4&list=PLaUVvul17xSdWMBt5tAC8Hu7bbeWskD_q video]<br />
|-<br />
|Examining On-disk Format|| Max Bruning ||-||[https://www.youtube.com/watch?v=MLTX1i7UEL4&list=PLaUVvul17xSdWMBt5tAC8Hu7bbeWskD_q video]<br />
|}<br />
<br />
=== 2014 [http://www.meetup.com/OpenZFS-Europe OpenZFS European Conference] ===<br />
<br />
May 20th, 2014, Paris<br />
<br />
{| class="wikitable"<br />
!Title!!Speaker!!Slides!![http://www.youtube.com/playlist?list=PLaUVvul17xScyhIYmGjaNaGSWI49qyf6K Video]<br />
|-<br />
|Introduction||Matt Ahrens||[http://www.open-zfs.org/w/images/c/ca/Matt_Ahrens_-_OpenZFS_-_Europe.pdf slides]||[http://www.youtube.com/watch?v=Mk1czZs6vkQ&index=5&list=PLaUVvul17xScyhIYmGjaNaGSWI49qyf6K video]<br />
|-<br />
|FhGFS performance on ZFS||Michael Alexander||[http://www.open-zfs.org/w/images/6/62/TU_Wien_Vienna_-_FhGFS_over_ZFS_Performance.pdf slides]||[http://www.youtube.com/watch?v=Ak1HB507-xY&index=10&list=PLaUVvul17xScyhIYmGjaNaGSWI49qyf6K video]<br />
|-<br />
|Testing ZFS on FreeBSD||Andriy Gapon||[http://www.open-zfs.org/w/images/9/98/Andriy_-_FreeBSD_Dev_Talk.pdf slides]||[http://www.youtube.com/watch?v=oB-QDwVuBH4&index=8&list=PLaUVvul17xScyhIYmGjaNaGSWI49qyf6K video]<br />
|-<br />
|HybridCluster: ZFS in the cloud||Luke Marsden||[http://www.open-zfs.org/w/images/3/3b/HybridCluster_Dev_Talk.pdf slides]||[http://www.youtube.com/watch?v=ISI9Ppj3kTo&index=7&list=PLaUVvul17xScyhIYmGjaNaGSWI49qyf6K video]<br />
|-<br />
|Syneto: continuously delivering a ZFS-based OS||Vadim Comănescu||[http://www.open-zfs.org/w/images/f/f5/Syneto_-_Continuously_Deploying_a_ZFS_based_OS.pdf slides]||[http://www.youtube.com/watch?v=1xK94v0BedE&list=PLaUVvul17xScyhIYmGjaNaGSWI49qyf6K&index=12 video]<br />
|-<br />
|DDRdrive ZIL accelerator: random write revelation||Chris George||[http://www.open-zfs.org/w/images/9/98/DDRdrive_zil_rw_revelation.pdf slides]||[http://www.youtube.com/watch?v=ScNHjWBQYQ8&index=6&list=PLaUVvul17xScyhIYmGjaNaGSWI49qyf6K video]<br />
|-<br />
|High-Availability||Grenville Whelan||[http://www.open-zfs.org/w/images/a/a7/High_Availability_-_Introduction.pdf slides]||[http://www.youtube.com/watch?v=tiTYZykCeDo&index=14&list=PLaUVvul17xScyhIYmGjaNaGSWI49qyf6K video]<br />
|-<br />
|Harman Holistic||Phil Harman||||[https://www.youtube.com/watch?v=ApjkrBVlPXk&index=15&list=PLaUVvul17xScyhIYmGjaNaGSWI49qyf6K video]<br />
|-<br />
|Storiant and OpenZFS||Mark Rees||||[http://www.youtube.com/watch?v=41yl23EACns&index=13&list=PLaUVvul17xScyhIYmGjaNaGSWI49qyf6K video]<br />
|-<br />
|EraStor ZFS appliances||Andrew Holway||[http://www.open-zfs.org/w/images/7/73/EraStor_-_Introduction_to_EraStor_Appliances.pdf slides]||[http://www.youtube.com/watch?v=b4L0DRvKJxo&index=9&list=PLaUVvul17xScyhIYmGjaNaGSWI49qyf6K video]<br />
|-<br />
|Syneto and OpenZFS||Dan Vâtca||[http://www.open-zfs.org/w/images/6/6b/Syneto_-_Introducing_StorageOS_and_ZFS.pdf slides]||[http://www.youtube.com/watch?v=pPOW8bwUXxo&index=5&list=PLaUVvul17xScyhIYmGjaNaGSWI49qyf6K video]<br />
|-<br />
|HybridCluster and OpenZFS||Luke Marsden||[http://www.open-zfs.org/w/images/3/33/HybridCluster_-_lightning_talk.pdf slides]||[http://www.youtube.com/watch?v=uSM1s1aWlZE&index=2&list=PLaUVvul17xScyhIYmGjaNaGSWI49qyf6K video]<br />
|-<br />
|Delphix and OpenZFS||Matt Ahrens||[http://www.open-zfs.org/w/images/4/46/Delphix_-_Introduction.pdf slides]||[http://www.youtube.com/watch?v=UaRdzUOsieA&index=3&list=PLaUVvul17xScyhIYmGjaNaGSWI49qyf6K video]<br />
|}<br />
<br />
== Other conferences and events ==<br />
<br />
{| class="wikitable"<br />
!Title!!Speaker!!Event!!Date!!Location!!Media<br />
|-<br />
|A closer look at the ZFS file system||Paweł Jakub Dawidek||[http://www.bsdcan.org/2008/ BSDCan 2008]||May 16-17, 2008||Ottawa, Canada||[http://www.bsdcan.org/2008/schedule/attachments/58_BSDCan2008-ZFSInternals.pdf slides]|[http://www.youtube.com/watch?v=5-CR3o-Q2CU video]<br />
|-<br />
|The future of ZFS in FreeBSD||Martin Matuška||[http://www.bsdday.eu/2011 BSD Day 2011]||November 5, 2011||Bratislava, Slovakia||[http://people.freebsd.org/~pgj/bsd_day(2011)/materials/02_mm_zfs.pdf slides]|[http://www.youtube.com/watch?v=QSeEtU0-aMQ video]<br />
|-<br />
|Tuning ZFS on FreeBSD||Martin Matuška||[http://2012.eurobsdcon.org EuroBSDCon 2012]||October 20-21, 2012||Warsaw, Poland||[http://blog.vx.sk/uploads/conferences/EuroBSDcon2012/zfs-tuning-handout.pdf slides]|[http://www.youtube.com/watch?v=PIpI7Ub6yjo video]<br />
|-<br />
|bsdtalk227 - ZFS with Matt Ahrens||Matt Ahrens||[http://bsdtalk.blogspot.com/2013/05/bsdtalk227-zfs-with-matt-ahrens.html BSDTalk]||May 17–18, 2013||Ottawa, Canada|||[http://cis01.uma.edu/~wbackman/bsdtalk/bsdtalk227.mp3 audio]<br />
|-<br />
|FreeBSD, Capsicum, GELI and ZFS as key components of a security appliance||Paweł Jakub Dawidek||[http://www.bsdcan.org/2013 BSDCan 2013]||May 17–18, 2013||Ottawa, Canada|||[https://www.youtube.com/watch?v=ErEdIq_nodA video]<br />
|-<br />
|OpenZFS @ BSDCan||Matthew Ahrens||[http://www.bsdcan.org/2013 BSDCan 2013]||May 17–18, 2013||Ottawa, Canada||[http://www.bsdcan.org/2013/schedule/attachments/241_BSDCan2013-ZFS-BOF.pdf slides]|<br />
|-<br />
|[http://linuxconcloudopenna2013.sched.org/event/b50b23f3ed3bd728fa0052b54021a2cc#.UgkeQ2SG2hU OpenZFS on Linux: How the Linux, FreeBSD, and Illumos Communities are Joining Forces to Continue Improving Open-Source ZFS]||Matt Ahrens and Brian Behlendorf||[http://events.linuxfoundation.org/events/linuxcon-north-america LinuxCon North America]||September 17, 2013 ||New Orleans, USA||[http://www.slideshare.net/MatthewAhrens/open-zfs-linuxcon slides]|<br />
|-<br />
|[http://2013.eurobsdcon.org/eurobsdcon-2013/talks/#AhrensMatuska OpenZFS: Upcoming Features and Performance Enhancements with illumos and FreeBSD joining Forces]<br />
| Matt Ahrens,<br>Martin Matuška<br />
|[http://2013.eurobsdcon.org/ EuroBSDCon 2013]<br />
|September 28, 2013 <br />
|Malta<br />
|[[File:OpenZFS-EuroBSDcon.pdf | PDF]], [http://www.slideshare.net/MatthewAhrens/open-zfs-eurobsdcon SlideShare]<br />
|-<br />
|[http://www.nosig.org/ARCHIVE/1oct2013/agenda-1oct2013.html The OpenZFS project]<br />
|Matt Ahrens<br />
|[https://blogs.oracle.com/bartm/entry/the_birth_of_nosig_the NOSIG]<br />
|October 1, 2013<br />
|Amsterdam<br />
|[http://www.youtube.com/watch?v=QMVnPKhvUlE video]<br />
|-<br />
|Everything OpenZFS<br />
|Matt Ahrens<br />
|[[OpenZFS Office Hours]]<br />
|October 11, 2013<br />
|YouTube + IRC<br />
|[http://youtu.be/G2vIdPmsnTI video]<br />
|-<br />
|[http://www.openserversummit.com/English/Conference/Seminar_Session_Descriptions.html#SD104 OpenZFS: the future of open-source ZFS development]<br />
|[[User:Mahrens | Matt Ahrens]], [[User:Gwilson | George Wilson]]<br />
|[http://www.openserversummit.com/ OpenStorage Summit]<br />
|October 23, 2013<br />
|Santa Clara, CA<br />
|<br />
|-<br />
|[https://www.usenix.org/conference/lisa13/systems-performance Systems Performance]<br />
|Brendan Gregg<br />
|[https://www.usenix.org/conference/lisa13 LISA '13]<br />
|November 2013<br />
|Washington, D.C.<br />
|[https://www.usenix.org/conference/lisa13/systems-performance both]<br />
|-<br />
|[https://www.usenix.org/conference/lisa13/zfs-everyone ZFS for Everyone]<br />
|[[User:Gwilson | George Wilson]]<br />
|[https://www.usenix.org/conference/lisa13 LISA '13]<br />
|November 2013<br />
|Washington, D.C.<br />
|[https://www.usenix.org/conference/lisa13/zfs-everyone both]<br />
|-<br />
|[https://www.usenix.org/conference/lisa13/zfs-depth ZFS in Depth]<br />
|[[User:Gwilson | George Wilson]]<br />
|[https://www.usenix.org/conference/lisa13 LISA '13]<br />
|November 2013<br />
|Washington, D.C.<br />
|<br />
|-<br />
|[http://www.tech13.ukoug.org/default.asp?p=10186&dlgact=shwprs&prs_prsid=8896&day_dayid=74 ZFS for Databases]<br />
|[http://dtrace.org/blogs/ahl/ Adam Leventhal]<br />
|[http://www.tech13.ukoug.org/ UKOUG Tech13]<br />
|December 3, 2013<br />
|Manchester, UK<br />
|[http://www.slideshare.net/ahl0003/zfs-for-databases-28844118 Slides]<br />
|-<br />
|[https://zfslondon.eventbrite.com/ ZFS Internals London 2013]<br />
|Max Bruning<br />
|<br />
|December 9-11, 2013<br />
|London<br />
|<br />
|-<br />
|OpenZFS Office Hours with George Wilson<br />
|[[User:gwilson | George Wilson]]<br />
|[[OpenZFS Office Hours]]<br />
|December 12, 2013<br />
|YouTube, g+ hangout, and IRC<br />
|[http://www.youtube.com/watch?v=wWmVW2R_uz8 video]<br />
|-<br />
|The OpenZFS Project<br />
|Andrew Gabriel<br />
|[http://www.ukoug.org/events/ukoug-solaris-sig-meeting-dec-2013/ UKOUG Solaris SIG Meeting]<br />
|December 18, 2013<br />
|London<br />
|visible to UKOUG members<br />
|-<br />
| OpenZFS: The Future of Open Source ZFS Development<br />
| [[User:mahrens | Matt Ahrens]]<br />
| [http://sites.ieee.org/scv-cs/archives/openzfs-future-open-source-zfs-development IEEE Computer Society of Silicon Valley]<br />
| 11 February<br />
| San Jose, CA<br />
|<br />
|-<br />
| [http://2014.asiabsdcon.org/timetable.html.en#P4A ZFS for the Masses: ... PC-BSD and FreeNAS]<br />
| Dru Lavigne<br />
| [http://2014.asiabsdcon.org/ AsiaBSDcon]<br />
| March 15, 2014<br />
| Tokyo, Japan<br />
|<br />
|-<br />
| [http://2014.asiabsdcon.org/timetable.html.en#P3A Snapshots, Replication and Boot-Environments] with ZFS on FreeBSD<br />
| Kris Moore<br />
| [http://2014.asiabsdcon.org/ AsiaBSDcon]<br />
| March 15, 2014<br />
| Tokyo, Japan<br />
|<br />
|-<br />
| [http://2014.asiabsdcon.org/timetable.html.en#P1B Visualizing Unix: Graphing bhyve, ZFS and PF with Graphite]<br />
| Michael Dexter<br />
| [http://2014.asiabsdcon.org/ AsiaBSDcon]<br />
| March 15, 2014<br />
| Tokyo, Japan<br />
|<br />
|-<br />
| [http://2014.asiabsdcon.org/timetable.html.en#K1 OpenZFS keynote]<br />
| [[User:mahrens | Matt Ahrens]]<br />
| [http://2014.asiabsdcon.org/ AsiaBSDcon]<br />
| March 15, 2014<br />
| Tokyo, Japan<br />
|[http://www.slideshare.net/MatthewAhrens/openzfs-asiabsdcon slides]<br />
|-<br />
| [http://www.bsdcan.org/2014/schedule/events/464.en.html Forensic Timestamp Analysis of ZFS]<br />
| Dylan Leigh<br />
| [http://www.bsdcan.org/2014/ BSDcan]<br />
| May 16, 2014<br />
| Ottawa, Canada<br />
|<br />
|-<br />
| Snapshots, Replication and Boot-Environments with ZFS on FreeBSD<br />
| Kris Moore<br />
| [http://www.bsdcan.org/2014/ BSDcan]<br />
| May 17, 2014<br />
| Ottawa, Canada<br />
|<br />
|-<br />
| [http://www.bsdcan.org/2014/schedule/events/466.en.html OpenZFS: upcoming features and performance enhancements]<br />
| [[User:mahrens | Matt Ahrens]]<br />
| [http://www.bsdcan.org/2014/ BSDcan]<br />
| May 17, 2014<br />
| Ottawa, Canada<br />
| [http://www.bsdcan.org/2014/schedule/attachments/280_OpenZFS%20-%20BSDcan%202014.pdf slides], [https://www.youtube.com/watch?v=EjGqVdCOIhM&list=PL2BmtSoZtRyBzTDkJRt3nXZOnj12vXQ3c&index=10 video]<br />
|-<br />
| OpenZFS<br />
| [[User:mahrens | Matt Ahrens]]<br />
| [http://www.dotscale.eu/ dotScale]<br />
| May 19, 2014<br />
| Paris, France<br />
| <br />
|}</div>Grahamperrinhttps://openzfs.org/w/index.php?title=OpenZFSOnOSX&diff=1376OpenZFSOnOSX2014-03-14T18:17:18Z<p>Grahamperrin: typo in link</p>
<hr />
<div>== MacZFS ==<br />
<br />
{|cellpadding="20" <br />
| [[file:MacZFS-logo.png | link=http://maczfs.org]]<br />
| http://maczfs.org<br />
The April 2013 release of MacZFS is stable, but lacks the feature set that's associated with OpenZFS …<br />
|}<br />
<br />
== OpenZFS for OS X (ZFS-OSX) ==<br />
<br />
'''ZFS-OSX brings OpenZFS features to MacZFS'''. <br />
<br />
[http://openzfsonosx.org OpenZFS for OS X] is a well-developed alpha that is ready for testing by people who are happy to use Terminal. It's designed for use with Mac OS X 10.6 – OS X 10.9 (Snow Leopard, Lion, Mountain Lion and Mavericks).<br />
<br />
=== To begin testing the most recent build ===<br />
<br />
[http://zerobsd.tumblr.com/post/62586498252/os-x-with-zfs ZeroBSD | OS X with ZFS] offers an approach to obtaining the most recent code, building from that code and installing the built software. <br />
<br />
=== To test without building ===<br />
<br />
Disk images are ocasionally added to http://lundman.net/ftp/osx.zfs/ – aim for the most recent .dmg file. The image will contain built software – binaries, kernel extensions (KEXTs) and so on – that may be used with or without installation. <br />
<br />
These images are not designed to include the most recent fixes or enhancements. If in doubt, please ask in IRC: <br />
<br />
* irc://chat.freenode.net/#mac-zfs<br />
<br />
=== Suggested focus areas for testers ===<br />
<br />
A ZFS file system for your home directory<br />
* where ~ is the root of that file system. <br />
<br />
A ZFS file system containing multiple home directories. <br />
<br />
=== Notes ===<br />
<br />
ZFS-OSX is [https://github.com/zfs-osx/zfs/issues?direction=asc&sort=created&state=open not yet feature-complete]. <br />
<br />
Alpha software should not be used with data that is of significant value. Be thorough with your backups and please remember that ZFS alone is not a substitute for a good backup strategy.<br />
<br />
If you're limited to Leopard, or if you require the most stable MacZFS at this time, then instead of ZFS-OSX: consider relatively old version 74.3 of MacZFS.<br />
<br />
If you normally use MacZFS 74.3 or ZEVO: <br />
<br />
* you must uninstall that software before testing ZFS-OSX<br />
* you must uninstall ZFS-OSX before reverting to ZEVO or MacZFS 74.3<br />
<br />
– and [http://zevo.getgreenbytes.com/forum/viewtopic.php?p=5441#p5441 a restart of the Mac may be recommended].</div>Grahamperrinhttps://openzfs.org/w/index.php?title=OpenZFSOnOSX&diff=1375OpenZFSOnOSX2014-03-14T18:16:03Z<p>Grahamperrin: OpenZFS for OS X a.k.a. ZFS-OSX</p>
<hr />
<div>== MacZFS ==<br />
<br />
{|cellpadding="20" <br />
| [[file:MacZFS-logo.png | link=http://maczfs.org]]<br />
| http://maczfs.org<br />
The April 2013 release of MacZFS is stable, but lacks the feature set that's associated with OpenZFS …<br />
|}<br />
<br />
== OpenZFS for OS X (ZFS-OSX) ==<br />
<br />
'''ZFS-OSX brings OpenZFS features to MacZFS'''. <br />
<br />
[http://openzfsonosx.org | OpenZFS for OS X] is a well-developed alpha that is ready for testing by people who are happy to use Terminal. It's designed for use with Mac OS X 10.6 – OS X 10.9 (Snow Leopard, Lion, Mountain Lion and Mavericks).<br />
<br />
=== To begin testing the most recent build ===<br />
<br />
[http://zerobsd.tumblr.com/post/62586498252/os-x-with-zfs ZeroBSD | OS X with ZFS] offers an approach to obtaining the most recent code, building from that code and installing the built software. <br />
<br />
=== To test without building ===<br />
<br />
Disk images are ocasionally added to http://lundman.net/ftp/osx.zfs/ – aim for the most recent .dmg file. The image will contain built software – binaries, kernel extensions (KEXTs) and so on – that may be used with or without installation. <br />
<br />
These images are not designed to include the most recent fixes or enhancements. If in doubt, please ask in IRC: <br />
<br />
* irc://chat.freenode.net/#mac-zfs<br />
<br />
=== Suggested focus areas for testers ===<br />
<br />
A ZFS file system for your home directory<br />
* where ~ is the root of that file system. <br />
<br />
A ZFS file system containing multiple home directories. <br />
<br />
=== Notes ===<br />
<br />
ZFS-OSX is [https://github.com/zfs-osx/zfs/issues?direction=asc&sort=created&state=open not yet feature-complete]. <br />
<br />
Alpha software should not be used with data that is of significant value. Be thorough with your backups and please remember that ZFS alone is not a substitute for a good backup strategy.<br />
<br />
If you're limited to Leopard, or if you require the most stable MacZFS at this time, then instead of ZFS-OSX: consider relatively old version 74.3 of MacZFS.<br />
<br />
If you normally use MacZFS 74.3 or ZEVO: <br />
<br />
* you must uninstall that software before testing ZFS-OSX<br />
* you must uninstall ZFS-OSX before reverting to ZEVO or MacZFS 74.3<br />
<br />
– and [http://zevo.getgreenbytes.com/forum/viewtopic.php?p=5441#p5441 a restart of the Mac may be recommended].</div>Grahamperrinhttps://openzfs.org/w/index.php?title=OpenZFSOnOSX&diff=1374OpenZFSOnOSX2014-03-14T18:12:47Z<p>Grahamperrin: link to openzfsonosx.org etc</p>
<hr />
<div>== MacZFS ==<br />
<br />
{|cellpadding="20" <br />
| [[file:MacZFS-logo.png | link=http://maczfs.org]]<br />
| http://maczfs.org<br />
The April 2013 release of MacZFS is stable, but lacks the feature set that's associated with OpenZFS …<br />
|}<br />
<br />
== ZFS-OSX ==<br />
<br />
'''ZFS-OSX brings OpenZFS features to MacZFS'''. <br />
<br />
[http://openzfsonosx.org] is a well-developed alpha that is ready for testing by people who are happy to use Terminal. It's designed for use with Mac OS X 10.6 – OS X 10.9 (Snow Leopard, Lion, Mountain Lion and Mavericks).<br />
<br />
=== To begin testing the most recent build ===<br />
<br />
[http://zerobsd.tumblr.com/post/62586498252/os-x-with-zfs ZeroBSD | OS X with ZFS] offers an approach to obtaining the most recent code, building from that code and installing the built software. <br />
<br />
=== To test without building ===<br />
<br />
Disk images are ocasionally added to http://lundman.net/ftp/osx.zfs/ – aim for the most recent .dmg file. The image will contain built software – binaries, kernel extensions (KEXTs) and so on – that may be used with or without installation. <br />
<br />
These images are not designed to include the most recent fixes or enhancements. If in doubt, please ask in IRC: <br />
<br />
* irc://chat.freenode.net/#mac-zfs<br />
<br />
=== Suggested focus areas for testers ===<br />
<br />
A ZFS file system for your home directory<br />
* where ~ is the root of that file system. <br />
<br />
A ZFS file system containing multiple home directories. <br />
<br />
=== Notes ===<br />
<br />
ZFS-OSX is [https://github.com/zfs-osx/zfs/issues?direction=asc&sort=created&state=open not yet feature-complete]. <br />
<br />
Alpha software should not be used with data that is of significant value. Be thorough with your backups and please remember that ZFS alone is not a substitute for a good backup strategy.<br />
<br />
If you're limited to Leopard, or if you require the most stable MacZFS at this time, then instead of ZFS-OSX: consider relatively old version 74.3 of MacZFS.<br />
<br />
If you normally use MacZFS 74.3 or ZEVO: <br />
<br />
* you must uninstall that software before testing ZFS-OSX<br />
* you must uninstall ZFS-OSX before reverting to ZEVO or MacZFS 74.3<br />
<br />
– and [http://zevo.getgreenbytes.com/forum/viewtopic.php?p=5441#p5441 a restart of the Mac may be recommended].</div>Grahamperrinhttps://openzfs.org/w/index.php?title=Publications&diff=1325Publications2014-01-29T18:14:47Z<p>Grahamperrin: Moving last month's event …</p>
<hr />
<div>References to OpenZFS related publications and conference talk recordings.<br />
<br />
== Publications ==<br />
=== BSD ===<br />
{| class="wikitable"<br />
!Title!!Author!!Publication!!Issue!!Page!!Link<br />
|-<br />
|Tuning ZFS on FreeBSD||Martin Matuška||BSD Magazine||issue 08/2012(37)||p. 10-15||[http://bsdmag.org/magazine/1809-tuning-zfs-on-freebsd download]<br />
|-<br />
|ZFS and FreeBSD||Martin Matuška||BSD Magazine||issue 02/2011(19)||p. 10-13||[http://bsdmag.org/magazine/1638-zfs-and-freebsd download]<br />
|}<br />
<br />
== Conference talks ==<br />
Most recent talks are at the bottom.<br />
<br />
=== ZFS Day 2012 ===<br />
[http://zfsday.com/zfsday/ ZFS Day], October 2, 2012, San Francisco, CA<br />
{| class="wikitable"<br />
!Title!!Speaker!!Slides!!Video<br />
|-<br />
|ZFS State of the Union||Matt Ahrens||[http://zfsday.com/wp-content/uploads/2012/08/ZFS-Day-Matt-Ahrens.pdf slides]||[http://zfsday.com/zfsday/zfs-state-of-the-union-matt-ahrens/ video]<br />
|-<br />
|Making the Impossible Possible: Disposable Staging Environments At Scale||Eric Sproul||[http://zfsday.com/wp-content/uploads/2012/08/Disposable_Envs_at_Scale-1.pdf slides]||[http://zfsday.com/zfsday/making-the-impossible-possible-disposable-staging-environments-at-scale/ video]<br />
|-<br />
|Running Without a ZFS Root Pool||Bill Pijewski||[http://zfsday.com/wp-content/uploads/2012/08/zfsday_100212.pdf slides]||[http://zfsday.com/zfsday/running-without-a-zfs-root-pool/ video]<br />
|-<br />
|Productizing ZFS||Justin Gibbs, Will Andrews||||[http://zfsday.com/zfsday/productizing-zfs/ video]<br />
|-<br />
|ZFS for Linux Implementation||Brian Behlendorf||||[http://zfsday.com/zfsday/zfs-for-linux-implementation/ video]<br />
|-<br />
|Panel: The State of ZFS on...||||||[http://zfsday.com/zfsday/panel-the-state-of-zfs-on/ video]<br />
|-<br />
|ZFS Performance Analysis and Tools||Brendan Gregg||[http://www.slideshare.net/brendangregg/zfsperftools2012 slides]||[http://zfsday.com/zfsday/zfs-performance-analysis-and-tools/ video]<br />
|-<br />
|Architecting ZFS Solutions||Richard Elling||||[http://zfsday.com/zfsday/architecting-zfs-solutions/ video]<br />
|-<br />
|Hybrid Storage Pools: Using Disk and Flash with ZFS||Adam Leventhal||||[http://zfsday.com/zfsday/hybrid-storage-pools-using-disk-and-flash-with-zfs/ video]<br />
|-<br />
|ZFS: Darwin's Storage||Jonathan Halstuch||[http://www.racktopsystems.com/wp-content/uploads/2012/10/Darwins-storage-ZFS.pdf slides]||[http://zfsday.com/zfsday/zfs-darwins-storage/ video]<br />
|-<br />
|Y4K?||George Wilson||[http://zfsday.com/wp-content/uploads/2012/08/Why-4k_.pdf slides]||[http://zfsday.com/zfsday/y4k/ video]<br />
|}<br />
<br />
=== 2013 [[OpenZFS Developer Summit]] ===<br />
<br />
November 18th 2013, San Francisco<br />
<br />
{| class="wikitable"<br />
!Title!!Speaker!!Slides!!Video<br />
|-<br />
|Introduction||Matt Ahrens||[http://www.slideshare.net/MatthewAhrens/open-zfs-devsummit slides]||[https://www.youtube.com/watch?v=U3dMhpmQTrU&list=PLaUVvul17xSdWMBt5tAC8Hu7bbeWskD_q video]<br />
|-<br />
|Platform Panel||Brian Behlendorf, Jorgen Lundman, Chris Siden, Xin Li||-||[https://www.youtube.com/watch?v=U3dMhpmQTrU&list=PLaUVvul17xSdWMBt5tAC8Hu7bbeWskD_q video]<br />
|-<br />
|Platform-independent code repository||Matt Ahrens||[http://www.slideshare.net/MatthewAhrens/openzfs-code-repository slides]||[https://www.youtube.com/watch?v=U3dMhpmQTrU&list=PLaUVvul17xSdWMBt5tAC8Hu7bbeWskD_q video]<br />
|-<br />
|Storage Tiering||Boris Protopopov||[http://www.open-zfs.org/w/images/7/71/ZFS_tiering.pdf slides]||[https://www.youtube.com/watch?v=tm0NYEVS6qM&list=PLaUVvul17xSdWMBt5tAC8Hu7bbeWskD_q video]<br />
|-<br />
|Vendor Lightning Talks||Many||-||[https://www.youtube.com/watch?v=EGKek5sZ2Xw&list=PLaUVvul17xSdWMBt5tAC8Hu7bbeWskD_q video]<br />
|-<br />
|Community Planning||Karyn Ritter||[https://docs.google.com/presentation/d/1LCvQxcNSxUi-5-NUgVRKp68iMLOrepp1VRJxPrklBPY/pub?start=false&loop=false&delayms=3000 slides]||[https://www.youtube.com/watch?v=EGKek5sZ2Xw&list=PLaUVvul17xSdWMBt5tAC8Hu7bbeWskD_q video]<br />
|-<br />
|Channel Programs||Chris Siden, Max Grossman||[http://www.slideshare.net/MatthewAhrens/openzfs-channel-programs slides]||[https://www.youtube.com/watch?v=EGKek5sZ2Xw&list=PLaUVvul17xSdWMBt5tAC8Hu7bbeWskD_q video]<br />
|-<br />
|Test Coverage||John Kennedy||[http://www.slideshare.net/jwk404/open-zfs-111813-28528303 slides]||[https://www.youtube.com/watch?v=M5RnPZW0_Xk&list=PLaUVvul17xSdWMBt5tAC8Hu7bbeWskD_q video]<br />
|-<br />
|Performance Investigation||Adam Leventhal||[http://www.slideshare.net/ahl0003/openzfs-datadriven-performance slides]||[https://www.youtube.com/watch?v=w3-eppY7ICc&list=PLaUVvul17xSdWMBt5tAC8Hu7bbeWskD_q video]<br />
|-<br />
|Performance on full & fragmented pools||George Wilson||[http://www.slideshare.net/gw25295/pool-performance-28609362 slides]||[https://www.youtube.com/watch?v=UuscV_fSncY&list=PLaUVvul17xSdWMBt5tAC8Hu7bbeWskD_q video]<br />
|-<br />
|Scalability|| Kirill Davydychev ||-||[https://www.youtube.com/watch?v=hvoL6z8YKgM&list=PLaUVvul17xSdWMBt5tAC8Hu7bbeWskD_q video]<br />
|-<br />
|Virtual Memory Interactions|| Brian Behlendorf ||-||[https://www.youtube.com/watch?v=hvoL6z8YKgM&list=PLaUVvul17xSdWMBt5tAC8Hu7bbeWskD_q video]<br />
|-<br />
|Multi Tenancy|| Rob Mustacchi ||-||[https://www.youtube.com/watch?v=MLTX1i7UEL4&list=PLaUVvul17xSdWMBt5tAC8Hu7bbeWskD_q video]<br />
|-<br />
|Examining On-disk Format|| Max Bruning ||-||[https://www.youtube.com/watch?v=MLTX1i7UEL4&list=PLaUVvul17xSdWMBt5tAC8Hu7bbeWskD_q video]<br />
|}<br />
<br />
== Other conferences and events ==<br />
<br />
{| class="wikitable"<br />
!Title!!Speaker!!Event!!Date!!Location!!Slides!!Audio<br>/video<br />
|-<br />
|A closer look at the ZFS file system||Paweł Jakub Dawidek||[http://www.bsdcan.org/2008/ BSDCan 2008]||May 16-17, 2008||Ottawa, Canada||[http://www.bsdcan.org/2008/schedule/attachments/58_BSDCan2008-ZFSInternals.pdf slides]||[http://www.youtube.com/watch?v=5-CR3o-Q2CU video]<br />
|-<br />
|The future of ZFS in FreeBSD||Martin Matuška||[http://www.bsdday.eu/2011 BSD Day 2011]||November 5, 2011||Bratislava, Slovakia||[http://people.freebsd.org/~pgj/bsd_day(2011)/materials/02_mm_zfs.pdf slides]||[http://www.youtube.com/watch?v=QSeEtU0-aMQ video]<br />
|-<br />
|Tuning ZFS on FreeBSD||Martin Matuška||[http://2012.eurobsdcon.org EuroBSDCon 2012]||October 20-21, 2012||Warsaw, Poland||[http://blog.vx.sk/uploads/conferences/EuroBSDcon2012/zfs-tuning-handout.pdf slides]||[http://www.youtube.com/watch?v=PIpI7Ub6yjo video]<br />
|-<br />
|bsdtalk227 - ZFS with Matt Ahrens||Matt Ahrens||[http://bsdtalk.blogspot.com/2013/05/bsdtalk227-zfs-with-matt-ahrens.html BSDTalk]||May 17–18, 2013||Ottawa, Canada||||[http://cis01.uma.edu/~wbackman/bsdtalk/bsdtalk227.mp3 audio]<br />
|-<br />
|FreeBSD, Capsicum, GELI and ZFS as key components of a security appliance||Paweł Jakub Dawidek||[http://www.bsdcan.org/2013 BSDCan 2013]||May 17–18, 2013||Ottawa, Canada||||[https://www.youtube.com/watch?v=ErEdIq_nodA video]<br />
|-<br />
|OpenZFS @ BSDCan||Matthew Ahrens||[http://www.bsdcan.org/2013 BSDCan 2013]||May 17–18, 2013||Ottawa, Canada||[http://www.bsdcan.org/2013/schedule/attachments/241_BSDCan2013-ZFS-BOF.pdf slides]||<br />
|-<br />
|[http://linuxconcloudopenna2013.sched.org/event/b50b23f3ed3bd728fa0052b54021a2cc#.UgkeQ2SG2hU OpenZFS on Linux: How the Linux, FreeBSD, and Illumos Communities are Joining Forces to Continue Improving Open-Source ZFS]||Matt Ahrens and Brian Behlendorf||[http://events.linuxfoundation.org/events/linuxcon-north-america LinuxCon North America]||September 17, 2013 ||New Orleans, USA||[http://www.slideshare.net/MatthewAhrens/open-zfs-linuxcon slides]||<br />
|-<br />
|[http://2013.eurobsdcon.org/eurobsdcon-2013/talks/#AhrensMatuska OpenZFS: Upcoming Features and Performance Enhancements with illumos and FreeBSD joining Forces]<br />
| Matt Ahrens,<br>Martin Matuška<br />
|[http://2013.eurobsdcon.org/ EuroBSDCon 2013]<br />
|September 28, 2013 <br />
|Malta<br />
|[[File:OpenZFS-EuroBSDcon.pdf | PDF]], [http://www.slideshare.net/MatthewAhrens/open-zfs-eurobsdcon SlideShare]<br />
|<br />
|-<br />
|[http://www.nosig.org/ARCHIVE/1oct2013/agenda-1oct2013.html The OpenZFS project]<br />
|Matt Ahrens<br />
|[https://blogs.oracle.com/bartm/entry/the_birth_of_nosig_the NOSIG]<br />
|October 1, 2013<br />
|Amsterdam<br />
|<br />
|[http://www.youtube.com/watch?v=QMVnPKhvUlE video]<br />
|-<br />
|Everything OpenZFS<br />
|Matt Ahrens<br />
|[[OpenZFS Office Hours]]<br />
|October 11, 2013<br />
|YouTube + IRC<br />
|<br />
|[http://youtu.be/G2vIdPmsnTI video]<br />
|-<br />
|[http://www.openserversummit.com/English/Conference/Seminar_Session_Descriptions.html#SD104 OpenZFS: the future of open-source ZFS development]<br />
|[[User:Mahrens | Matt Ahrens]], [[User:Gwilson | George Wilson]]<br />
|[http://www.openserversummit.com/ OpenStorage Summit]<br />
|October 23, 2013<br />
|Santa Clara, CA<br />
|<br />
|<br />
|-<br />
|[https://www.usenix.org/conference/lisa13/systems-performance Systems Performance]<br />
|Brendan Gregg<br />
|[https://www.usenix.org/conference/lisa13 LISA '13]<br />
|November 2013<br />
|Washington, D.C.<br />
|<br />
|[https://www.usenix.org/conference/lisa13/systems-performance both]<br />
|-<br />
|[https://www.usenix.org/conference/lisa13/zfs-everyone ZFS for Everyone]<br />
|[[User:Gwilson | George Wilson]]<br />
|[https://www.usenix.org/conference/lisa13 LISA '13]<br />
|November 2013<br />
|Washington, D.C.<br />
|<br />
|[https://www.usenix.org/conference/lisa13/zfs-everyone both]<br />
|-<br />
|[https://www.usenix.org/conference/lisa13/zfs-depth ZFS in Depth]<br />
|[[User:Gwilson | George Wilson]]<br />
|[https://www.usenix.org/conference/lisa13 LISA '13]<br />
|November 2013<br />
|Washington, D.C.<br />
|<br />
|<br />
|-<br />
|[http://www.tech13.ukoug.org/default.asp?p=10186&dlgact=shwprs&prs_prsid=8896&day_dayid=74 ZFS for Databases]<br />
|[http://dtrace.org/blogs/ahl/ Adam Leventhal]<br />
|[http://www.tech13.ukoug.org/ UKOUG Tech13]<br />
|December 3, 2013<br />
|Manchester, UK<br />
|[http://www.slideshare.net/ahl0003/zfs-for-databases-28844118 Slides]<br />
|<br />
|-<br />
|[https://zfslondon.eventbrite.com/ ZFS Internals London 2013]<br />
|Max Bruning<br />
|<br />
|December 9-11, 2013<br />
|London<br />
|<br />
|<br />
|-<br />
|OpenZFS Office Hours with George Wilson<br />
|[[User:gwilson | George Wilson]]<br />
|[[OpenZFS Office Hours]]<br />
|December 12, 2013<br />
|YouTube, g+ hangout, and IRC<br />
|<br />
|[http://www.youtube.com/watch?v=wWmVW2R_uz8 video]<br />
|-<br />
|The OpenZFS Project<br />
|Andrew Gabriel<br />
|[http://www.ukoug.org/events/ukoug-solaris-sig-meeting-dec-2013/ UKOUG Solaris SIG Meeting]<br />
|December 18, 2013<br />
|London<br />
|visible to UKOUG members<br />
|<br />
|}</div>Grahamperrinhttps://openzfs.org/w/index.php?title=Talk:Distributions&diff=1323Talk:Distributions2014-01-27T15:48:29Z<p>Grahamperrin: Debian GNU/Linux ZFS Rescue Disc</p>
<hr />
<div>== MacZFS ==<br />
<br />
The [[MacZFS | MacZFS page]] in this wiki: <br />
<br />
* outlines the development and testing of ZFS-OSX<br />
* complements the [https://github.com/zfs-osx/zfs/blob/master/README.markdown readme file at the ZFS-OSX page] on GitHub<br />
* complements the [http://maczfs.org MacZFS site]. <br />
<br />
Expect an eventual migration of at least some content to the MacZFS site. <br />
<br />
--[[User:Grahamperrin|Grahamperrin]] ([[User talk:Grahamperrin|talk]]) 18:34, 6 October 2013 (UTC)<br />
<br />
== Shortlist of live CDs, DVDs et cetera ==<br />
<br />
… including '''rescue discs''' and the like. <br />
<br />
The following list arises from discussions in IRC. From this ''draft'' we might draw a table to help people who seek a CD, DVD or USB flash drive '''at short notice''' – a rescue situation, for example.<br />
<br />
(Beyond a draft: I don't imagine a ''complete'' set of information moving to the main [[distributions]] page. That's a very prominent main page – aim to keep it as tidy as possible for parade purposes.) <br />
<br />
In alphabetical order: <br />
<br />
=== Admin CD ===<br />
<br />
… ''add a link''<br />
<br />
"… maintained by one of the Gentoo developers …"<br />
<br />
=== Debian GNU/Linux ZFS Rescue Disc ===<br />
<br />
http://wiki.complete.org/ZFSRescueDisc<br />
<br />
Based on the debian-live rescue image, built with Linux kernel ZFS support from ZFS on Linux. Includes: <br />
<br />
* debian-zfs / zfsonlinux: ZFS metapackage and zfsonlinux repo signing key<br />
* zfs-dkms: ZFS kernel modules, built<br />
* grub-pc: GRUB with ZFS patches supporting /boot on ZFS<br />
* zfs-initramfs: initramfs scripts supporting booting with a ZFS root<br />
* zfsutils: command-line tools for managing ZFS filesystems. <br />
<br />
This disc is also useful for converting an existing installation to ZFS.<br />
<br />
=== Gentoo ===<br />
<br />
http://www.gentoo.org/main/en/where.xml<br />
<br />
… ''add a few words''<br />
<br />
=== OmniOS ===<br />
<br />
http://omnios.omniti.com/wiki.php/Installation<br />
<br />
… ''add a few words''<br />
<br />
=== OpenIndiana ===<br />
<br />
http://openindiana.org/download/<br />
<br />
http://wiki.openindiana.org/oi/Advanced+-+Manual+installation+of+OpenIndiana+from+LiveCD+media<br />
<br />
… ''need to summarise the levels of support for features that are associated with OpenZFS''<br />
<br />
=== SystemRescueCd ===<br />
<br />
http://www.sysresccd.org/SystemRescueCd_Homepage<br />
<br />
==== Funtoo-maintained ZFS editions ====<br />
<br />
systemrescuecd-x86-3.7.1-zfs.iso<br />
<br />
* http://jonathanvasquez.com/files/sysresccd/3.7.1/systemrescuecd-x86-3.7.1-zfs.iso, http://jonathanvasquez.com/files/sysresccd/3.7.1/<br />
* ISO dated 2013-08-02<br />
<br />
sysresccd-3.7.1_zfs_0.6.2.iso<br />
<br />
* http://ftp.osuosl.org/pub/funtoo/distfiles/sysresccd/sysresccd-3.7.1_zfs_0.6.2.iso, http://ftp.osuosl.org/pub/funtoo/distfiles/sysresccd/<br />
* ISO dated 2013-10-12<br />
<br />
=== ZFSguru ===<br />
<br />
"… FreeBDS 9.2 was released a few weeks ago … expect ZFSGuru to support v5000 any day now …"<br />
<br />
ZFSguru-LiveCD-0.2-beta8-amd64-normal.iso<br />
<br />
* http://zfsguru.com/download<br />
* ISO dated 2012-11-01<br />
<br />
… ''need to summarise the levels of support for features that are associated with OpenZFS''<br />
<br />
--[[User:Grahamperrin|Grahamperrin]] ([[User talk:Grahamperrin|talk]]) 23:27, 14 October 2013 (UTC)<br />
--[[User:Grahamperrin|Grahamperrin]] ([[User talk:Grahamperrin|talk]]) 15:48, 27 January 2014 (UTC)</div>Grahamperrinhttps://openzfs.org/w/index.php?title=OpenZFSOnOSX&diff=1306OpenZFSOnOSX2013-12-31T04:09:09Z<p>Grahamperrin: Deferring a package for use with Apple's Installer.app</p>
<hr />
<div>== MacZFS ==<br />
<br />
{|cellpadding="20" <br />
| [[file:MacZFS-logo.png | link=http://maczfs.org]]<br />
| http://maczfs.org<br />
The April 2013 release of MacZFS is stable, but lacks the feature set that's associated with OpenZFS …<br />
|}<br />
<br />
== ZFS-OSX ==<br />
<br />
'''ZFS-OSX brings OpenZFS features to MacZFS'''. <br />
<br />
[https://github.com/zfs-osx ZFS-OSX] is a well-developed alpha that is ready for testing by people who are happy to use Terminal. It's designed for use with Mac OS X 10.6 – OS X 10.9 (Snow Leopard, Lion, Mountain Lion and Mavericks).<br />
<br />
=== To begin testing the most recent build ===<br />
<br />
[http://zerobsd.tumblr.com/post/62586498252/os-x-with-zfs ZeroBSD | OS X with ZFS] offers an approach to obtaining the most recent code, building from that code and installing the built software. <br />
<br />
=== To test without building ===<br />
<br />
Disk images are ocasionally added to http://lundman.net/ftp/osx.zfs/ – aim for the most recent .dmg file. The image will contain built software – binaries, kernel extensions (KEXTs) and so on – that may be used with or without installation. <br />
<br />
These images are not designed to include the most recent fixes or enhancements. If in doubt, please ask in IRC: <br />
<br />
* irc://chat.freenode.net/#mac-zfs<br />
<br />
=== The simplest approach ===<br />
<br />
Expect a user-friendly package – for use with Apple's Installer.app – in due course.<br />
<br />
=== Suggested focus areas for testers ===<br />
<br />
A ZFS file system for your home directory<br />
* where ~ is the root of that file system. <br />
<br />
A ZFS file system containing multiple home directories. <br />
<br />
=== Notes ===<br />
<br />
ZFS-OSX is [https://github.com/zfs-osx/zfs/issues?direction=asc&sort=created&state=open not yet feature-complete]. <br />
<br />
Alpha software should not be used with data that is of significant value. Be thorough with your backups and please remember that ZFS alone is not a substitute for a good backup strategy.<br />
<br />
If you're limited to Leopard, or if you require the most stable MacZFS at this time, then instead of ZFS-OSX: consider relatively old version 74.3 of MacZFS.<br />
<br />
If you normally use MacZFS 74.3 or ZEVO: <br />
<br />
* you must uninstall that software before testing ZFS-OSX<br />
* you must uninstall ZFS-OSX before reverting to ZEVO or MacZFS 74.3<br />
<br />
– and [http://zevo.getgreenbytes.com/forum/viewtopic.php?p=5441#p5441 a restart of the Mac may be recommended].</div>Grahamperrinhttps://openzfs.org/w/index.php?title=Distributions&diff=1301Distributions2013-12-18T18:45:07Z<p>Grahamperrin: Versions 8.4 and 9.2 of FreeBSD are OpenZFS.</p>
<hr />
<div>Open source distributions of OpenZFS are available for the following open source platforms. <br />
<br />
(For commercial products, see [[companies]].)<br />
<br />
== Darwin ==<br />
<br />
{|cellpadding="15"<br />
|[[File:UNIX-based.jpg | link=http://www.opensource.apple.com]]<br />
|<br />
At the core of [http://blog.opengroup.org/2012/07/25/apple-registers-mac-os-x-10-8-mountain-lion-to-the-unix-03-standard/ Mac® OS X® Mountain Lion, which is certified to The Open Group UNIX® 03 standard], are [http://opensource.apple.com Apple® open source] [http://en.wikipedia.org/wiki/Darwin_(operating_system) Darwin] technologies. <br />
|}<br />
<br />
=== ZFS-OSX ===<br />
{|cellpadding="20" | width="100%"<br />
|<br />
ZFS-OSX brings OpenZFS features to [http://maczfs.org MacZFS]. <br />
<br />
[https://github.com/zfs-osx ZFS-OSX] is a well-developed alpha that is [[MacZFS | ready for testing]] by people who are happy to use Terminal. It's designed for use with Mac OS X 10.6 – OS X 10.9 (Snow Leopard, Lion, Mountain Lion and Mavericks). <br />
<br />
ZFS-OSX is a port of ZFS on Linux®. <br />
| align="right" valign="text-top"| [[file:MacZFS-logo.png | link=http://maczfs.org]]<br />
|}<br />
<br />
== FreeBSD® ==<br />
<br />
{|cellpadding="15"<br />
|[[file:FreeBSD-logo.png | 120px | link=http://www.freebsd.org/]]<br />
|<br />
A full general purpose operating system with several specialized distributions.<br />
|}<br />
<br />
=== Debian® GNU/kFreeBSD ===<br />
{|cellpadding="25" | width="100%"<br />
|<br />
[https://wiki.debian.org/Debian_GNU/kFreeBSD Debian® GNU/kFreeBSD] is a general purpose GNU distribution for amd64/i386 that uses the FreeBSD kernel, which provides an OpenZFS implementation.<br />
<br />
An official Debian release, still using GNU libc and with ninety percent of the same software packages available.<br />
<br />
The ''wheezy'' stable release:<br />
* can dual-boot 9.0 (default) or 8.3 kernels of FreeBSD<br />
* uses pool version 28 (deduplication, raidz3, removable log devices)<br />
* lacks support for ''ashift='', and important development tools like DTrace<br />
* installer supports creation of pools, installing to them, and booting directly from them with GRUB2.<br />
<br />
The ''testing'' release will be updated with new FreeBSD kernel releases, gaining many OpenZFS enhancements, including support for lz4 compression.<br />
| align="right" valign="text-top" | [[file:Debian-openlogo-100.jpg | 80px | link=https://wiki.debian.org/Debian_GNU/kFreeBSD]]<br />
|}<br />
<br />
=== FreeBSD ===<br />
{|cellpadding="10" | width="100%"<br />
|<br />
[http://www.freebsd.org/ FreeBSD] is a general purpose server operating system. Versions 8.4 and 9.2 are OpenZFS; prior versions lack the associated feature set.<br />
* [http://www.freebsd.org/releases/ Download]<br />
* browse ZFS source code in [https://github.com/freebsd/freebsd/tree/master/sys/cddl/contrib/opensolaris/uts/common/fs/zfs GitHub] or [http://svnweb.freebsd.org/base/head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/ websvn] or [http://nxr.netbsd.org/search?q=&project=src-freebsd OpenGrok].<br />
| align="right" valign="text-top" | [[file:FreeBSD-logo.png |120px|link=http://freebsd.org]]<br />
|}<br />
<br />
=== FreeNAS® ===<br />
{|cellpadding="10" | width="100%"<br />
|<br />
[http://www.freenas.org/ FreeNAS] is NAS appliance software.<br />
<br />
[http://www.ixsystems.com/storage/ix/truenas/ Commercial support] is available for sister product TrueNAS from iXsystems.<br />
| align="right" valign="text-top" | [[file:FreeNAS_Shark_Transparent_on_dark.png |120px|link=http://www.freenas.org/]]<br />
|}<br />
<br />
=== PC-BSD® ===<br />
{|cellpadding="10" | width="100%"<br />
|<br />
[http://www.pcbsd.org/ PC-BSD] is a workstation/desktop operating system.<br />
<br />
[http://www.ixsystems.com/support-center/ix/software/pc-bsd.html Commercial support] is available from iXsystems.<br />
| align="right" valign="text-top" | [[file:Pcbsd-logo.png|120px|link=http://www.pcbsd.org/]]<br />
|}<br />
<br />
== illumos ==<br />
{|cellpadding="15"<br />
|[[file:BigHighResPhoenixLogotypeRGB.png |120px|link=http://illumos.org]]<br />
|<br />
The [http://www.illumos.org illumos] codebase is the foundation for various distributions – comparable to the relationship between the Linux kernel and Linux distributions.<br />
The codebase originated as a fork from the last release of OpenSolaris.<br />
* Browse ZFS source code in [http://src.illumos.org/source/xref/illumos-gate/usr/src/uts/common/fs/zfs opengrok] or [https://github.com/illumos/illumos-gate/tree/master/usr/src/uts/common/fs/zfs GitHub].<br />
|}<br />
<br />
=== OmniOS ===<br />
{|cellpadding="15" | width="100%"<br />
|<br />
[http://omnios.omniti.com/ OmniOS] is a general purpose server operating system. <br />
<br />
[http://omniti.com/does/omnios Commercial support] is available from [http://omniti.com/ OmniTI].<br />
<br />
* [http://omnios.omniti.com/wiki.php/Installation Download]<br />
* [https://github.com/omniti-labs/illumos-omnios/tree/master/usr/src/uts/common/fs/zfs source code]<br />
| align="right" valign="text-top"| [[file:OmniOS_logo.png |100px|link=http://omnios.omniti.com/]]<br />
|}<br />
<br />
=== OpenIndiana ===<br />
{|cellpadding="8" | width="100%"<br />
|<br />
[http://openindiana.org/ OpenIndiana] (OI) is a general purpose server operating system.<br />
<br />
* [http://openindiana.org/download/ Download]<br />
* [https://hg.openindiana.org/ source code]<br />
| align="right" valign="text-top" | [[file:OpenIndiana_logo_x1200.png |120px|link=http://openindiana.org/]]<br />
|}<br />
<br />
=== SmartOS™ ===<br />
{|cellpadding="8" | width="100%"<br />
|<br />
[http://smartos.org SmartOS] is a specialised type 1 hypervisor platform that is lean enough to run entirely in memory and powerful enough to run as much as you want to throw at it. Provisioning is blindingly fast, thanks to zones and ZFS file system creation. SmartOS is a fundamental component of the [http://www.joyent.com/products/private-cloud Joyent® SmartDataCenter™] (SDC) product.<br />
* [http://wiki.smartos.org/display/DOC/Download+SmartOS Download]<br />
* [https://github.com/joyent/smartos-live source code]<br />
| align="right" valign="text-top" | [[File:Smartos-stacked-blue.png | 120px | link= http://smartos.org]]<br />
|}<br />
<br />
== Linux ==<br />
<br />
Since its inception in the 1990s, the Linux operating system has become the most widely used software in the world.<br />
<br />
=== Gentoo ===<br />
{|cellpadding="10" | width="100%"<br />
|<br />
[http://www.gentoo.org Gentoo] provides first-party [[#ZFS_on_Linux | ZFS on Linux]] packages to itself and its derivatives. <br />
<br />
Gentoo can be automatically optimized and customized for just about any application or need. Extreme configurability, performance and a top-notch user and developer community are all hallmarks of the Gentoo experience.<br />
<br />
Derivatives include: <br />
| align="right" valign="text-top" | [[file:Gblend.png |80px|link=http://www.gentoo.org/]]<br />
|-<br />
|<br />
* [http://www.funtoo.org Funtoo Linux], which features native UTF-8 support enabled by default, a git-based, distributed Portage Tree and funtoo overlay, an enhanced Portage with more compact mini-manifest tree, automated imports of new Gentoo changes every 12 hours, GPT/GUID boot support and streamlined boot configuration, enhanced network configuration, up-to-date stable and current Funtoo stages, all built using Funtoo's Metro build tool<br />
| align="right" valign="text-top"| [[file:Funtoo.png |80px|link=http://www.funtoo.org]]<br />
|-<br />
|<br />
* [http://www.pentoo.ch Pentoo], a security-focused livecd<br />
| [[file:PentooLogo.jpeg |120px|link=http://www.pentoo.ch]]<br />
|-<br />
|<br />
* [http://www.sabayon.org Sabayon], which emanates substantially from Gentoo's testing branch. <br />
| [[file:Sabayon-logo.png |120px|link=http://www.sabayon.org]]<br />
|}<br />
<br />
=== ZFS on Linux ===<br />
{|cellpadding="10" | width="100%"<br />
|<br />
[http://www.zfsonlinux.org ZFS on Linux] provides self-building packages for Debian, Fedora, RHEL/CentOS/SL, Ubuntu and build instructions for several other distributions. <br />
* Implemented in the kernel <br />
* maintained in a code repository that is independent from the mainline kernel.<br />
| align="right" valign="text-top"| [[file:zfs-linux.png |100px|link=http://zfsonlinux.org/]]<br />
|}<br />
<br />
== OSv ==<br />
<br />
{|cellpadding="15"<br />
|<br />
[http://osv.io OSv] is a new operating system designed for the cloud. It only runs virtualized, and the only file system it supports is ZFS.<br />
* Implemented in the kernel <br />
* ZFS codebase forked from FreeBSD; but planning to move to open-zfs.org upstream ASAP.<br />
|[[file:osv.png |100px|link=http://osv.io/]]<br />
|}<br />
<br />
----<br />
<center>Distribution logos used with permission. All trademarks are the property of their respective owners.</center></div>Grahamperrinhttps://openzfs.org/w/index.php?title=Publications&diff=1299Publications2013-12-13T03:44:28Z<p>Grahamperrin: For a more intuitive initial mobile view (for greater initial disclosure): one heading level reduced.</p>
<hr />
<div>References to OpenZFS related publications and conference talk recordings.<br />
<br />
== Publications ==<br />
=== BSD ===<br />
{| class="wikitable"<br />
!Title!!Author!!Publication!!Issue!!Page!!Link<br />
|-<br />
|Tuning ZFS on FreeBSD||Martin Matuška||BSD Magazine||issue 08/2012(37)||p. 10-15||[http://bsdmag.org/magazine/1809-tuning-zfs-on-freebsd download]<br />
|-<br />
|ZFS and FreeBSD||Martin Matuška||BSD Magazine||issue 02/2011(19)||p. 10-13||[http://bsdmag.org/magazine/1638-zfs-and-freebsd download]<br />
|}<br />
<br />
== Conference talks ==<br />
Most recent talks are at the bottom.<br />
<br />
=== ZFS Day 2012 ===<br />
[http://zfsday.com/zfsday/ ZFS Day], October 2, 2012, San Francisco, CA<br />
{| class="wikitable"<br />
!Title!!Speaker!!Slides!!Video<br />
|-<br />
|ZFS State of the Union||Matt Ahrens||[http://zfsday.com/wp-content/uploads/2012/08/ZFS-Day-Matt-Ahrens.pdf slides]||[http://zfsday.com/zfsday/zfs-state-of-the-union-matt-ahrens/ video]<br />
|-<br />
|Making the Impossible Possible: Disposable Staging Environments At Scale||Eric Sproul||[http://zfsday.com/wp-content/uploads/2012/08/Disposable_Envs_at_Scale-1.pdf slides]||[http://zfsday.com/zfsday/making-the-impossible-possible-disposable-staging-environments-at-scale/ video]<br />
|-<br />
|Running Without a ZFS Root Pool||Bill Pijewski||[http://zfsday.com/wp-content/uploads/2012/08/zfsday_100212.pdf slides]||[http://zfsday.com/zfsday/running-without-a-zfs-root-pool/ video]<br />
|-<br />
|Productizing ZFS||Justin Gibbs, Will Andrews||||[http://zfsday.com/zfsday/productizing-zfs/ video]<br />
|-<br />
|ZFS for Linux Implementation||Brian Behlendorf||||[http://zfsday.com/zfsday/zfs-for-linux-implementation/ video]<br />
|-<br />
|Panel: The State of ZFS on...||||||[http://zfsday.com/zfsday/panel-the-state-of-zfs-on/ video]<br />
|-<br />
|ZFS Performance Analysis and Tools||Brendan Gregg||[http://www.slideshare.net/brendangregg/zfsperftools2012 slides]||[http://zfsday.com/zfsday/zfs-performance-analysis-and-tools/ video]<br />
|-<br />
|Architecting ZFS Solutions||Richard Elling||||[http://zfsday.com/zfsday/architecting-zfs-solutions/ video]<br />
|-<br />
|Hybrid Storage Pools: Using Disk and Flash with ZFS||Adam Leventhal||||[http://zfsday.com/zfsday/hybrid-storage-pools-using-disk-and-flash-with-zfs/ video]<br />
|-<br />
|ZFS: Darwin's Storage||Jonathan Halstuch||[http://www.racktopsystems.com/wp-content/uploads/2012/10/Darwins-storage-ZFS.pdf slides]||[http://zfsday.com/zfsday/zfs-darwins-storage/ video]<br />
|-<br />
|Y4K?||George Wilson||[http://zfsday.com/wp-content/uploads/2012/08/Why-4k_.pdf slides]||[http://zfsday.com/zfsday/y4k/ video]<br />
|}<br />
<br />
=== 2013 [[OpenZFS Developer Summit]] ===<br />
<br />
November 18th 2013, San Francisco<br />
<br />
{| class="wikitable"<br />
!Title!!Speaker!!Slides!!Video<br />
|-<br />
|Introduction||Matt Ahrens||[http://www.slideshare.net/MatthewAhrens/open-zfs-devsummit slides]||[https://www.youtube.com/watch?v=U3dMhpmQTrU&list=PLaUVvul17xSdWMBt5tAC8Hu7bbeWskD_q video]<br />
|-<br />
|Platform Panel||Brian Behlendorf, Jorgen Lundman, Chris Siden, Xin Li||-||[https://www.youtube.com/watch?v=U3dMhpmQTrU&list=PLaUVvul17xSdWMBt5tAC8Hu7bbeWskD_q video]<br />
|-<br />
|Platform-independent code repository||Matt Ahrens||[http://www.slideshare.net/MatthewAhrens/openzfs-code-repository slides]||[https://www.youtube.com/watch?v=U3dMhpmQTrU&list=PLaUVvul17xSdWMBt5tAC8Hu7bbeWskD_q video]<br />
|-<br />
|Storage Tiering||Boris Protopopov||[http://www.open-zfs.org/w/images/7/71/ZFS_tiering.pdf slides]||[https://www.youtube.com/watch?v=tm0NYEVS6qM&list=PLaUVvul17xSdWMBt5tAC8Hu7bbeWskD_q video]<br />
|-<br />
|Vendor Lightning Talks||Many||-||[https://www.youtube.com/watch?v=EGKek5sZ2Xw&list=PLaUVvul17xSdWMBt5tAC8Hu7bbeWskD_q video]<br />
|-<br />
|Community Planning||Karyn Ritter||[https://docs.google.com/presentation/d/1LCvQxcNSxUi-5-NUgVRKp68iMLOrepp1VRJxPrklBPY/pub?start=false&loop=false&delayms=3000 slides]||[https://www.youtube.com/watch?v=EGKek5sZ2Xw&list=PLaUVvul17xSdWMBt5tAC8Hu7bbeWskD_q video]<br />
|-<br />
|Channel Programs||Chris Siden, Max Grossman||[http://www.slideshare.net/MatthewAhrens/openzfs-channel-programs slides]||[https://www.youtube.com/watch?v=EGKek5sZ2Xw&list=PLaUVvul17xSdWMBt5tAC8Hu7bbeWskD_q video]<br />
|-<br />
|Test Coverage||John Kennedy||[http://www.slideshare.net/jwk404/open-zfs-111813-28528303 slides]||[https://www.youtube.com/watch?v=M5RnPZW0_Xk&list=PLaUVvul17xSdWMBt5tAC8Hu7bbeWskD_q video]<br />
|-<br />
|Performance Investigation||Adam Leventhal||[http://www.slideshare.net/ahl0003/openzfs-datadriven-performance slides]||[https://www.youtube.com/watch?v=w3-eppY7ICc&list=PLaUVvul17xSdWMBt5tAC8Hu7bbeWskD_q video]<br />
|-<br />
|Performance on full & fragmented pools||George Wilson||[http://www.slideshare.net/gw25295/pool-performance-28609362 slides]||[https://www.youtube.com/watch?v=UuscV_fSncY&list=PLaUVvul17xSdWMBt5tAC8Hu7bbeWskD_q video]<br />
|-<br />
|Scalability|| Kirill Davydychev ||-||[https://www.youtube.com/watch?v=hvoL6z8YKgM&list=PLaUVvul17xSdWMBt5tAC8Hu7bbeWskD_q video]<br />
|-<br />
|Virtual Memory Interactions|| Brian Behlendorf ||-||[https://www.youtube.com/watch?v=hvoL6z8YKgM&list=PLaUVvul17xSdWMBt5tAC8Hu7bbeWskD_q video]<br />
|-<br />
|Multi Tenancy|| Rob Mustacchi ||-||[https://www.youtube.com/watch?v=MLTX1i7UEL4&list=PLaUVvul17xSdWMBt5tAC8Hu7bbeWskD_q video]<br />
|-<br />
|Examining On-disk Format|| Max Bruning ||-||[https://www.youtube.com/watch?v=MLTX1i7UEL4&list=PLaUVvul17xSdWMBt5tAC8Hu7bbeWskD_q video]<br />
|}<br />
<br />
== Other conferences and events ==<br />
<br />
{| class="wikitable"<br />
!Title!!Speaker!!Event!!Date!!Location!!Slides!!Audio<br>/video<br />
|-<br />
|A closer look at the ZFS file system||Paweł Jakub Dawidek||[http://www.bsdcan.org/2008/ BSDCan 2008]||May 16-17, 2008||Ottawa, Canada||[http://www.bsdcan.org/2008/schedule/attachments/58_BSDCan2008-ZFSInternals.pdf slides]||[http://www.youtube.com/watch?v=5-CR3o-Q2CU video]<br />
|-<br />
|The future of ZFS in FreeBSD||Martin Matuška||[http://www.bsdday.eu/2011 BSD Day 2011]||November 5, 2011||Bratislava, Slovakia||[http://people.freebsd.org/~pgj/bsd_day(2011)/materials/02_mm_zfs.pdf slides]||[http://www.youtube.com/watch?v=QSeEtU0-aMQ video]<br />
|-<br />
|Tuning ZFS on FreeBSD||Martin Matuška||[http://2012.eurobsdcon.org EuroBSDCon 2012]||October 20-21, 2012||Warsaw, Poland||[http://blog.vx.sk/uploads/conferences/EuroBSDcon2012/zfs-tuning-handout.pdf slides]||[http://www.youtube.com/watch?v=PIpI7Ub6yjo video]<br />
|-<br />
|bsdtalk227 - ZFS with Matt Ahrens||Matt Ahrens||[http://bsdtalk.blogspot.com/2013/05/bsdtalk227-zfs-with-matt-ahrens.html BSDTalk]||May 17–18, 2013||Ottawa, Canada||||[http://cis01.uma.edu/~wbackman/bsdtalk/bsdtalk227.mp3 audio]<br />
|-<br />
|FreeBSD, Capsicum, GELI and ZFS as key components of a security appliance||Paweł Jakub Dawidek||[http://www.bsdcan.org/2013 BSDCan 2013]||May 17–18, 2013||Ottawa, Canada||||[https://www.youtube.com/watch?v=ErEdIq_nodA video]<br />
|-<br />
|OpenZFS @ BSDCan||Matthew Ahrens||[http://www.bsdcan.org/2013 BSDCan 2013]||May 17–18, 2013||Ottawa, Canada||[http://www.bsdcan.org/2013/schedule/attachments/241_BSDCan2013-ZFS-BOF.pdf slides]||<br />
|-<br />
|[http://linuxconcloudopenna2013.sched.org/event/b50b23f3ed3bd728fa0052b54021a2cc#.UgkeQ2SG2hU OpenZFS on Linux: How the Linux, FreeBSD, and Illumos Communities are Joining Forces to Continue Improving Open-Source ZFS]||Matt Ahrens and Brian Behlendorf||[http://events.linuxfoundation.org/events/linuxcon-north-america LinuxCon North America]||September 17, 2013 ||New Orleans, USA||[http://www.slideshare.net/MatthewAhrens/open-zfs-linuxcon slides]||<br />
|-<br />
|[http://2013.eurobsdcon.org/eurobsdcon-2013/talks/#AhrensMatuska OpenZFS: Upcoming Features and Performance Enhancements with illumos and FreeBSD joining Forces]<br />
| Matt Ahrens,<br>Martin Matuška<br />
|[http://2013.eurobsdcon.org/ EuroBSDCon 2013]<br />
|September 28, 2013 <br />
|Malta<br />
|[[File:OpenZFS-EuroBSDcon.pdf | PDF]], [http://www.slideshare.net/MatthewAhrens/open-zfs-eurobsdcon SlideShare]<br />
|<br />
|-<br />
|[http://www.nosig.org/ARCHIVE/1oct2013/agenda-1oct2013.html The OpenZFS project]<br />
|Matt Ahrens<br />
|[https://blogs.oracle.com/bartm/entry/the_birth_of_nosig_the NOSIG]<br />
|October 1, 2013<br />
|Amsterdam<br />
|<br />
|[http://www.youtube.com/watch?v=QMVnPKhvUlE video]<br />
|-<br />
|Everything OpenZFS<br />
|Matt Ahrens<br />
|[[OpenZFS Office Hours]]<br />
|October 11, 2013<br />
|YouTube + IRC<br />
|<br />
|[http://youtu.be/G2vIdPmsnTI video]<br />
|-<br />
|[http://www.openserversummit.com/English/Conference/Seminar_Session_Descriptions.html#SD104 OpenZFS: the future of open-source ZFS development]<br />
|[[User:Mahrens | Matt Ahrens]], [[User:Gwilson | George Wilson]]<br />
|[http://www.openserversummit.com/ OpenStorage Summit]<br />
|October 23, 2013<br />
|Santa Clara, CA<br />
|<br />
|<br />
|-<br />
|[https://www.usenix.org/conference/lisa13/systems-performance Systems Performance]<br />
|Brendan Gregg<br />
|[https://www.usenix.org/conference/lisa13 LISA '13]<br />
|November 2013<br />
|Washington, D.C.<br />
|<br />
|[https://www.usenix.org/conference/lisa13/systems-performance both]<br />
|-<br />
|[https://www.usenix.org/conference/lisa13/zfs-everyone ZFS for Everyone]<br />
|[[User:Gwilson | George Wilson]]<br />
|[https://www.usenix.org/conference/lisa13 LISA '13]<br />
|November 2013<br />
|Washington, D.C.<br />
|<br />
|[https://www.usenix.org/conference/lisa13/zfs-everyone both]<br />
|-<br />
|[https://www.usenix.org/conference/lisa13/zfs-depth ZFS in Depth]<br />
|[[User:Gwilson | George Wilson]]<br />
|[https://www.usenix.org/conference/lisa13 LISA '13]<br />
|November 2013<br />
|Washington, D.C.<br />
|<br />
|<br />
|-<br />
|[https://zfslondon.eventbrite.com/ ZFS Internals London 2013]<br />
|Max Bruning<br />
|<br />
|December 9-11, 2013<br />
|London<br />
|<br />
|<br />
|-<br />
|OpenZFS Office Hours with George Wilson<br />
|[[User:gwilson | George Wilson]]<br />
|[[OpenZFS Office Hours]]<br />
|December 12, 2013<br />
|YouTube, g+ hangout, and IRC<br />
|<br />
|[http://www.youtube.com/watch?v=wWmVW2R_uz8 video]<br />
|}</div>Grahamperrinhttps://openzfs.org/w/index.php?title=Main_Page&diff=1298Main Page2013-12-13T03:39:02Z<p>Grahamperrin: Video of OpenZFS Office Hours is now trimmed, and so there's no longer a need for the timed start.</p>
<hr />
<div><div id="mf-home"><br />
= Welcome to OpenZFS =<br />
__NOTOC__<br />
<br />
OpenZFS was [[announcement | announced in September 2013]] as the truly '''open source''' successor to the [[History | ZFS project]]. Our community '''brings together developers''' from the illumos, FreeBSD, Linux, and OS X [[distributions | platforms]], and a wide range of [[companies]] that build products on top of OpenZFS. <br />
<br />
OpenZFS is an '''outstanding storage platform''' that encompasses the functionality of traditional filesystems, volume managers, and more, with consistent reliability, functionality and performance across all [[distributions]]: <br />
<br />
{| class="wikitable"<br />
| '''illumos'''<br />
|[http://wiki.illumos.org/display/illumos/ZFS Webpage]<br />
|[https://github.com/illumos/illumos-gate/ GitHub]<br />
|-<br />
| '''FreeBSD'''<br />
|[https://wiki.freebsd.org/ZFS Webpage]<br />
|[https://github.com/freebsd/freebsd/ GitHub] <br />
|-<br />
| '''ZFS on Linux'''<br />
|[http://zfsonlinux.org/ Webpage]<br />
|[https://github.com/zfsonlinux/zfs/ GitHub]<br />
|-<br />
| '''ZFS-OSX'''<br />
|[http://maczfs.org MacZFS]<br />
|[https://github.com/zfs-osx/ GitHub]<br />
|}<br />
<br />
== Goals ==<br />
<br />
The high-level goals of OpenZFS are:<br />
* to '''raise awareness''' of the quality, utility, and availability of open source implementations of ZFS<br />
* to encourage '''open communication''' about ongoing efforts to improve open source ZFS<br />
* to ensure '''consistent reliability''', functionality, and performance of all distributions of ZFS.<br />
<br />
The main technical goal of OpenZFS is '''easier sharing of code''' between platforms. Strategies include:<br />
* creating a platform-independent [[mailing list]] for developers to review ZFS code and architecture changes from all platforms<br />
* smoothing the [[illumos integration process]]<br />
* making it easy to run both ztest and the ZFS test suite (TestRunner or STF based) on each platform<br />
* [[Reduce code differences | reducing code differences]] between the platforms.<br />
<br />
== What's new? ==<br />
<br />
October: [http://www.youtube.com/watch?v=QMVnPKhvUlE video] of Matt Ahrens' talk at [http://nosig.org/ NOSIG].<br />
<br />
November: [http://www.beginningwithi.com/2013/11/18/openzfs-developer-summit/ video] and [[Publications#2013_OpenZFS_Developer_Summit | slides]] from the [[OpenZFS Developer Summit]]. <br />
<br />
December 2013: [http://www.youtube.com/watch?v=wWmVW2R_uz8 video] of the second [[OpenZFS Office Hours]], hosted by [[User:gwilson | George Wilson]].<br />
<br />
== Site orientation ==<br />
* [[FAQ]]<br />
* How to [[participate]]<br />
* [[Companies]] with products that are based on OpenZFS<br />
* Download [[distributions]] that include OpenZFS<br />
* [[Events]] – the forthcoming [[OpenZFS Developer Summit]] and more<br />
* [[Developer resources]]<br />
** [[mailing list]]<br />
** [[illumos integration process]]<br />
** [[contributors]]<br />
** [[platform code differences]]<br />
** [[OpenZFS Office Hours]]<br />
** implementation<br />
*** [[Documentation/ZfsSend | ZFS send]]<br />
*** [[Documentation/Administrative Commands | administrative commands]]<br />
* [[Documentation]]<br />
** [[features]]<br />
** [[Publications| publications and conference talks]]<br />
** [[history]] – from ZFS to OpenZFS<br />
*** OpenZFS launch [[announcement]] – September 2013<br />
** [[performance tuning]]<br />
* [[Projects]]<br />
** [[reduce code differences]]<br />
** the [[Projects/ZFS Channel Programs | ZFS Channel Programs]] (ZCP) proposal<br />
* [[About OpenZFS]]<br />
<br />
[http://open-zfs.org/w/index.php?title=Special%3AAllPages&from=&to=&namespace=0&hideredirects=1 All main pages] (alphabetical order) …<br />
<br />
== Twitter ==<br />
<br />
<html><br />
<a class="twitter-timeline" href="https://twitter.com/OpenZFS" data-widget-id="378639669799288832">Tweets by @OpenZFS</a><br />
<script>!function(d,s,id){var js,fjs=d.getElementsByTagName(s)[0],p=/^http:/.test(d.location)?'http':'https';if(!d.getElementById(id)){js=d.createElement(s);js.id=id;js.src=p+"://platform.twitter.com/widgets.js";fjs.parentNode.insertBefore(js,fjs);}}(document,"script","twitter-wjs");</script><br />
<br />
<span><br />
<br><br />
<a href="https://twitter.com/openzfs" class="twitter-follow-button" data-show-count="true">Follow @openzfs</a><br />
<br><br />
<a href="https://twitter.com/share" class="twitter-share-button" data-via="OpenZFS">Tweet</a><br />
</span><br />
<script>!function(d,s,id){var js,fjs=d.getElementsByTagName(s)[0],p=/^http:/.test(d.location)?'http':'https';if(!d.getElementById(id)){js=d.createElement(s);js.id=id;js.src=p+'://platform.twitter.com/widgets.js';fjs.parentNode.insertBefore(js,fjs);}}(document, 'script', 'twitter-wjs');</script><br />
</html></div>Grahamperrinhttps://openzfs.org/w/index.php?title=OpenZFS_Office_Hours&diff=1297OpenZFS Office Hours2013-12-13T03:36:09Z<p>Grahamperrin: Video of OpenZFS Office Hours is now trimmed, and so there's no longer a need for the timed start.</p>
<hr />
<div>An opportunity to chat live with a ZFS expert (usually a developer) about their work. Depending on who shows up, it could be an interview, a lecture on ZFS internals, or a discussion of how to get the best performance from ZFS in a particular situation.<br />
<br />
== Most recent event ==<br />
<br />
Office Hours with George Wilson was held on December 12th. You can view the recording [http://www.youtube.com/watch?v=wWmVW2R_uz8 on YouTube] or in the embedded viewer below:<br />
<br />
<html><br />
<iframe width="420" height="315" src="http://www.youtube.com/embed/wWmVW2R_uz8" frameborder="0" allowfullscreen></iframe><br />
</html><br />
<br />
== Future events ==<br />
<br />
Hosts will include: <br />
* [[User:Behlendorf | Brian Behlendorf]]<br />
* Andriy Gapon (FreeBSD®/ZFS kernel dev at HybridCluster)<br />
* [[User:Ryao | Richard Yao]].<br />
<br />
== Event listing ==<br />
<br />
{| class="wikitable"<br />
!Topic<br />
!Speakers<br />
!Date and time<br />
!Venue<br />
|-<br />
| Everything OpenZFS<br />
| [[User:mahrens | Matt Ahrens]]<br />
| October 11, 2013<br />
| [http://youtu.be/G2vIdPmsnTI video]<br />
|-<br />
| Everything OpenZFS<br />
| [[User:gwilson | George Wilson]]<br />
| 9AM-10AM PST ([http://www.timeanddate.com/worldclock/converted.html?iso=20131212T09&p1=137&p2=0 17:00 UTC]), December 12, 2013<br />
| [http://www.youtube.com/watch?v=wWmVW2R_uz8 video]<br />
|}<br />
<br />
== Participation ==<br />
<br />
Fifteen minutes before each event: <br />
<br />
* '''this webpage will be updated''' with the specific Hangout and YouTube URLs.<br />
<br />
You can participate using the following technologies. <br />
<br />
=== Google+ ===<br />
<br />
[https://www.google.com/+/learnmore/hangouts/onair.html Google+ Hangouts On Air] require: <br />
<br />
* a Google+ account<br />
* a browser [https://www.google.com/tools/dlpage/hangoutplugin plug-in] (works on Mac, Windows, and Linux), or iOS or Android app<br />
<br />
This is the preferred option; latency will be lowest and you can interact via voice, video, and text. <br />
<br />
=== YouTube ===<br />
<br />
View and hear the conversation live<br />
<br />
* works even on FreeBSD and Solaris<br />
* ask questions via IRC<br />
* thirty second delay.<br />
<br />
=== IRC ===<br />
<br />
Ask questions on [irc://chat.freenode.net/#openzfs #openzfs] on freenode ([http://webchat.freenode.net/?channels=openzfs web interface]).<br />
<br />
View and hear answers via YouTube or the hangout; the host probably won't have time to type out responses.</div>Grahamperrinhttps://openzfs.org/w/index.php?title=OpenZFS_Office_Hours&diff=1296OpenZFS Office Hours2013-12-12T19:28:01Z<p>Grahamperrin: The start time (05:04) seems to not work for embedding. Sorry. Reverted to the original URL.</p>
<hr />
<div>An opportunity to chat live with a ZFS expert (usually a developer) about their work. Depending on who shows up, it could be an interview, a lecture on ZFS internals, or a discussion of how to get the best performance from ZFS in a particular situation.<br />
<br />
== Most recent event ==<br />
<br />
Office Hours with George Wilson was held on December 12th. You can view the recording [http://www.youtube.com/watch?v=wWmVW2R_uz8&t=5m4s on YouTube] or in the embedded viewer below:<br />
<br />
<html><br />
<iframe width="420" height="315" src="http://www.youtube.com/embed/wWmVW2R_uz8" frameborder="0" allowfullscreen></iframe><br />
</html><br />
<br />
== Future events ==<br />
<br />
Hosts will include: <br />
* [[User:Behlendorf | Brian Behlendorf]]<br />
* Andriy Gapon (FreeBSD®/ZFS kernel dev at HybridCluster)<br />
* [[User:Ryao | Richard Yao]].<br />
<br />
== Event listing ==<br />
<br />
{| class="wikitable"<br />
!Topic<br />
!Speakers<br />
!Date and time<br />
!Venue<br />
|-<br />
| Everything OpenZFS<br />
| [[User:mahrens | Matt Ahrens]]<br />
| October 11, 2013<br />
| [http://youtu.be/G2vIdPmsnTI video]<br />
|-<br />
| Everything OpenZFS<br />
| [[User:gwilson | George Wilson]]<br />
| 9AM-10AM PST ([http://www.timeanddate.com/worldclock/converted.html?iso=20131212T09&p1=137&p2=0 17:00 UTC]), December 12, 2013<br />
| [http://www.youtube.com/watch?v=wWmVW2R_uz8&t=5m4s video]<br />
|}<br />
<br />
== Participation ==<br />
<br />
Fifteen minutes before each event: <br />
<br />
* '''this webpage will be updated''' with the specific Hangout and YouTube URLs.<br />
<br />
You can participate using the following technologies. <br />
<br />
=== Google+ ===<br />
<br />
[https://www.google.com/+/learnmore/hangouts/onair.html Google+ Hangouts On Air] require: <br />
<br />
* a Google+ account<br />
* a browser [https://www.google.com/tools/dlpage/hangoutplugin plug-in] (works on Mac, Windows, and Linux), or iOS or Android app<br />
<br />
This is the preferred option; latency will be lowest and you can interact via voice, video, and text. <br />
<br />
=== YouTube ===<br />
<br />
View and hear the conversation live<br />
<br />
* works even on FreeBSD and Solaris<br />
* ask questions via IRC<br />
* thirty second delay.<br />
<br />
=== IRC ===<br />
<br />
Ask questions on [irc://chat.freenode.net/#openzfs #openzfs] on freenode ([http://webchat.freenode.net/?channels=openzfs web interface]).<br />
<br />
View and hear answers via YouTube or the hangout; the host probably won't have time to type out responses.</div>Grahamperrinhttps://openzfs.org/w/index.php?title=OpenZFS_Office_Hours&diff=1295OpenZFS Office Hours2013-12-12T19:23:36Z<p>Grahamperrin: A start time for the video. Formatting to draw attention to the fifteen-minute countdown.</p>
<hr />
<div>An opportunity to chat live with a ZFS expert (usually a developer) about their work. Depending on who shows up, it could be an interview, a lecture on ZFS internals, or a discussion of how to get the best performance from ZFS in a particular situation.<br />
<br />
== Most recent event ==<br />
<br />
Office Hours with George Wilson was held on December 12th. You can view the recording [http://www.youtube.com/watch?v=wWmVW2R_uz8&t=5m4s on YouTube] or in the embedded viewer below:<br />
<br />
<html><br />
<iframe width="420" height="315" src="http://www.youtube.com/embed/wWmVW2R_uz8&t=5m4s" frameborder="0" allowfullscreen></iframe><br />
</html><br />
<br />
== Future events ==<br />
<br />
Hosts will include: <br />
* [[User:Behlendorf | Brian Behlendorf]]<br />
* Andriy Gapon (FreeBSD®/ZFS kernel dev at HybridCluster)<br />
* [[User:Ryao | Richard Yao]].<br />
<br />
== Event listing ==<br />
<br />
{| class="wikitable"<br />
!Topic<br />
!Speakers<br />
!Date and time<br />
!Venue<br />
|-<br />
| Everything OpenZFS<br />
| [[User:mahrens | Matt Ahrens]]<br />
| October 11, 2013<br />
| [http://youtu.be/G2vIdPmsnTI video]<br />
|-<br />
| Everything OpenZFS<br />
| [[User:gwilson | George Wilson]]<br />
| 9AM-10AM PST ([http://www.timeanddate.com/worldclock/converted.html?iso=20131212T09&p1=137&p2=0 17:00 UTC]), December 12, 2013<br />
| [http://www.youtube.com/watch?v=wWmVW2R_uz8&t=5m4s video]<br />
|}<br />
<br />
== Participation ==<br />
<br />
Fifteen minutes before each event: <br />
<br />
* '''this webpage will be updated''' with the specific Hangout and YouTube URLs.<br />
<br />
You can participate using the following technologies. <br />
<br />
=== Google+ ===<br />
<br />
[https://www.google.com/+/learnmore/hangouts/onair.html Google+ Hangouts On Air] require: <br />
<br />
* a Google+ account<br />
* a browser [https://www.google.com/tools/dlpage/hangoutplugin plug-in] (works on Mac, Windows, and Linux), or iOS or Android app<br />
<br />
This is the preferred option; latency will be lowest and you can interact via voice, video, and text. <br />
<br />
=== YouTube ===<br />
<br />
View and hear the conversation live<br />
<br />
* works even on FreeBSD and Solaris<br />
* ask questions via IRC<br />
* thirty second delay.<br />
<br />
=== IRC ===<br />
<br />
Ask questions on [irc://chat.freenode.net/#openzfs #openzfs] on freenode ([http://webchat.freenode.net/?channels=openzfs web interface]).<br />
<br />
View and hear answers via YouTube or the hangout; the host probably won't have time to type out responses.</div>Grahamperrinhttps://openzfs.org/w/index.php?title=Main_Page&diff=1291Main Page2013-12-12T18:48:38Z<p>Grahamperrin: George Wilson's OpenZFS Office Hours ended a short while ago. Link to video, starting at 5:02.</p>
<hr />
<div><div id="mf-home"><br />
= Welcome to OpenZFS =<br />
__NOTOC__<br />
<br />
OpenZFS was [[announcement | announced in September 2013]] as the truly '''open source''' successor to the [[History | ZFS project]]. Our community '''brings together developers''' from the illumos, FreeBSD, Linux, and OS X [[distributions | platforms]], and a wide range of [[companies]] that build products on top of OpenZFS. <br />
<br />
OpenZFS is an '''outstanding storage platform''' that encompasses the functionality of traditional filesystems, volume managers, and more, with consistent reliability, functionality and performance across all [[distributions]]: <br />
<br />
{| class="wikitable"<br />
| '''illumos'''<br />
|[http://wiki.illumos.org/display/illumos/ZFS Webpage]<br />
|[https://github.com/illumos/illumos-gate/ GitHub]<br />
|-<br />
| '''FreeBSD'''<br />
|[https://wiki.freebsd.org/ZFS Webpage]<br />
|[https://github.com/freebsd/freebsd/ GitHub] <br />
|-<br />
| '''ZFS on Linux'''<br />
|[http://zfsonlinux.org/ Webpage]<br />
|[https://github.com/zfsonlinux/zfs/ GitHub]<br />
|-<br />
| '''ZFS-OSX'''<br />
|[http://maczfs.org MacZFS]<br />
|[https://github.com/zfs-osx/ GitHub]<br />
|}<br />
<br />
== Goals ==<br />
<br />
The high-level goals of OpenZFS are:<br />
* to '''raise awareness''' of the quality, utility, and availability of open source implementations of ZFS<br />
* to encourage '''open communication''' about ongoing efforts to improve open source ZFS<br />
* to ensure '''consistent reliability''', functionality, and performance of all distributions of ZFS.<br />
<br />
The main technical goal of OpenZFS is '''easier sharing of code''' between platforms. Strategies include:<br />
* creating a platform-independent [[mailing list]] for developers to review ZFS code and architecture changes from all platforms<br />
* smoothing the [[illumos integration process]]<br />
* making it easy to run both ztest and the ZFS test suite (TestRunner or STF based) on each platform<br />
* [[Reduce code differences | reducing code differences]] between the platforms.<br />
<br />
== What's new? ==<br />
<br />
October: [http://www.youtube.com/watch?v=QMVnPKhvUlE video] of Matt Ahrens' talk at [http://nosig.org/ NOSIG].<br />
<br />
November: [http://www.beginningwithi.com/2013/11/18/openzfs-developer-summit/ video] and [[Publications#2013_OpenZFS_Developer_Summit | slides]] from the [[OpenZFS Developer Summit]]. <br />
<br />
December 2013: [http://www.youtube.com/watch?v=wWmVW2R_uz8&t=5m2s video] of the second [[OpenZFS Office Hours]], hosted by [[User:gwilson | George Wilson]].<br />
<br />
== Site orientation ==<br />
* [[FAQ]]<br />
* How to [[participate]]<br />
* [[Companies]] with products that are based on OpenZFS<br />
* Download [[distributions]] that include OpenZFS<br />
* [[Events]] – the forthcoming [[OpenZFS Developer Summit]] and more<br />
* [[Developer resources]]<br />
** [[mailing list]]<br />
** [[illumos integration process]]<br />
** [[contributors]]<br />
** [[platform code differences]]<br />
** [[OpenZFS Office Hours]]<br />
** implementation<br />
*** [[Documentation/ZfsSend | ZFS send]]<br />
*** [[Documentation/Administrative Commands | administrative commands]]<br />
* [[Documentation]]<br />
** [[features]]<br />
** [[Publications| publications and conference talks]]<br />
** [[history]] – from ZFS to OpenZFS<br />
*** OpenZFS launch [[announcement]] – September 2013<br />
** [[performance tuning]]<br />
* [[Projects]]<br />
** [[reduce code differences]]<br />
** the [[Projects/ZFS Channel Programs | ZFS Channel Programs]] (ZCP) proposal<br />
* [[About OpenZFS]]<br />
<br />
[http://open-zfs.org/w/index.php?title=Special%3AAllPages&from=&to=&namespace=0&hideredirects=1 All main pages] (alphabetical order) …<br />
<br />
== Twitter ==<br />
<br />
<html><br />
<a class="twitter-timeline" href="https://twitter.com/OpenZFS" data-widget-id="378639669799288832">Tweets by @OpenZFS</a><br />
<script>!function(d,s,id){var js,fjs=d.getElementsByTagName(s)[0],p=/^http:/.test(d.location)?'http':'https';if(!d.getElementById(id)){js=d.createElement(s);js.id=id;js.src=p+"://platform.twitter.com/widgets.js";fjs.parentNode.insertBefore(js,fjs);}}(document,"script","twitter-wjs");</script><br />
<br />
<span><br />
<br><br />
<a href="https://twitter.com/openzfs" class="twitter-follow-button" data-show-count="true">Follow @openzfs</a><br />
<br><br />
<a href="https://twitter.com/share" class="twitter-share-button" data-via="OpenZFS">Tweet</a><br />
</span><br />
<script>!function(d,s,id){var js,fjs=d.getElementsByTagName(s)[0],p=/^http:/.test(d.location)?'http':'https';if(!d.getElementById(id)){js=d.createElement(s);js.id=id;js.src=p+'://platform.twitter.com/widgets.js';fjs.parentNode.insertBefore(js,fjs);}}(document, 'script', 'twitter-wjs');</script><br />
</html></div>Grahamperrinhttps://openzfs.org/w/index.php?title=Publications&diff=1289Publications2013-12-12T18:37:50Z<p>Grahamperrin: Max Bruning's event is past.</p>
<hr />
<div>References to OpenZFS related publications and conference talk recordings.<br />
<br />
== Publications ==<br />
=== BSD ===<br />
{| class="wikitable"<br />
!Title!!Author!!Publication!!Issue!!Page!!Link<br />
|-<br />
|Tuning ZFS on FreeBSD||Martin Matuška||BSD Magazine||issue 08/2012(37)||p. 10-15||[http://bsdmag.org/magazine/1809-tuning-zfs-on-freebsd download]<br />
|-<br />
|ZFS and FreeBSD||Martin Matuška||BSD Magazine||issue 02/2011(19)||p. 10-13||[http://bsdmag.org/magazine/1638-zfs-and-freebsd download]<br />
|}<br />
<br />
== Conference talks ==<br />
Most recent talks are at the bottom.<br />
<br />
=== ZFS Day 2012 ===<br />
[http://zfsday.com/zfsday/ ZFS Day], October 2, 2012, San Francisco, CA<br />
{| class="wikitable"<br />
!Title!!Speaker!!Slides!!Video<br />
|-<br />
|ZFS State of the Union||Matt Ahrens||[http://zfsday.com/wp-content/uploads/2012/08/ZFS-Day-Matt-Ahrens.pdf slides]||[http://zfsday.com/zfsday/zfs-state-of-the-union-matt-ahrens/ video]<br />
|-<br />
|Making the Impossible Possible: Disposable Staging Environments At Scale||Eric Sproul||[http://zfsday.com/wp-content/uploads/2012/08/Disposable_Envs_at_Scale-1.pdf slides]||[http://zfsday.com/zfsday/making-the-impossible-possible-disposable-staging-environments-at-scale/ video]<br />
|-<br />
|Running Without a ZFS Root Pool||Bill Pijewski||[http://zfsday.com/wp-content/uploads/2012/08/zfsday_100212.pdf slides]||[http://zfsday.com/zfsday/running-without-a-zfs-root-pool/ video]<br />
|-<br />
|Productizing ZFS||Justin Gibbs, Will Andrews||||[http://zfsday.com/zfsday/productizing-zfs/ video]<br />
|-<br />
|ZFS for Linux Implementation||Brian Behlendorf||||[http://zfsday.com/zfsday/zfs-for-linux-implementation/ video]<br />
|-<br />
|Panel: The State of ZFS on...||||||[http://zfsday.com/zfsday/panel-the-state-of-zfs-on/ video]<br />
|-<br />
|ZFS Performance Analysis and Tools||Brendan Gregg||[http://www.slideshare.net/brendangregg/zfsperftools2012 slides]||[http://zfsday.com/zfsday/zfs-performance-analysis-and-tools/ video]<br />
|-<br />
|Architecting ZFS Solutions||Richard Elling||||[http://zfsday.com/zfsday/architecting-zfs-solutions/ video]<br />
|-<br />
|Hybrid Storage Pools: Using Disk and Flash with ZFS||Adam Leventhal||||[http://zfsday.com/zfsday/hybrid-storage-pools-using-disk-and-flash-with-zfs/ video]<br />
|-<br />
|ZFS: Darwin's Storage||Jonathan Halstuch||[http://www.racktopsystems.com/wp-content/uploads/2012/10/Darwins-storage-ZFS.pdf slides]||[http://zfsday.com/zfsday/zfs-darwins-storage/ video]<br />
|-<br />
|Y4K?||George Wilson||[http://zfsday.com/wp-content/uploads/2012/08/Why-4k_.pdf slides]||[http://zfsday.com/zfsday/y4k/ video]<br />
|}<br />
<br />
=== 2013 [[OpenZFS Developer Summit]] ===<br />
<br />
November 18th 2013, San Francisco<br />
<br />
{| class="wikitable"<br />
!Title!!Speaker!!Slides!!Video<br />
|-<br />
|Introduction||Matt Ahrens||[http://www.slideshare.net/MatthewAhrens/open-zfs-devsummit slides]||[https://www.youtube.com/watch?v=U3dMhpmQTrU&list=PLaUVvul17xSdWMBt5tAC8Hu7bbeWskD_q video]<br />
|-<br />
|Platform Panel||Brian Behlendorf, Jorgen Lundman, Chris Siden, Xin Li||-||[https://www.youtube.com/watch?v=U3dMhpmQTrU&list=PLaUVvul17xSdWMBt5tAC8Hu7bbeWskD_q video]<br />
|-<br />
|Platform-independent code repository||Matt Ahrens||[http://www.slideshare.net/MatthewAhrens/openzfs-code-repository slides]||[https://www.youtube.com/watch?v=U3dMhpmQTrU&list=PLaUVvul17xSdWMBt5tAC8Hu7bbeWskD_q video]<br />
|-<br />
|Storage Tiering||Boris Protopopov||[http://www.open-zfs.org/w/images/7/71/ZFS_tiering.pdf slides]||[https://www.youtube.com/watch?v=tm0NYEVS6qM&list=PLaUVvul17xSdWMBt5tAC8Hu7bbeWskD_q video]<br />
|-<br />
|Vendor Lightning Talks||Many||-||[https://www.youtube.com/watch?v=EGKek5sZ2Xw&list=PLaUVvul17xSdWMBt5tAC8Hu7bbeWskD_q video]<br />
|-<br />
|Community Planning||Karyn Ritter||[https://docs.google.com/presentation/d/1LCvQxcNSxUi-5-NUgVRKp68iMLOrepp1VRJxPrklBPY/pub?start=false&loop=false&delayms=3000 slides]||[https://www.youtube.com/watch?v=EGKek5sZ2Xw&list=PLaUVvul17xSdWMBt5tAC8Hu7bbeWskD_q video]<br />
|-<br />
|Channel Programs||Chris Siden, Max Grossman||[http://www.slideshare.net/MatthewAhrens/openzfs-channel-programs slides]||[https://www.youtube.com/watch?v=EGKek5sZ2Xw&list=PLaUVvul17xSdWMBt5tAC8Hu7bbeWskD_q video]<br />
|-<br />
|Test Coverage||John Kennedy||[http://www.slideshare.net/jwk404/open-zfs-111813-28528303 slides]||[https://www.youtube.com/watch?v=M5RnPZW0_Xk&list=PLaUVvul17xSdWMBt5tAC8Hu7bbeWskD_q video]<br />
|-<br />
|Performance Investigation||Adam Leventhal||[http://www.slideshare.net/ahl0003/openzfs-datadriven-performance slides]||[https://www.youtube.com/watch?v=w3-eppY7ICc&list=PLaUVvul17xSdWMBt5tAC8Hu7bbeWskD_q video]<br />
|-<br />
|Performance on full & fragmented pools||George Wilson||[http://www.slideshare.net/gw25295/pool-performance-28609362 slides]||[https://www.youtube.com/watch?v=UuscV_fSncY&list=PLaUVvul17xSdWMBt5tAC8Hu7bbeWskD_q video]<br />
|-<br />
|Scalability|| Kirill Davydychev ||-||[https://www.youtube.com/watch?v=hvoL6z8YKgM&list=PLaUVvul17xSdWMBt5tAC8Hu7bbeWskD_q video]<br />
|-<br />
|Virtual Memory Interactions|| Brian Behlendorf ||-||[https://www.youtube.com/watch?v=hvoL6z8YKgM&list=PLaUVvul17xSdWMBt5tAC8Hu7bbeWskD_q video]<br />
|-<br />
|Multi Tenancy|| Rob Mustacchi ||-||[https://www.youtube.com/watch?v=MLTX1i7UEL4&list=PLaUVvul17xSdWMBt5tAC8Hu7bbeWskD_q video]<br />
|-<br />
|Examining On-disk Format|| Max Bruning ||-||[https://www.youtube.com/watch?v=MLTX1i7UEL4&list=PLaUVvul17xSdWMBt5tAC8Hu7bbeWskD_q video]<br />
|}<br />
<br />
=== Other conferences and events ===<br />
{| class="wikitable"<br />
!Title!!Speaker!!Event!!Date!!Location!!Slides!!Audio<br>/video<br />
|-<br />
|A closer look at the ZFS file system||Paweł Jakub Dawidek||[http://www.bsdcan.org/2008/ BSDCan 2008]||May 16-17, 2008||Ottawa, Canada||[http://www.bsdcan.org/2008/schedule/attachments/58_BSDCan2008-ZFSInternals.pdf slides]||[http://www.youtube.com/watch?v=5-CR3o-Q2CU video]<br />
|-<br />
|The future of ZFS in FreeBSD||Martin Matuška||[http://www.bsdday.eu/2011 BSD Day 2011]||November 5, 2011||Bratislava, Slovakia||[http://people.freebsd.org/~pgj/bsd_day(2011)/materials/02_mm_zfs.pdf slides]||[http://www.youtube.com/watch?v=QSeEtU0-aMQ video]<br />
|-<br />
|Tuning ZFS on FreeBSD||Martin Matuška||[http://2012.eurobsdcon.org EuroBSDCon 2012]||October 20-21, 2012||Warsaw, Poland||[http://blog.vx.sk/uploads/conferences/EuroBSDcon2012/zfs-tuning-handout.pdf slides]||[http://www.youtube.com/watch?v=PIpI7Ub6yjo video]<br />
|-<br />
|bsdtalk227 - ZFS with Matt Ahrens||Matt Ahrens||[http://bsdtalk.blogspot.com/2013/05/bsdtalk227-zfs-with-matt-ahrens.html BSDTalk]||May 17–18, 2013||Ottawa, Canada||||[http://cis01.uma.edu/~wbackman/bsdtalk/bsdtalk227.mp3 audio]<br />
|-<br />
|FreeBSD, Capsicum, GELI and ZFS as key components of a security appliance||Paweł Jakub Dawidek||[http://www.bsdcan.org/2013 BSDCan 2013]||May 17–18, 2013||Ottawa, Canada||||[https://www.youtube.com/watch?v=ErEdIq_nodA video]<br />
|-<br />
|OpenZFS @ BSDCan||Matthew Ahrens||[http://www.bsdcan.org/2013 BSDCan 2013]||May 17–18, 2013||Ottawa, Canada||[http://www.bsdcan.org/2013/schedule/attachments/241_BSDCan2013-ZFS-BOF.pdf slides]||<br />
|-<br />
|[http://linuxconcloudopenna2013.sched.org/event/b50b23f3ed3bd728fa0052b54021a2cc#.UgkeQ2SG2hU OpenZFS on Linux: How the Linux, FreeBSD, and Illumos Communities are Joining Forces to Continue Improving Open-Source ZFS]||Matt Ahrens and Brian Behlendorf||[http://events.linuxfoundation.org/events/linuxcon-north-america LinuxCon North America]||September 17, 2013 ||New Orleans, USA||[http://www.slideshare.net/MatthewAhrens/open-zfs-linuxcon slides]||<br />
|-<br />
|[http://2013.eurobsdcon.org/eurobsdcon-2013/talks/#AhrensMatuska OpenZFS: Upcoming Features and Performance Enhancements with illumos and FreeBSD joining Forces]<br />
| Matt Ahrens,<br>Martin Matuška<br />
|[http://2013.eurobsdcon.org/ EuroBSDCon 2013]<br />
|September 28, 2013 <br />
|Malta<br />
|[[File:OpenZFS-EuroBSDcon.pdf | PDF]], [http://www.slideshare.net/MatthewAhrens/open-zfs-eurobsdcon SlideShare]<br />
|<br />
|-<br />
|[http://www.nosig.org/ARCHIVE/1oct2013/agenda-1oct2013.html The OpenZFS project]<br />
|Matt Ahrens<br />
|[https://blogs.oracle.com/bartm/entry/the_birth_of_nosig_the NOSIG]<br />
|October 1, 2013<br />
|Amsterdam<br />
|<br />
|[http://www.youtube.com/watch?v=QMVnPKhvUlE video]<br />
|-<br />
|Everything OpenZFS<br />
|Matt Ahrens<br />
|[[OpenZFS Office Hours]]<br />
|October 11, 2013<br />
|YouTube + IRC<br />
|<br />
|[http://youtu.be/G2vIdPmsnTI video]<br />
|-<br />
|[http://www.openserversummit.com/English/Conference/Seminar_Session_Descriptions.html#SD104 OpenZFS: the future of open-source ZFS development]<br />
|[[User:Mahrens | Matt Ahrens]], [[User:Gwilson | George Wilson]]<br />
|[http://www.openserversummit.com/ OpenStorage Summit]<br />
|October 23, 2013<br />
|Santa Clara, CA<br />
|<br />
|<br />
|-<br />
|[https://www.usenix.org/conference/lisa13/systems-performance Systems Performance]<br />
|Brendan Gregg<br />
|[https://www.usenix.org/conference/lisa13 LISA '13]<br />
|November 2013<br />
|Washington, D.C.<br />
|<br />
|[https://www.usenix.org/conference/lisa13/systems-performance both]<br />
|-<br />
|[https://www.usenix.org/conference/lisa13/zfs-everyone ZFS for Everyone]<br />
|[[User:Gwilson | George Wilson]]<br />
|[https://www.usenix.org/conference/lisa13 LISA '13]<br />
|November 2013<br />
|Washington, D.C.<br />
|<br />
|[https://www.usenix.org/conference/lisa13/zfs-everyone both]<br />
|-<br />
|[https://www.usenix.org/conference/lisa13/zfs-depth ZFS in Depth]<br />
|[[User:Gwilson | George Wilson]]<br />
|[https://www.usenix.org/conference/lisa13 LISA '13]<br />
|November 2013<br />
|Washington, D.C.<br />
|<br />
|<br />
|-<br />
|[https://zfslondon.eventbrite.com/ ZFS Internals London 2013]<br />
|Max Bruning<br />
|<br />
|December 9-11, 2013<br />
|London<br />
|<br />
|<br />
|-<br />
|OpenZFS Office Hours with George Wilson<br />
|[[User:gwilson | George Wilson]]<br />
|[[OpenZFS Office Hours]]<br />
|December 12, 2013<br />
|YouTube, g+ hangout, and IRC<br />
|<br />
|[http://www.youtube.com/watch?v=wWmVW2R_uz8 video]<br />
|}</div>Grahamperrinhttps://openzfs.org/w/index.php?title=Publications&diff=1286Publications2013-12-12T18:28:55Z<p>Grahamperrin: Today's event is past.</p>
<hr />
<div>References to OpenZFS related publications and conference talk recordings.<br />
<br />
== Publications ==<br />
=== BSD ===<br />
{| class="wikitable"<br />
!Title!!Author!!Publication!!Issue!!Page!!Link<br />
|-<br />
|Tuning ZFS on FreeBSD||Martin Matuška||BSD Magazine||issue 08/2012(37)||p. 10-15||[http://bsdmag.org/magazine/1809-tuning-zfs-on-freebsd download]<br />
|-<br />
|ZFS and FreeBSD||Martin Matuška||BSD Magazine||issue 02/2011(19)||p. 10-13||[http://bsdmag.org/magazine/1638-zfs-and-freebsd download]<br />
|}<br />
<br />
== Conference talks ==<br />
Most recent talks are at the bottom.<br />
<br />
=== ZFS Day 2012 ===<br />
[http://zfsday.com/zfsday/ ZFS Day], October 2, 2012, San Francisco, CA<br />
{| class="wikitable"<br />
!Title!!Speaker!!Slides!!Video<br />
|-<br />
|ZFS State of the Union||Matt Ahrens||[http://zfsday.com/wp-content/uploads/2012/08/ZFS-Day-Matt-Ahrens.pdf slides]||[http://zfsday.com/zfsday/zfs-state-of-the-union-matt-ahrens/ video]<br />
|-<br />
|Making the Impossible Possible: Disposable Staging Environments At Scale||Eric Sproul||[http://zfsday.com/wp-content/uploads/2012/08/Disposable_Envs_at_Scale-1.pdf slides]||[http://zfsday.com/zfsday/making-the-impossible-possible-disposable-staging-environments-at-scale/ video]<br />
|-<br />
|Running Without a ZFS Root Pool||Bill Pijewski||[http://zfsday.com/wp-content/uploads/2012/08/zfsday_100212.pdf slides]||[http://zfsday.com/zfsday/running-without-a-zfs-root-pool/ video]<br />
|-<br />
|Productizing ZFS||Justin Gibbs, Will Andrews||||[http://zfsday.com/zfsday/productizing-zfs/ video]<br />
|-<br />
|ZFS for Linux Implementation||Brian Behlendorf||||[http://zfsday.com/zfsday/zfs-for-linux-implementation/ video]<br />
|-<br />
|Panel: The State of ZFS on...||||||[http://zfsday.com/zfsday/panel-the-state-of-zfs-on/ video]<br />
|-<br />
|ZFS Performance Analysis and Tools||Brendan Gregg||[http://www.slideshare.net/brendangregg/zfsperftools2012 slides]||[http://zfsday.com/zfsday/zfs-performance-analysis-and-tools/ video]<br />
|-<br />
|Architecting ZFS Solutions||Richard Elling||||[http://zfsday.com/zfsday/architecting-zfs-solutions/ video]<br />
|-<br />
|Hybrid Storage Pools: Using Disk and Flash with ZFS||Adam Leventhal||||[http://zfsday.com/zfsday/hybrid-storage-pools-using-disk-and-flash-with-zfs/ video]<br />
|-<br />
|ZFS: Darwin's Storage||Jonathan Halstuch||[http://www.racktopsystems.com/wp-content/uploads/2012/10/Darwins-storage-ZFS.pdf slides]||[http://zfsday.com/zfsday/zfs-darwins-storage/ video]<br />
|-<br />
|Y4K?||George Wilson||[http://zfsday.com/wp-content/uploads/2012/08/Why-4k_.pdf slides]||[http://zfsday.com/zfsday/y4k/ video]<br />
|}<br />
<br />
=== 2013 [[OpenZFS Developer Summit]] ===<br />
<br />
November 18th 2013, San Francisco<br />
<br />
{| class="wikitable"<br />
!Title!!Speaker!!Slides!!Video<br />
|-<br />
|Introduction||Matt Ahrens||[http://www.slideshare.net/MatthewAhrens/open-zfs-devsummit slides]||[https://www.youtube.com/watch?v=U3dMhpmQTrU&list=PLaUVvul17xSdWMBt5tAC8Hu7bbeWskD_q video]<br />
|-<br />
|Platform Panel||Brian Behlendorf, Jorgen Lundman, Chris Siden, Xin Li||-||[https://www.youtube.com/watch?v=U3dMhpmQTrU&list=PLaUVvul17xSdWMBt5tAC8Hu7bbeWskD_q video]<br />
|-<br />
|Platform-independent code repository||Matt Ahrens||[http://www.slideshare.net/MatthewAhrens/openzfs-code-repository slides]||[https://www.youtube.com/watch?v=U3dMhpmQTrU&list=PLaUVvul17xSdWMBt5tAC8Hu7bbeWskD_q video]<br />
|-<br />
|Storage Tiering||Boris Protopopov||[http://www.open-zfs.org/w/images/7/71/ZFS_tiering.pdf slides]||[https://www.youtube.com/watch?v=tm0NYEVS6qM&list=PLaUVvul17xSdWMBt5tAC8Hu7bbeWskD_q video]<br />
|-<br />
|Vendor Lightning Talks||Many||-||[https://www.youtube.com/watch?v=EGKek5sZ2Xw&list=PLaUVvul17xSdWMBt5tAC8Hu7bbeWskD_q video]<br />
|-<br />
|Community Planning||Karyn Ritter||[https://docs.google.com/presentation/d/1LCvQxcNSxUi-5-NUgVRKp68iMLOrepp1VRJxPrklBPY/pub?start=false&loop=false&delayms=3000 slides]||[https://www.youtube.com/watch?v=EGKek5sZ2Xw&list=PLaUVvul17xSdWMBt5tAC8Hu7bbeWskD_q video]<br />
|-<br />
|Channel Programs||Chris Siden, Max Grossman||[http://www.slideshare.net/MatthewAhrens/openzfs-channel-programs slides]||[https://www.youtube.com/watch?v=EGKek5sZ2Xw&list=PLaUVvul17xSdWMBt5tAC8Hu7bbeWskD_q video]<br />
|-<br />
|Test Coverage||John Kennedy||[http://www.slideshare.net/jwk404/open-zfs-111813-28528303 slides]||[https://www.youtube.com/watch?v=M5RnPZW0_Xk&list=PLaUVvul17xSdWMBt5tAC8Hu7bbeWskD_q video]<br />
|-<br />
|Performance Investigation||Adam Leventhal||[http://www.slideshare.net/ahl0003/openzfs-datadriven-performance slides]||[https://www.youtube.com/watch?v=w3-eppY7ICc&list=PLaUVvul17xSdWMBt5tAC8Hu7bbeWskD_q video]<br />
|-<br />
|Performance on full & fragmented pools||George Wilson||[http://www.slideshare.net/gw25295/pool-performance-28609362 slides]||[https://www.youtube.com/watch?v=UuscV_fSncY&list=PLaUVvul17xSdWMBt5tAC8Hu7bbeWskD_q video]<br />
|-<br />
|Scalability|| Kirill Davydychev ||-||[https://www.youtube.com/watch?v=hvoL6z8YKgM&list=PLaUVvul17xSdWMBt5tAC8Hu7bbeWskD_q video]<br />
|-<br />
|Virtual Memory Interactions|| Brian Behlendorf ||-||[https://www.youtube.com/watch?v=hvoL6z8YKgM&list=PLaUVvul17xSdWMBt5tAC8Hu7bbeWskD_q video]<br />
|-<br />
|Multi Tenancy|| Rob Mustacchi ||-||[https://www.youtube.com/watch?v=MLTX1i7UEL4&list=PLaUVvul17xSdWMBt5tAC8Hu7bbeWskD_q video]<br />
|-<br />
|Examining On-disk Format|| Max Bruning ||-||[https://www.youtube.com/watch?v=MLTX1i7UEL4&list=PLaUVvul17xSdWMBt5tAC8Hu7bbeWskD_q video]<br />
|}<br />
<br />
=== Other conferences and events ===<br />
{| class="wikitable"<br />
!Title!!Speaker!!Event!!Date!!Location!!Slides!!Audio<br>/video<br />
|-<br />
|A closer look at the ZFS file system||Paweł Jakub Dawidek||[http://www.bsdcan.org/2008/ BSDCan 2008]||May 16-17, 2008||Ottawa, Canada||[http://www.bsdcan.org/2008/schedule/attachments/58_BSDCan2008-ZFSInternals.pdf slides]||[http://www.youtube.com/watch?v=5-CR3o-Q2CU video]<br />
|-<br />
|The future of ZFS in FreeBSD||Martin Matuška||[http://www.bsdday.eu/2011 BSD Day 2011]||November 5, 2011||Bratislava, Slovakia||[http://people.freebsd.org/~pgj/bsd_day(2011)/materials/02_mm_zfs.pdf slides]||[http://www.youtube.com/watch?v=QSeEtU0-aMQ video]<br />
|-<br />
|Tuning ZFS on FreeBSD||Martin Matuška||[http://2012.eurobsdcon.org EuroBSDCon 2012]||October 20-21, 2012||Warsaw, Poland||[http://blog.vx.sk/uploads/conferences/EuroBSDcon2012/zfs-tuning-handout.pdf slides]||[http://www.youtube.com/watch?v=PIpI7Ub6yjo video]<br />
|-<br />
|bsdtalk227 - ZFS with Matt Ahrens||Matt Ahrens||[http://bsdtalk.blogspot.com/2013/05/bsdtalk227-zfs-with-matt-ahrens.html BSDTalk]||May 17–18, 2013||Ottawa, Canada||||[http://cis01.uma.edu/~wbackman/bsdtalk/bsdtalk227.mp3 audio]<br />
|-<br />
|FreeBSD, Capsicum, GELI and ZFS as key components of a security appliance||Paweł Jakub Dawidek||[http://www.bsdcan.org/2013 BSDCan 2013]||May 17–18, 2013||Ottawa, Canada||||[https://www.youtube.com/watch?v=ErEdIq_nodA video]<br />
|-<br />
|OpenZFS @ BSDCan||Matthew Ahrens||[http://www.bsdcan.org/2013 BSDCan 2013]||May 17–18, 2013||Ottawa, Canada||[http://www.bsdcan.org/2013/schedule/attachments/241_BSDCan2013-ZFS-BOF.pdf slides]||<br />
|-<br />
|[http://linuxconcloudopenna2013.sched.org/event/b50b23f3ed3bd728fa0052b54021a2cc#.UgkeQ2SG2hU OpenZFS on Linux: How the Linux, FreeBSD, and Illumos Communities are Joining Forces to Continue Improving Open-Source ZFS]||Matt Ahrens and Brian Behlendorf||[http://events.linuxfoundation.org/events/linuxcon-north-america LinuxCon North America]||September 17, 2013 ||New Orleans, USA||[http://www.slideshare.net/MatthewAhrens/open-zfs-linuxcon slides]||<br />
|-<br />
|[http://2013.eurobsdcon.org/eurobsdcon-2013/talks/#AhrensMatuska OpenZFS: Upcoming Features and Performance Enhancements with illumos and FreeBSD joining Forces]<br />
| Matt Ahrens,<br>Martin Matuška<br />
|[http://2013.eurobsdcon.org/ EuroBSDCon 2013]<br />
|September 28, 2013 <br />
|Malta<br />
|[[File:OpenZFS-EuroBSDcon.pdf | PDF]], [http://www.slideshare.net/MatthewAhrens/open-zfs-eurobsdcon SlideShare]<br />
|<br />
|-<br />
|[http://www.nosig.org/ARCHIVE/1oct2013/agenda-1oct2013.html The OpenZFS project]<br />
|Matt Ahrens<br />
|[https://blogs.oracle.com/bartm/entry/the_birth_of_nosig_the NOSIG]<br />
|October 1, 2013<br />
|Amsterdam<br />
|<br />
|[http://www.youtube.com/watch?v=QMVnPKhvUlE video]<br />
|-<br />
|Everything OpenZFS<br />
|Matt Ahrens<br />
|[[OpenZFS Office Hours]]<br />
|October 11, 2013<br />
|YouTube + IRC<br />
|<br />
|[http://youtu.be/G2vIdPmsnTI video]<br />
|-<br />
|[http://www.openserversummit.com/English/Conference/Seminar_Session_Descriptions.html#SD104 OpenZFS: the future of open-source ZFS development]<br />
|[[User:Mahrens | Matt Ahrens]], [[User:Gwilson | George Wilson]]<br />
|[http://www.openserversummit.com/ OpenStorage Summit]<br />
|October 23, 2013<br />
|Santa Clara, CA<br />
|<br />
|<br />
|-<br />
|[https://www.usenix.org/conference/lisa13/systems-performance Systems Performance]<br />
|Brendan Gregg<br />
|[https://www.usenix.org/conference/lisa13 LISA '13]<br />
|November 2013<br />
|Washington, D.C.<br />
|<br />
|[https://www.usenix.org/conference/lisa13/systems-performance both]<br />
|-<br />
|[https://www.usenix.org/conference/lisa13/zfs-everyone ZFS for Everyone]<br />
|[[User:Gwilson | George Wilson]]<br />
|[https://www.usenix.org/conference/lisa13 LISA '13]<br />
|November 2013<br />
|Washington, D.C.<br />
|<br />
|[https://www.usenix.org/conference/lisa13/zfs-everyone both]<br />
|-<br />
|[https://www.usenix.org/conference/lisa13/zfs-depth ZFS in Depth]<br />
|[[User:Gwilson | George Wilson]]<br />
|[https://www.usenix.org/conference/lisa13 LISA '13]<br />
|November 2013<br />
|Washington, D.C.<br />
|<br />
|<br />
|-<br />
|OpenZFS Office Hours<br />
|[[User:gwilson | George Wilson]]<br />
|[[OpenZFS Office Hours]]<br />
|December 12, 2013<br />
|YouTube, g+ hangout, and IRC<br />
|<br />
|[http://www.youtube.com/watch?v=wWmVW2R_uz8 video]<br />
|}</div>Grahamperrinhttps://openzfs.org/w/index.php?title=Developer_resources&diff=1285Developer resources2013-12-12T18:19:49Z<p>Grahamperrin: Comments about 'ZFS On-Disk Format' pasted from IRC for OpenZFS Office Hours #2.</p>
<hr />
<div>== Ways to contact people ==<br />
* [[Contributors | ZFS experts]]<br />
* [[Mailing list]]<br />
* IRC: [irc://chat.freenode.net/#openzfs #openzfs] on freenode ([http://webchat.freenode.net/?channels=openzfs web interface])<br />
* Twitter: [https://twitter.com/OpenZFS @openzfs]<br />
* [[OpenZFS Office Hours]]: rotating the leader/owner<br />
* Pointers to other mailing lists and repos?<br />
<br />
== Ongoing work ==<br />
* Test framework<br />
* One of our goals is to [[reduce code differences]].<br />
** list of [[platform code differences]]<br />
* [[Projects]]<br />
** [[Projects/ZFS Channel Programs | ZFS Channel Programs]]<br />
<br />
== Implementation documentation ==<br />
* Links to source code are on the [[Distributions]] page<br />
* Architectural/high-level documentation about general OpenZFS concepts<br />
** [[Documentation/ZfsSend|zfs send]]<br />
** [[Documentation/Administrative Commands | administrative commands]] (e.g. <code>zfs snapshot -r pool/fs@snap</code>)<br />
** [[Documentation/ZFS I/O | zfs I/O]]<br />
<br />
=== Materials on other websites ===<br />
<br />
[http://maczfs.googlecode.com/files/ZFSOnDiskFormat.pdf ZFS On-Disk Specification – Draft] (ZFSOnDiskFormat.pdf, Sun Microsystems, Inc., 2006-08) <br />
* sometimes known as the ''ZFS On-Disk Format'' document<br />
* outdated, but "hasn't changed that much, and backwards compatibility dictates that it's still useful as a base of knowledge"; "It's the closest thing we have to a comprehensive overview – and it's still mostly applicable, it just doesn't cover newer stuff … like SAs".<br />
<br />
[http://www.youtube.com/watch?v=BIxVSqUELNc Examining ZFS On-Disk Format Using mdb and zdb] (2008-06-28)<br />
* a forty-three minute video of Max Bruning presenting to the OpenSolaris Developer Conference in Prague.<br />
<br />
The [http://java.net/projects/solaris-zfs/pages/Sourcetour source tour] ([http://web.archive.org/web/20130316073014/http://hub.opensolaris.org/bin/view/Community+Group+zfs/source archive]) describes the various subcomponents in ZFS.<br />
<br />
=== Blog posts on ZFS features ===<br />
<br />
Adaptive Replacement Cache, also known as Adjustable Replacement Cache (ARC)<br />
<br />
* [http://www.c0t0d0s0.org/archives/5329-Some-insight-into-the-read-cache-of-ZFS-or-The-ARC.html Some insight into the read cache of ZFS - or: The ARC - c0t0d0s0.org] (2009-02-20)<br />
* [http://dtrace.org/blogs/brendan/2012/01/09/activity-of-the-zfs-arc/ Brendan's blog » Activity of the ZFS ARC] (2012-01-09)<br />
* [https://pthree.org/2012/12/07/zfs-administration-part-iv-the-adjustable-replacement-cache/ Aaron Toponce : ZFS Administration, Part IV- The Adjustable Replacement Cache] (2012-12-07)<br />
<br />
Block allocation<br />
<br />
* [https://blogs.oracle.com/bonwick/en_US/entry/zfs_block_allocation ZFS Block Allocation (Jeff Bonwick's Blog)] (2006-11-04)<br />
<br />
Deduplication<br />
<br />
* [https://blogs.oracle.com/bonwick/en_US/entry/zfs_dedup ZFS Deduplication (Jeff Bonwick's Blog)] (2009-11-01)<br />
<br />
Encryption<br />
<br />
* [https://blogs.oracle.com/darren/entry/zfs_encryption_what_is_on ZFS encryption what is on disk ? (darren_moffat@blog$ cat /dev/mem | grep /dev/urandom)] (2010-11-19)<br />
<br />
Hot spares<br />
<br />
* [https://blogs.oracle.com/eschrock/entry/zfs_hot_spares ZFS Hot Spares (Eric Schrock's Weblog)] (2006-06-06)<br />
<br />
Level 2 Adaptive Replacement Cache, also known as Level 2 Adjustable Replacement Cache (L2ARC)<br />
<br />
* [https://blogs.oracle.com/brendan/entry/test ZFS L2ARC (Brendan Gregg)] (2008-07-22)<br />
* [https://blogs.oracle.com/brendan/entry/l2arc_screenshots L2ARC Screenshots (Brendan Gregg)] (2009-01-30)<br />
* [http://blog.harschsystems.com/2010/09/08/arcstat-pl-updated-for-l2arc-statistics/ arcstat.pl updated for L2ARC statistics | Mike Harsch's Blog] (2010-09-08)<br />
* [http://mirror-admin.blogspot.com/2011/12/how-l2arc-works.html Days of a mirror admin: How the L2ARC works] (2011-12)<br />
* [https://pthree.org/2012/12/07/zfs-administration-part-iv-the-adjustable-replacement-cache/ Aaron Toponce : ZFS Administration, Part IV- The Adjustable Replacement Cache] (2012-12-07)<br />
<br />
RAID-Z<br />
<br />
* [https://blogs.oracle.com/bonwick/en_US/entry/raid_z RAID-Z (Jeff Bonwick's Blog)] (2005-11-17)<br />
<br />
Scrub and resilver<br />
<br />
* [https://blogs.oracle.com/ahrens/entry/new_scrub_code New Scrub Code (Matthew Ahrens' Weblog)] (2008-12-15)<br />
<br />
Snapshots<br />
<br />
* [https://blogs.oracle.com/ahrens/entry/is_it_magic Is it magic? (Matthew Ahrens' Weblog)] (2005-11-17)<br />
<br />
Space maps<br />
<br />
* [https://blogs.oracle.com/bonwick/entry/space_maps Space Maps (Jeff Bonwick's Blog)] (2007-09-13)<br />
<br />
ZFS Intent Log (ZIL)<br />
<br />
* [https://blogs.oracle.com/perrin/entry/the_lumberjack ZFS: The Lumberjack (Neil Perrin's Weblog)] (2005-11-16)<br />
* [https://pthree.org/2012/12/06/zfs-administration-part-iii-the-zfs-intent-log/ Aaron Toponce : ZFS Administration, Part III- The ZFS Intent Log] (2012-12-06)<br />
<br />
== Repo-specific developer documentation ==<br />
* [[Illumos integration process]]<br />
* Information about how to develop ZFS for the different distributions/pointers to them (e.g., how to build illumos)<br />
** in particular, documentation about how to test and possibly scripts for building<br />
** needs to be written/links provided by reps from those communities.</div>Grahamperrinhttps://openzfs.org/w/index.php?title=File:Pool_performance.pdf&diff=1278File:Pool performance.pdf2013-11-27T22:56:08Z<p>Grahamperrin: Grahamperrin uploaded a new version of &quot;File:Pool performance.pdf&quot;: Pages are now upright.</p>
<hr />
<div>OpenZFS Developer Summit<br />
Pool Performance</div>Grahamperrinhttps://openzfs.org/w/index.php?title=User:Grahamperrin&diff=1273User:Grahamperrin2013-11-24T18:32:06Z<p>Grahamperrin: I now have two Seagate Backup+ Desk drives. A more balanced pool.</p>
<hr />
<div>'''Graham Perrin'''<br />
<br />
Mac user since 1992; administrator of Apple server hardware and software. <br />
<br />
I provide IT support to a broad range of users in research and higher education at multiple locations in Brighton, UK. One day I [http://www.brighton.ac.uk/centrim/graham might give it all up]. <br />
<br />
== ZFS-oriented interests ==<br />
<br />
''Vague awareness'' was transformed to ''interest'' by 2006 articles such as [http://arstechnica.com/staff/2006/08/4995/ Time Machine and the future of the file system | Ars Technica].<br />
<br />
After Apple's ZFS project closed, I remained aware of MacZFS. Whilst MacZFS software became stable, it lacked the feature set and ease of use that I require. <br />
<br />
For Apple: <br />
* I test pre-release builds of [http://www.apple.com/osx/ OS X] and other software titles. <br />
<br />
For [http://web.archive.org/web/20120115040211/http://tenscomplement.com/our-story Ten's Complement]: <br />
* in August 2011 I began beta testing Z-410 Storage<br />
* I continued beta testing after the March 2012 release of ZEVO [http://zevo.getgreenbytes.com/forum/viewtopic.php?t=1900 Silver Edition]. <br />
<br />
I use GreenBytes [http://zevo.getgreenbytes.com ZEVO] [http://zevo.getgreenbytes.com/forum/viewtopic.php?t=93 Community Edition 1.1.1]. <br />
<br />
For the [http://maczfs.org MacZFS] project: <br />
* I occasionally alpha tested OpenZFS ZFS-OSX<br />
** usually on Mavericks, OS X 10.9, in an Oracle VirtualBoxVM. <br />
<br />
In September 2013 I experimented with FreeNAS on a Dell Inspiron 545.<br />
<br />
== Contact ==<br />
<br />
[http://chat.stackexchange.com/rooms/38/ask-different-chat Ask Different Chat]<br />
<br />
* leave a message @grahamperrin<br />
* the [http://apple.stackexchange.com/help/privileges/chat reputation required to talk] is easily gained.<br />
<br />
Instant messaging: <br />
<br />
* xmpp:grahamperrin@jabber.org<br />
<br />
IRC: <br />
<br />
* irc://chat.freenode.net/#macosx and other Apple Mac-related channels<br />
* irc://chat.freenode.net/#openzfs<br />
<br />
Questions about development of MacZFS: <br />
<br />
* [https://groups.google.com/forum/#!forum/maczfs-devel MacZFS-devel]<br />
* http://maczfs.org for general information<br />
* irc://chat.freenode.net/#mac-zfs is no longer used by me. <br />
<br />
Questions about ZEVO: <br />
<br />
* http://zevo.getgreenbytes.com/forum/ is [http://zevo.getgreenbytes.com/forum/viewtopic.php?t=2244 politely read-only]<br />
* beyond Community Edition, I don't expect what's known as ZEVO to be known as such forever so irc://chat.freenode.net/#zevo is no longer used by me. <br />
<br />
E-mail: <br />
<br />
* most incoming mail nestles in a bottomless pit of umpteen thousand items that will remain unread<br />
<br />
… so please prefer Ask Different Chat, instant messaging or IRC.<br />
<br />
== OpenZFS wish list ==<br />
<br />
Uppermost on my list:<br />
<br />
=== Compatible approaches to encryption ===<br />
<br />
The Core Storage approach is functional, and seems reliable, but it's terribly limited compared to ZFS …<br />
* [http://zevo.getgreenbytes.com/forum/viewtopic.php?p=227#p227 a 2012 post by me]<br />
* amongst the OpenZFS projects, I see a preference for [[Projects#Platform_agnostic_encryption_support | compatibility with pool version 30]].<br />
<br />
== Everyday use of ZFS ==<br />
<br />
Apple Mac laptop with Mountain Lion, OS X 10.8.5. <br />
<br />
Apple Core Storage to encrypt: <br />
<br />
* 99 GB of the internal disk for the operating system, apps and so on – HFS Plus<br />
* 616 GB of the disk for my ZFS home directory – the Core Storage logical volume is given to ZEVO. <br />
<br />
Performance of the ZFS pool for my home directory is [http://zevo.getgreenbytes.com/forum/viewtopic.php?t=1540 reduced by the presence of HFS Plus] on the same disk.<br />
<br />
sh-3.2$ diskutil list disk0<br />
/dev/disk0<br />
#: TYPE NAME SIZE IDENTIFIER<br />
0: GUID_partition_scheme *750.2 GB disk0<br />
1: EFI 209.7 MB disk0s1<br />
2: Apple_HFS swap 32.0 GB disk0s2<br />
3: Apple_HFS disk0s3 536.9 MB disk0s3<br />
4: Apple_HFS spare 671.1 MB disk0s4<br />
5: Apple_CoreStorage 99.5 GB disk0s5<br />
6: Apple_Boot Boot OS X 650.0 MB disk0s6<br />
7: Apple_CoreStorage 616.3 GB disk0s7<br />
8: Apple_Boot Boot OS X 134.2 MB disk0s8<br />
<br />
sh-3.2$ sw_vers<br />
ProductName: Mac OS X<br />
ProductVersion: 10.8.5<br />
BuildVersion: 12F45<br />
sh-3.2$ uname -mprsv<br />
Darwin 12.5.0 Darwin Kernel Version 12.5.0: Sun Sep 29 13:33:47 PDT 2013; root:xnu-2050.48.12~1/RELEASE_X86_64 x86_64 i386<br />
<br />
=== Hardware ===<br />
<br />
2009 MacBookPro5,2 <br />
* 8 GB memory<br />
* [http://www.seagate.com/gb/en/internal-hard-drives/laptop-hard-drives/momentus-laptop/ Seagate Momentus®] XT ST750LX003-1AC154 solid state hybrid drive (sshd).<br />
<br />
Sitecom USB 2.0 Dock<br />
* CN-022<br />
* Apple's System Information shows this as product ID 0x0022<br />
* typically in the rearmost port of the MacBookPro5,2.<br />
<br />
2x Seagate Backup+ Desk<br />
* product ID 0xa0a4<br />
* 3 GB <br />
* typically used with the Sitecom. <br />
<br />
The two ''Backup+ Desk'' drives on the Sitecom form a pool that's simply striped – no redundancy of data. But things are backed up. <br />
<br />
Cerulian 10 port USB 2.0 top loading hub<br />
* [http://www.maplin.co.uk/cerulian-10-port-usb-2.0-top-loading-hub-513872 Maplin Electronics code N14JB]<br />
* typically in the rearmost port of the MacBookPro5,2. <br />
<br />
StoreJet Transcend<br />
* TS640GSJ25M2<br />
* similar to the [http://www.transcend-info.com/Products/CatList.asp?LangNo=0&ModNo=293 25M2] range, but a different capacity<br />
* product ID 0x2329<br />
* typically used with the Cerulian hub.<br />
<br />
Seagate GoFlex Desk<br />
* product ID 0x50a5<br />
* 2 GB<br />
* spare, may be used for ZFS-oriented testing.<br />
<br />
== Commitment to open source ==<br />
<br />
Maybe due to my presence as a user in the ZEVO support forum, people sometimes ''imagine'' that I'm more interested in closed source than open source – not so. I use whatever is simplest and most reliable for me … essentials include: <br />
* Mac hardware<br />
* Apple operating systems<br />
* ZEVO Community Edition.<br />
<br />
Beyond the essentials: <br />
* open source Plone for content management<br />
* I prefer open source VirtualBox to closed source VMWare Fusion<br />
… and so on. <br />
<br />
Without Z-410 and ZEVO I would not have made it here. I'm here for OpenZFS.</div>Grahamperrinhttps://openzfs.org/w/index.php?title=Publications&diff=1244Publications2013-11-20T20:59:07Z<p>Grahamperrin: LISA '13 OpenZFS Developer Summit 2013.</p>
<hr />
<div>References to OpenZFS related publications and conference talk recordings.<br />
<br />
== Publications ==<br />
=== BSD ===<br />
{| class="wikitable"<br />
!Title!!Author!!Publication!!Issue!!Page!!Link<br />
|-<br />
|Tuning ZFS on FreeBSD||Martin Matuška||BSD Magazine||issue 08/2012(37)||p. 10-15||[http://bsdmag.org/magazine/1809-tuning-zfs-on-freebsd download]<br />
|-<br />
|ZFS and FreeBSD||Martin Matuška||BSD Magazine||issue 02/2011(19)||p. 10-13||[http://bsdmag.org/magazine/1638-zfs-and-freebsd download]<br />
|}<br />
<br />
== Conference talks ==<br />
Most recent talks are at the bottom.<br />
<br />
=== ZFS Day 2012 ===<br />
[http://zfsday.com/zfsday/ ZFS Day], October 2, 2012, San Francisco, CA<br />
{| class="wikitable"<br />
!Title!!Speaker!!Slides!!Video<br />
|-<br />
|ZFS State of the Union||Matt Ahrens||[http://zfsday.com/wp-content/uploads/2012/08/ZFS-Day-Matt-Ahrens.pdf slides]||[http://zfsday.com/zfsday/zfs-state-of-the-union-matt-ahrens/ video]<br />
|-<br />
|Making the Impossible Possible: Disposable Staging Environments At Scale||Eric Sproul||[http://zfsday.com/wp-content/uploads/2012/08/Disposable_Envs_at_Scale-1.pdf slides]||[http://zfsday.com/zfsday/making-the-impossible-possible-disposable-staging-environments-at-scale/ video]<br />
|-<br />
|Running Without a ZFS Root Pool||Bill Pijewski||[http://zfsday.com/wp-content/uploads/2012/08/zfsday_100212.pdf slides]||[http://zfsday.com/zfsday/running-without-a-zfs-root-pool/ video]<br />
|-<br />
|Productizing ZFS||Justin Gibbs, Will Andrews||||[http://zfsday.com/zfsday/productizing-zfs/ video]<br />
|-<br />
|ZFS for Linux Implementation||Brian Behlendorf||||[http://zfsday.com/zfsday/zfs-for-linux-implementation/ video]<br />
|-<br />
|Panel: The State of ZFS on...||||||[http://zfsday.com/zfsday/panel-the-state-of-zfs-on/ video]<br />
|-<br />
|ZFS Performance Analysis and Tools||Brendan Gregg||[http://www.slideshare.net/brendangregg/zfsperftools2012 slides]||[http://zfsday.com/zfsday/zfs-performance-analysis-and-tools/ video]<br />
|-<br />
|Architecting ZFS Solutions||Richard Elling||||[http://zfsday.com/zfsday/architecting-zfs-solutions/ video]<br />
|-<br />
|Hybrid Storage Pools: Using Disk and Flash with ZFS||Adam Leventhal||||[http://zfsday.com/zfsday/hybrid-storage-pools-using-disk-and-flash-with-zfs/ video]<br />
|-<br />
|ZFS: Darwin's Storage||Jonathan Halstuch||[http://www.racktopsystems.com/wp-content/uploads/2012/10/Darwins-storage-ZFS.pdf slides]||[http://zfsday.com/zfsday/zfs-darwins-storage/ video]<br />
|-<br />
|Y4K?||George Wilson||[http://zfsday.com/wp-content/uploads/2012/08/Why-4k_.pdf slides]||[http://zfsday.com/zfsday/y4k/ video]<br />
|}<br />
<br />
=== OpenZFS Developer Summit 2013 ===<br />
<br />
[[OpenZFS Developer Summit | Summit page]]<br />
<br />
=== Other conferences and events ===<br />
{| class="wikitable"<br />
!Title!!Speaker!!Event!!Date!!Location!!Slides!!Audio<br>/video<br />
|-<br />
|A closer look at the ZFS file system||Paweł Jakub Dawidek||[http://www.bsdcan.org/2008/ BSDCan 2008]||May 16-17, 2008||Ottawa, Canada||[http://www.bsdcan.org/2008/schedule/attachments/58_BSDCan2008-ZFSInternals.pdf slides]||[http://www.youtube.com/watch?v=5-CR3o-Q2CU video]<br />
|-<br />
|The future of ZFS in FreeBSD||Martin Matuška||[http://www.bsdday.eu/2011 BSD Day 2011]||November 5, 2011||Bratislava, Slovakia||[http://people.freebsd.org/~pgj/bsd_day(2011)/materials/02_mm_zfs.pdf slides]||[http://www.youtube.com/watch?v=QSeEtU0-aMQ video]<br />
|-<br />
|Tuning ZFS on FreeBSD||Martin Matuška||[http://2012.eurobsdcon.org EuroBSDCon 2012]||October 20-21, 2012||Warsaw, Poland||[http://blog.vx.sk/uploads/conferences/EuroBSDcon2012/zfs-tuning-handout.pdf slides]||[http://www.youtube.com/watch?v=PIpI7Ub6yjo video]<br />
|-<br />
|bsdtalk227 - ZFS with Matt Ahrens||Matt Ahrens||[http://bsdtalk.blogspot.com/2013/05/bsdtalk227-zfs-with-matt-ahrens.html BSDTalk]||May 17–18, 2013||Ottawa, Canada||||[http://cis01.uma.edu/~wbackman/bsdtalk/bsdtalk227.mp3 audio]<br />
|-<br />
|FreeBSD, Capsicum, GELI and ZFS as key components of a security appliance||Paweł Jakub Dawidek||[http://www.bsdcan.org/2013 BSDCan 2013]||May 17–18, 2013||Ottawa, Canada||||[https://www.youtube.com/watch?v=ErEdIq_nodA video]<br />
|-<br />
|OpenZFS @ BSDCan||Matthew Ahrens||[http://www.bsdcan.org/2013 BSDCan 2013]||May 17–18, 2013||Ottawa, Canada||[http://www.bsdcan.org/2013/schedule/attachments/241_BSDCan2013-ZFS-BOF.pdf slides]||<br />
|-<br />
|[http://linuxconcloudopenna2013.sched.org/event/b50b23f3ed3bd728fa0052b54021a2cc#.UgkeQ2SG2hU OpenZFS on Linux: How the Linux, FreeBSD, and Illumos Communities are Joining Forces to Continue Improving Open-Source ZFS]||Matt Ahrens and Brian Behlendorf||[http://events.linuxfoundation.org/events/linuxcon-north-america LinuxCon North America]||September 17, 2013 ||New Orleans, USA||[http://www.slideshare.net/MatthewAhrens/open-zfs-linuxcon slides]||<br />
|-<br />
|[http://2013.eurobsdcon.org/eurobsdcon-2013/talks/#AhrensMatuska OpenZFS: Upcoming Features and Performance Enhancements with illumos and FreeBSD joining Forces]<br />
| Matt Ahrens,<br>Martin Matuška<br />
|[http://2013.eurobsdcon.org/ EuroBSDCon 2013]<br />
|September 28, 2013 <br />
|Malta<br />
|[[File:OpenZFS-EuroBSDcon.pdf | PDF]], [http://www.slideshare.net/MatthewAhrens/open-zfs-eurobsdcon SlideShare]<br />
|<br />
|-<br />
|[http://www.nosig.org/ARCHIVE/1oct2013/agenda-1oct2013.html The OpenZFS project]<br />
|Matt Ahrens<br />
|[https://blogs.oracle.com/bartm/entry/the_birth_of_nosig_the NOSIG]<br />
|October 1, 2013<br />
|Amsterdam<br />
|<br />
|[http://www.youtube.com/watch?v=QMVnPKhvUlE video]<br />
|-<br />
|Everything OpenZFS<br />
|Matt Ahrens<br />
|[[OpenZFS Office Hours]]<br />
|October 11, 2013<br />
|YouTube + IRC<br />
|<br />
|[http://youtu.be/G2vIdPmsnTI video]<br />
|-<br />
|[http://www.openserversummit.com/English/Conference/Seminar_Session_Descriptions.html#SD104 OpenZFS: the future of open-source ZFS development]<br />
|[[User:Mahrens | Matt Ahrens]], [[User:Gwilson | George Wilson]]<br />
|[http://www.openserversummit.com/ OpenStorage Summit]<br />
|October 23, 2013<br />
|Santa Clara, CA<br />
|<br />
|<br />
|-<br />
|[https://www.usenix.org/conference/lisa13/systems-performance Systems Performance]<br />
|Brendan Gregg<br />
|[https://www.usenix.org/conference/lisa13 LISA '13]<br />
|November 2013<br />
|Washington, D.C.<br />
|<br />
|[https://www.usenix.org/conference/lisa13/systems-performance both]<br />
|-<br />
|[https://www.usenix.org/conference/lisa13/zfs-everyone ZFS for Everyone]<br />
|[[User:Gwilson | George Wilson]]<br />
|[https://www.usenix.org/conference/lisa13 LISA '13]<br />
|November 2013<br />
|Washington, D.C.<br />
|<br />
|[https://www.usenix.org/conference/lisa13/zfs-everyone both]<br />
|-<br />
|[https://www.usenix.org/conference/lisa13/zfs-depth ZFS in Depth]<br />
|[[User:Gwilson | George Wilson]]<br />
|[https://www.usenix.org/conference/lisa13 LISA '13]<br />
|November 2013<br />
|Washington, D.C.<br />
|<br />
|<br />
|}</div>Grahamperrinhttps://openzfs.org/w/index.php?title=OpenZFS_Developer_Summit&diff=1243OpenZFS Developer Summit2013-11-20T20:32:54Z<p>Grahamperrin: Past tense for some of the text. Needs further attention.</p>
<hr />
<div>Hosted by Delphix and originally named ''OpenZFS Day'', the event was renamed ''OpenZFS Developer Summit'' to reflect the target audience of ZFS developers. The goals were:<br />
<br />
* to foster cross-platform community discussions of OpenZFS work<br />
* to make progress on some of the projects proposed for this community.<br />
<br />
[https://www.youtube.com/playlist?list=PLaUVvul17xSdWMBt5tAC8Hu7bbeWskD_q Video recordings of the presentations] are in the OpenZFS channel on YouTube.<br />
<br />
== A huge THANK YOU to our generous sponsors ==<br />
{|cellpadding="10"<br />
|- <br />
|[[File: Delphix logo.png|200x200px|link=http://delphix.com]]<br />
|[[File: Ddrdrive logo dev 2013.png|200x200px|link=http://www.ddrdrive.com]] <br />
|[[File: Logo freebsdfoundation.png|200x200px|link=http://www.freebsd.org]] <br />
|-<br />
|[[FIle: SageCloud-logo-RGB-large-optimized.jpg|200x200px|link=http://sagecloud.com/]] <br />
|[[File: Ixsystems.jpg|200x200px|link=http://www.ixsystems.com/]] <br />
|[[File: CS logo withTagline 150px.png|200x200px|link=http://cloudscaling.com/]] <br />
|-<br />
|[[File: SpectraLogicLogo.jpg|200x200px|link=http://www.spectralogic.com/]] <br />
|[[File: Joyent-logo.png|200x200px|link=http://joyent.com]]<br />
|[[File: New_hac_logo.jpg|200x200px|link=http://www.high-availability.com/]]<br />
|-<br />
|[[File: Nexenta logo.jpg|200x200px|link=http://www.nexenta.com/]]<br />
|}<br />
<br />
== Schedule ==<br />
=== Sunday, November 17th ===<br />
{|border="1" cellpadding="10"<br />
|-<br />
|6:30pm<br />
| Optional dinner at [http://goo.gl/943i5i Rosamunde Sausage Grill] on Mission St.<br />
Location is a 3 minute walk from the 24th Street BART station.<br />
|}<br />
<br />
=== Monday, November 18th ===<br />
{|border="1" cellpadding="10"<br />
|-<br />
|valign="top"|8:30am - 9:00am<br />
| Registration and breakfast<br />
|-<br />
|valign="top"|9:00am - 9:15am<br />
| Introductions<br />
|-<br />
|valign="top"|9:15am - 9:45am<br />
| State of OpenZFS & Event overview (Matt Ahrens)<br />
|-<br />
|valign="top"|9:45am - 10:00am<br />
| List and prioritize discussion topics (lead by Matt Ahrens & Karyn Ritter)<br />
|-<br />
|valign="top"|10:00am - 11:00am<br />
| Discussion sessions<br />
|-<br />
|valign="top"|11:00am - 11:15am<br />
| Coffee & snack break<br />
|-<br />
|valign="top"|11:15am - 12:15pm<br />
| Discussion sessions<br />
|-<br />
|valign="top"|12:15am - 1:00pm<br />
| Lunch<br />
|-<br />
|valign="top"|1:00pm - 1:30pm<br />
| Discussion session: Community Management (lead by Karyn Ritter)<br />
|-<br />
|valign="top"|1:30pm - 3:00pm<br />
| Discussion sessions<br />
|-<br />
|valign="top"|3:00pm - 3:30pm<br />
| Coffee & snack break<br />
|-<br />
|valign="top"|3:30pm - 5:30pm<br />
| Discussion sessions<br />
|-<br />
|valign="top"|5:30pm - 5:45pm<br />
| Closing (Matt Ahrens)<br />
|- <br />
|valign="top"|5:45pm<br />
| Beer bash & casual dinner at Delphix office<br />
|}<br />
<br />
=== Tuesday, November 19th ===<br />
{|border="1" cellpadding="10"<br />
|-<br />
|valign="top"|9:00am - 9:30am<br />
| Breakfast<br />
|-<br />
|valign="top"|9:30am - 10:00am<br />
| Discuss Hackathon ideas & form teams<br />
|-<br />
|valign="top"|10:00am - 12:30pm<br />
|Hackathon<br />
|-<br />
|valign="top"|12:30pm - 1:30pm<br />
|Lunch<br />
|-<br />
|valign="top"|1:30pm - 5:00pm<br />
|Hackathon<br />
|-<br />
|valign="top"|5:00pm - 5:45pm<br />
| Hackathon presentations<br />
|-<br />
|valign="top"|6:00pm<br />
| Optional dinner at [https://www.google.com/maps/preview#!q=Thirsty+Bear+Brewery%2C+Howard+St%2C+San+Francisco%2C+CA&data=!1m4!1m3!1d3309!2d-122.4011122!3d37.7868869!4m15!2m14!1m13!1s0x8085807d0bcfd0df%3A0xdfac6306f9e18402!3m8!1m3!1d13236!2d-122.3926051!3d37.7913156!3m2!1i1261!2i806!4f13.1!4m2!3d37.785502!4d-122.399664 Thirsty Bear]<br />
Location is 5 minute walk from Delphix office.<br />
|}<br />
<br />
Note that the optional, off-site dinners on Sunday and Tuesday are at your own expense.<br />
<br />
== Location ==<br />
The [http://www.delphix.com/company/about-delphix/ Delphix office] in San Francisco:<br />
<br />
[https://www.google.com/maps/preview#!q=604+Mission+St.+Suite+400%2C+San+Francisco%2C+CA+94105&data=!1m4!1m3!1d26473!2d-122.4224157!3d37.7867658!4m12!2m11!1m10!1s0x80858062b5adcc23%3A0xd7584093492239e6!3m8!1m3!1d12612!2d-122.3926051!3d37.7913156!3m2!1i1024!2i768!4f13.1 604 Mission Street, 4th floor, San Francisco, CA 94105]<br />
<br />
Use the keypad to call Delphix and you will be buzzed in. Google maps has pretty good [http://goo.gl/QyUHUj directions]. The easiest way to reach the Delphix SF office is by public transportation. Transportation options, easiest listed first:<br />
* BART to the Montgomery St. Station + 3 minute walk<br />
* Caltrain to the 4th & King station + 25 minutes walk<br />
* Caltrain to the 4th & King station + bus (routes 10, 30, or 45)<br />
* drive + park in a lot (costs about $25/day e.g. 41 Tehama Street, 509 Howard Street, or 55 Hawthorne Street)<br />
<br />
== Discussion topics ==<br />
'''Note: If you are in the room, you are potentially a speaker.''' This will be done in unconference style, so every attendee should come prepared to present or otherwise lead a discussion or session of up to 45 minutes. The most important things to discuss in this setting are:<br />
<br />
# Contentious topics that we need to get widespread agreement on<br />
# Reports of work in progress that need input from others<br />
<br />
==== Proposed topics ====<br />
* OpenZFS code repository (Matt)<br />
** what code changes are needed to make this a success<br />
** process & procedure (code review, testing, committers)<br />
* Performance on full or fragmented pools (George, Ned, Alfred)<br />
** block allocator improvements<br />
* Portable implementation of FMA functionality for Linux & FreeBSD (e.g. for hot spare activation) (Brian)<br />
* OpenZFS community organization (Karyn, Jordan, Matt)<br />
* Storage tiering (Boris)<br />
* How to investigate ZFS performance problems (Adam)<br />
* Test suite (John K)<br />
* ZFS Channel Programs (Chris, Max G, Matt)<br />
* how to examine the ZFS on-disk format with MDB (Max B)<br />
* Interactions with virtual memory subsystem (Brian, Jorgen)<br />
** dealing with swap on zfs<br />
** how the VM system handles large memory allocations<br />
* Scalability on large systems, known bottlenecks (Kirill)<br />
* How to educate new ZFS developers (Max G)<br />
* Disk management - identification, drive spin down/up (John L)<br />
* Resumable send/recv (Boris, Max G, Chris)<br />
<br />
====Topics that were discussed====<br />
* Platform Panel (w/ representatives from illumos, FreeBSD, Linux, and OSX)<br />
* Platform-independent code repository (Matt Ahrens)<br />
* Storage tiering (Boris Protopopov)<br />
* Vendor Panel (all represented companies sharing their work)<br />
* Community planning (Karyn Ritter)<br />
* Channel programs (Chris Siden & Max Grossman)<br />
* Test coverage (John Kennedy)<br />
* Performance investigations (Adam Leventhal)<br />
* Performance on full/fragmented pools (George Wilson)<br />
* Scalability (Kirill Davydychev)<br />
* Virtual memory interactions (Brian Behlendorf)<br />
* Multi tenancy (Rob Mustacchi)<br />
* Examining on-disk format (Max Bruning)<br />
<br />
== Hackathon ==<br />
The goals of the hackathon are:<br />
* to get people working with ZFS engineers from outside their normal circles<br />
* to start work on some of the [[projects]] we'd like to accomplish<br />
Therefore, we should plan to work in small teams of 2-3 engineers. The team members could be pair-programming, splitting up the work into discrete tasks for each person, or advising / implementing.<br />
<br />
=== Hackathon projects ===<br />
These projects were worked on at the hackathon:<br />
<br />
* Testrunner suite running on other platforms: linux, freebsd (+ illumos libzpool)<br />
* channel programs: pass instruction stream into kernel<br />
* ZFS send progress reporting with "set proc title"<br />
* dedicated kmem_cache for dedup table entries<br />
* larger (1MB) blocksize <br />
* compressed ARC<br />
* upstreaming dbuf_user & dbuf state machine (spectra DMU changes)<br />
* limit DDT size<br />
* onexit for osx<br />
<br />
=== Hackathon ideas ===<br />
''Add your idea and your name below. Be prepared to explain your idea at the beginning of the hackathon and enlist/entice others to help with it.''<br />
* Userland ioctls: support for send/recv (fd operations over the wire) [[User:mahrens]]<br />
* larger (1MB) blocksize: shouldn't be too hard if we ignore performance impact [[User:mahrens]]<br />
* dedicated kmem_cache for dedup table entries<br />
* stdin / stdout buffer to improve performance of zfs send and receive<br />
* ZFS mechanism to override devices' reported sector size (512 vs 4k) (alex @ delphix)<br />
* feature flags enhancements for send streams [[User:csiden]]<br />
* set owner of all files within a filesystem with a ZFS property [[User:csiden]]<br />
* dynamic taskqs for ZIO [[User:ahl]]<br />
* towards Oracle Solaris ZFS compatibility [[User:ahl]]<br />
* RAIDzN -- full, arbitrary RAID-7 [[User:ahl]]<br />
* Testrunner suite running on other platforms (John Kennedy)<br />
** or at least identify what is preventing it from running<br />
<br />
== Registration ==<br />
We are expecting everyone will be there to contribute/participate.<br />
<br />
{|border="1" cellpadding="10"<br />
|- <br />
!| Name<br />
!| Affiliation<br />
!| What do you want to talk about?<br />
!| Your experience with ZFS<br />
!| Travel information<br />
!| T-shirt Size<br />
!| Food allergies/preferences? (please list)<br />
|-<br />
| [[User:mahrens | Matt Ahrens]]<br />
| Delphix<br />
| OpenZFS repo: what interfaces should be supported<br />
| Founded ZFS, OpenZFS<br />
| Local to SF<br />
| M<br />
| none<br />
|-<br />
|[[User:sanjeev | Sanjeev Bagewadi]]<br />
| Pluribus Networks<br />
| <br />
| Was part of the RPE team in Sun which fixed ZFS issues faced by customers<br />
| Will be in the Bay Area around that time<br />
| M<br />
| none<br />
|-<br />
|-<br />
| Ned Bass<br />
| LLNL<br />
| Common code base, block allocator improvements<br />
| ZFS on Linux port, Lustre integration<br />
| from East Bay<br />
| XL<br />
| vegetarian preferred<br />
|-<br />
| [[User:behlendorf | Brian Behlendorf]]<br />
| LLNL<br />
| Portable memory management & FMA infrastructure<br />
| ZFS on Linux Maintainer<br />
| Local to east Bay Area<br />
| XL<br />
| none<br />
|-<br />
| Max Bruning<br />
| Joyent<br />
| examining ZFS on-disk format with MDB<br />
| leads ZFS training classes<br />
| ?<br />
| ?<br />
| ?<br />
|-<br />
| Steven Burgess<br />
| Datto Inc.<br />
| openZFS as a customer<br />
| Working as a developer at a company whose product uses ZOL<br />
| from NYC<br />
| M<br />
| none<br />
|-<br />
| [[User:kdavyd | Kirill Davydychev]]<br />
| Nexenta<br />
| Scalability on large systems, major known bottlenecks.<br />
| Debugging, performance analysis/tuning<br />
| Houston<br />
| M<br />
| none<br />
|-<br />
| Justin Gibbs<br />
| Spectra Logic<br />
| Ref-Links, Resilvering Algorithm, Spares, auto-configuration<br />
| DMU performance work<br />
| flying in from CO<br />
| L<br />
| vegetarian<br />
|-<br />
| [[User:Max | Max Grossman]]<br />
| Delphix<br />
| Making it easier to get new ZFS developers up to speed (retrospective on the hole birth feature)<br />
| 3 months so far, still so much to learn...<br />
| Local<br />
| L<br />
| none<br />
|-<br />
| Jordan Hubbard<br />
| iXsystems<br />
| OpenZFS community organization, independent code repo processes<br />
| ?<br />
| Local<br />
| ?<br />
| ?<br />
|-<br />
| Jeremy Jones<br />
| Delphix<br />
| ?<br />
| ZFS bookmarks; debugging techniques<br />
| local<br />
| ?<br />
| ?<br />
|-<br />
| [[User:jkennedy | John Wren Kennedy]]<br />
| Delphix<br />
| Uniform test coverage for OpenZFS<br />
| Supported ZFS in RPE at Sun/Oracle, and test ZFS in QA at Delphix.<br />
| Denver<br />
| L<br />
| none<br />
|-<br />
| [[User:jml | John Layman]]<br />
| SageCloud<br />
| Interested in disk management (spin up/down disks, drive identification, etc.)<br />
| Been working with ZFS on Linux for a few months, contributed small bugfix<br />
| Boston<br />
| XL<br />
| none<br />
|-<br />
| [[User:ahl | Adam Leventhal]]<br />
| Delphix<br />
| ZFS performance investigations?<br />
| RAID-Z2/3, performance work, some small ZFS tasks here and there<br />
| local<br />
| L<br />
| none<br />
|-<br />
| [[User:delphij | Xin Li]]<br />
| iXsystems<br />
| ZFS developer for FreeBSD, TrueNAS and FreeNAS products<br />
| FreeBSD deputy security officer / release engineering team member<br />
| local Bay Area<br />
| L<br />
| none<br />
|-<br />
| [[User:lundman | Jorgen Lundman]]<br />
| GMO Internet<br />
| ZFS, portability<br />
| ZFS on OS X<br />
| Tokyo<br />
| XL<br />
| none<br />
|-<br />
| [[User:maxim | Maxim Martynov]]<br />
| <br />
| <br />
| <br />
| <br />
| M<br />
| none<br />
|-<br />
| Robert Mustacchi<br />
| Joyent<br />
|<br />
| Misc. debugging<br />
| Local to SF<br />
| L<br />
| None<br />
|- <br />
| [[User:tonyn | Tony Nguyen]]<br />
| Nexenta<br />
|<br />
| Misc. debugging, import and I/O performance<br />
| flying in from Denver<br />
| M<br />
| None<br />
|- <br />
| Alfred Perlstein<br />
| iXsystems<br />
| ZFS performance and debugging<br />
| FreeNAS (FreeBSD+ZFS) developer<br />
| ?<br />
| ?<br />
| ?<br />
|- <br />
| Boris Protopopov<br />
| Nexenta<br />
| Resumable send/recv, defrag, storage tiering, spare management, doing fancy things with vdevs<br />
| ZFS dev lead at Nexenta, ZFS extensions for enterprise class features and performance<br />
| Boston<br />
| M<br />
| None<br />
|-<br />
| [[User:awreece | Alex Reece]]<br />
| Delphix<br />
| <br />
| small bug fixes<br />
| local<br />
| M<br />
| No marinera<br />
|-<br />
| [[User:kritter | Karyn Ritter]]<br />
| Delphix<br />
| Community management (discussion)<br />
| <br />
| local<br />
| M<br />
| <br />
|-<br />
| [[User:rodrigc | Craig Rodrigues]]<br />
| iXsystems<br />
| ZFS developer for TrueNAS and FreeNAS products<br />
| FreeBSD release engineering team member<br />
| local<br />
| L<br />
| none<br />
|-<br />
| [[User:csiden | Chris Siden]]<br />
| Delphix<br />
| ZFS Channel Programs, feature flags enhancements for send streams<br />
| Worked on feature flags and async destroy<br />
| local<br />
| L<br />
| none<br />
|-<br />
| Alex Solomatnikov<br />
| <br />
| <br />
| <br />
| <br />
| M<br />
| none<br />
|-<br />
| [[User:pks | Prashanth Sreenivasa ]]<br />
| <br />
| I would like to learn more about ZIL, ZFS I/O scheduler & pipeline and impact of using flash-disks instead of conventional hard-disks.<br />
| Worked on various PDE (product development engineering) groups including Network Storage, Systems & Solaris kernel. Recently I'm working on ZFS based storage appliances, trying to improve zfs performance on illumos/x86 platform and looking forward to contribute to the open source zfs.<br />
| <br />
| M<br />
| <br />
|-<br />
| [[User:prakashsurya | Prakash Surya]]<br />
| LLNL<br />
| <br />
| Misc. work on Linux port. Much to learn, still.<br />
| Local to east Bay Area<br />
| M<br />
| none<br />
<!--<br />
|-<br />
| Ilya Usvyatsky<br />
| Nexenta<br />
| resumable send/recv, defrag<br />
| ?<br />
| ?<br />
| ?<br />
| ?<br />
--><br />
|-<br />
| Rafael Vanoni<br />
| Pluribus<br />
| I'm not a ZFS developer, but would like to work my way towards that.<br />
| I worked on the thread scheduler/dispatcher at Sun/Oracle<br />
| ?<br />
| M<br />
| ?<br />
|-<br />
| [[User:gwilson | George Wilson]]<br />
| Delphix<br />
| performance on full & fragmented pools<br />
| Implemented lots of SPA & VDEV stuff<br />
| flying in from Atlanta ~Monday - Wednesday<br />
| L<br />
| none<br />
|-<br />
| Matt Youds<br />
| High Availability<br />
| <br />
| Experience with ZFS configuration at High-Availability.<br />
| <br />
| L<br />
| Fish<br />
|-<br />
| Sam Zaydel<br />
| ?<br />
| ?<br />
| ?<br />
| ?<br />
| ?<br />
| ?<br />
|}<br />
<br />
== Sponsors ==<br />
The event was fully sponsored! Thank you to our sponsors:<br />
<br />
* Breakfast (2 days) - Sponsored! Thank you [http://www.cloudscaling.com Cloudscaling] and [http://www.ixsystems.com iXsystems]<br />
* Lunch (2 days) - Sponsored! Thank you [http://sagecloud.com Sage Cloud], [http://www.spectralogic.com Spectra Logic] and [http://www.freebsdfoundation.org FreeBSD Foundation]<br />
* Coffee Breaks (2 days) - Sponsored! Thank you [http://www.ixsystems.com iXsystems]<br />
* Beer Bash (day 1) - Sponsored! Thank you [http://www.ddrdrive.com DDRdrive]<br />
* T-Shirts - Sponsored! Thank you [http://www.dexlphix.com Delphix]<br />
* Video Recordings - Thank you [http://www.joyent.com Joyent]<br />
* Cash Donation for expenses - Thank you [http://www.nexenta.com Nexenta] and [http://www.high-availability.com/ High-Availability]<br />
<br />
What do you get for sponsoring:<br />
<br />
* Your name/link on this page!<br />
* Thank you mention during the opening and closing<br />
* Space to put your pop-up banner at the conference venue<br />
* An opportunity to be known as a ZFS supporter in a very talented and influential community.</div>Grahamperrinhttps://openzfs.org/w/index.php?title=User:Grahamperrin&diff=1236User:Grahamperrin2013-11-20T04:24:20Z<p>Grahamperrin: IRC, and questions about ZEVO.</p>
<hr />
<div>'''Graham Perrin'''<br />
<br />
Mac user since 1992; administrator of Apple server hardware and software. <br />
<br />
I provide IT support to a broad range of users in research and higher education at multiple locations in Brighton, UK. One day I [http://www.brighton.ac.uk/centrim/graham might give it all up]. <br />
<br />
== ZFS-oriented interests ==<br />
<br />
''Vague awareness'' was transformed to ''interest'' by 2006 articles such as [http://arstechnica.com/staff/2006/08/4995/ Time Machine and the future of the file system | Ars Technica].<br />
<br />
After Apple's ZFS project closed, I remained aware of MacZFS. Whilst MacZFS software became stable, it lacked the feature set and ease of use that I require. <br />
<br />
For Apple: <br />
* I test pre-release builds of [http://www.apple.com/osx/ OS X] and other software titles. <br />
<br />
For [http://web.archive.org/web/20120115040211/http://tenscomplement.com/our-story Ten's Complement]: <br />
* in August 2011 I began beta testing Z-410 Storage<br />
* I continued beta testing after the March 2012 release of ZEVO [http://zevo.getgreenbytes.com/forum/viewtopic.php?t=1900 Silver Edition]. <br />
<br />
I use GreenBytes [http://zevo.getgreenbytes.com ZEVO] [http://zevo.getgreenbytes.com/forum/viewtopic.php?t=93 Community Edition 1.1.1]. <br />
<br />
For the [http://maczfs.org MacZFS] project: <br />
* I occasionally alpha tested OpenZFS ZFS-OSX<br />
** usually on Mavericks, OS X 10.9, in an Oracle VirtualBoxVM. <br />
<br />
In September 2013 I experimented with FreeNAS on a Dell Inspiron 545.<br />
<br />
== Contact ==<br />
<br />
[http://chat.stackexchange.com/rooms/38/ask-different-chat Ask Different Chat]<br />
<br />
* leave a message @grahamperrin<br />
* the [http://apple.stackexchange.com/help/privileges/chat reputation required to talk] is easily gained.<br />
<br />
Instant messaging: <br />
<br />
* xmpp:grahamperrin@jabber.org<br />
<br />
IRC: <br />
<br />
* irc://chat.freenode.net/#macosx and other Apple Mac-related channels<br />
* irc://chat.freenode.net/#openzfs<br />
<br />
Questions about development of MacZFS: <br />
<br />
* [https://groups.google.com/forum/#!forum/maczfs-devel MacZFS-devel]<br />
* http://maczfs.org for general information<br />
* irc://chat.freenode.net/#mac-zfs is no longer used by me. <br />
<br />
Questions about ZEVO: <br />
<br />
* http://zevo.getgreenbytes.com/forum/ is [http://zevo.getgreenbytes.com/forum/viewtopic.php?t=2244 politely read-only]<br />
* beyond Community Edition, I don't expect what's known as ZEVO to be known as such forever so irc://chat.freenode.net/#zevo is no longer used by me. <br />
<br />
E-mail: <br />
<br />
* most incoming mail nestles in a bottomless pit of umpteen thousand items that will remain unread<br />
<br />
… so please prefer Ask Different Chat, instant messaging or IRC.<br />
<br />
== OpenZFS wish list ==<br />
<br />
Uppermost on my list:<br />
<br />
=== Compatible approaches to encryption ===<br />
<br />
The Core Storage approach is functional, and seems reliable, but it's terribly limited compared to ZFS …<br />
* [http://zevo.getgreenbytes.com/forum/viewtopic.php?p=227#p227 a 2012 post by me]<br />
* amongst the OpenZFS projects, I see a preference for [[Projects#Platform_agnostic_encryption_support | compatibility with pool version 30]].<br />
<br />
== Everyday use of ZFS ==<br />
<br />
Apple Mac laptop with Mountain Lion, OS X 10.8.5. <br />
<br />
Apple Core Storage to encrypt: <br />
<br />
* 99 GB of the internal disk for the operating system, apps and so on – HFS Plus<br />
* 616 GB of the disk for my ZFS home directory – the Core Storage logical volume is given to ZEVO. <br />
<br />
Performance of the ZFS pool for my home directory is [http://zevo.getgreenbytes.com/forum/viewtopic.php?t=1540 reduced by the presence of HFS Plus] on the same disk.<br />
<br />
sh-3.2$ diskutil list disk0<br />
/dev/disk0<br />
#: TYPE NAME SIZE IDENTIFIER<br />
0: GUID_partition_scheme *750.2 GB disk0<br />
1: EFI 209.7 MB disk0s1<br />
2: Apple_HFS swap 32.0 GB disk0s2<br />
3: Apple_HFS disk0s3 536.9 MB disk0s3<br />
4: Apple_HFS spare 671.1 MB disk0s4<br />
5: Apple_CoreStorage 99.5 GB disk0s5<br />
6: Apple_Boot Boot OS X 650.0 MB disk0s6<br />
7: Apple_CoreStorage 616.3 GB disk0s7<br />
8: Apple_Boot Boot OS X 134.2 MB disk0s8<br />
<br />
sh-3.2$ sw_vers<br />
ProductName: Mac OS X<br />
ProductVersion: 10.8.5<br />
BuildVersion: 12F45<br />
sh-3.2$ uname -mprsv<br />
Darwin 12.5.0 Darwin Kernel Version 12.5.0: Sun Sep 29 13:33:47 PDT 2013; root:xnu-2050.48.12~1/RELEASE_X86_64 x86_64 i386<br />
<br />
=== Hardware ===<br />
<br />
2009 MacBookPro5,2 <br />
* 8 GB memory<br />
* [http://www.seagate.com/gb/en/internal-hard-drives/laptop-hard-drives/momentus-laptop/ Seagate Momentus®] XT ST750LX003-1AC154 solid state hybrid drive (sshd).<br />
<br />
Sitecom USB 2.0 Dock<br />
* CN-022<br />
* Apple's System Information shows this as product ID 0x0022<br />
* typically in the rearmost port of the MacBookPro5,2.<br />
<br />
Seagate GoFlex Desk<br />
* product ID 0x50a5<br />
* 2 GB<br />
* typically used with the Sitecom.<br />
<br />
Seagate Backup+ Desk<br />
* product ID 0xa0a4<br />
* 3 GB <br />
* typically used with the Sitecom. <br />
<br />
The two Seagate drives on the Sitecom form a pool that's simply striped – no redundancy of data. But things are backed up. <br />
<br />
Cerulian 10 port USB 2.0 top loading hub<br />
* [http://www.maplin.co.uk/cerulian-10-port-usb-2.0-top-loading-hub-513872 Maplin Electronics code N14JB]<br />
* typically in the rearmost port of the MacBookPro5,2. <br />
<br />
StoreJet Transcend<br />
* TS640GSJ25M2<br />
* similar to the [http://www.transcend-info.com/Products/CatList.asp?LangNo=0&ModNo=293 25M2] range, but a different capacity<br />
* product ID 0x2329<br />
* typically used with the Cerulian hub.<br />
<br />
== Commitment to open source ==<br />
<br />
Maybe due to my presence as a user in the ZEVO support forum, people sometimes ''imagine'' that I'm more interested in closed source than open source – not so. I use whatever is simplest and most reliable for me … essentials include: <br />
* Mac hardware<br />
* Apple operating systems<br />
* ZEVO Community Edition.<br />
<br />
Beyond the essentials: <br />
* open source Plone for content management<br />
* I prefer open source VirtualBox to closed source VMWare Fusion<br />
… and so on. <br />
<br />
Without Z-410 and ZEVO I would not have made it here. I'm here for OpenZFS.</div>Grahamperrinhttps://openzfs.org/w/index.php?title=OpenZFS_Developer_Summit&diff=1165OpenZFS Developer Summit2013-10-27T19:14:06Z<p>Grahamperrin: OS X (not OSX).</p>
<hr />
<div>== OpenZFS Developer Summit 2013 ==<br />
Delphix is hosting a developer-focused event for OpenZFS. The goal of the event is to foster cross-platform community discussions of OpenZFS work, and to make progress on some of the projects proposed for this community.<br />
<br />
''We were previously calling this event "OpenZFS Day", but decided to rename it to reflect its target audience of ZFS developers.''<br />
<br />
The high-level agenda is:<br />
{|border="1" cellpadding="10"<br />
|- <br />
|valign="top"|Monday, Nov 18<br />
|<br />
* Talks<br />
* Breakout sessions<br />
* Hackathon planning<br />
* Beer bash<br />
|-<br />
|Tuesday, Nov 19<br />
|Hackathon (hopefully start work on some of the [[Projects]] the community has suggested)<br />
|}<br />
<br />
=== Location ===<br />
The event will be in the San Francisco Bay Area, most likely in San Francisco. The specific location will depend on how many people plan to attend. The hope is that we can have it at the [http://www.delphix.com/company/about-delphix/ Delphix office] in San Francisco. If it becomes too big, we'll have to reconsider and find a different location.<br />
<br />
=== Speaker Info ===<br />
'''Note: If you are in the room, you are potentially a speaker.''' This will be done in unconference style, so every attendee should come prepared to present or otherwise lead a discussion or session of up to 45 minutes. You can indicate potential topics in the registration table below.<br />
<br />
Equipment available:<br />
* Projector<br />
* Whiteboard<br />
<br />
=== Hackathon ===<br />
The goals of the hackathon are:<br />
* to get people working with ZFS engineers from outside their normal circles<br />
* to start work on some of the [[projects]] we'd like to accomplish<br />
Therefore, we should plan to work in small teams of 2-3 engineers. The team members could be pair-programming, splitting up the work into discrete tasks for each person, or advising / implementing.<br />
<br />
==== Hackathon ideas ====<br />
''Add your idea and your name below. Be prepared to explain your idea at the beginning of the hackathon and enlist/entice others to help with it.''<br />
* Userland ioctls: support for send/recv (fd operations over the wire) [[User:mahrens]]<br />
* larger (1MB) blocksize: shouldn't be too hard if we ignore performance impact [[User:mahrens]]<br />
* dedicated kmem_cache for dedup table entries<br />
* stdin / stdout buffer to improve performance of zfs send and receive<br />
* replace dn_ranges/free_range_t with range_tree_t [[User:mahrens]]<br />
* ZFS mechanism to override devices' reported sector size (512 vs 4k) (alex @ delphix)<br />
* feature flags enhancements for send streams [[User:csiden]]<br />
* set owner of all files within a filesystem with a ZFS property [[User:csiden]]<br />
<br />
=== Registration ===<br />
If you plan to attend the event, please edit this page and add yourself below, or contact [mailto:ann.togasaki@gmail.com ann.togasaki@gmail.com]. If you would like to present and/or have suggestions for what you would like to learn about, please include those details. We are expecting everyone will be there to contribute/participate. (If you need edit permission for this page, email your login name to [mailto:admin@open-zfs.org admin@open-zfs.org])<br />
<br />
'''The sign up deadline is 11:59pm Pacific Time on Sunday, October 27, 2013'''. We need to have a cutoff date so that we can plan for a space that is large enough to accommodate everyone who wants to attend.<br />
<br />
{|border="1" cellpadding="10"<br />
|- <br />
!| Name<br />
!| Affiliation<br />
!| What do you want to talk about?<br />
!| Your experience with ZFS<br />
!| Travel information<br />
!| T-shirt Size<br />
!| Food allergies/preferences? (please list)<br />
|-<br />
| [[User:mahrens | Matt Ahrens]]<br />
| Delphix<br />
| OpenZFS repo: what interfaces should be supported<br />
| Founded ZFS, OpenZFS<br />
| Local to SF<br />
| M<br />
| none<br />
|-<br />
|[[User:sanjeev | Sanjeev Bagewadi]]<br />
| Pluribus Networks<br />
| <br />
| Was part of the RPE team in Sun which fixed ZFS issues faced by customers<br />
| Will be in the Bay Area around that time<br />
| M<br />
| none<br />
|-<br />
| [[User:behlendorf | Brian Behlendorf]]<br />
| LLNL<br />
| Portable memory management & FMA infrastructure<br />
| ZFS on Linux Maintainer<br />
| Local to east Bay Area<br />
| L<br />
| none<br />
|-<br />
| [[User:kdavyd | Kirill Davydychev]]<br />
| Nexenta<br />
| Scalability on large systems, major known bottlenecks.<br />
| Debugging, performance analysis/tuning<br />
| Houston<br />
| M<br />
| none<br />
|-<br />
| [[User:Max | Max Grossman]]<br />
| Delphix<br />
| Making it easier to get new ZFS developers up to speed (retrospective on the hole birth feature)<br />
| 3 months so far, still so much to learn...<br />
| Local<br />
| L<br />
| none<br />
|-<br />
| [[User:jkennedy | John Wren Kennedy]]<br />
| Delphix<br />
| Uniform test coverage for OpenZFS<br />
| Supported ZFS in RPE at Sun/Oracle, and test ZFS in QA at Delphix.<br />
| Denver<br />
| L<br />
| none<br />
|-<br />
| [[User:jml | John Layman]]<br />
| SageCloud<br />
| Interested in disk management (spin up/down disks, drive identification, etc.)<br />
| Been working with ZFS on Linux for a few months, contributed small bugfix<br />
| Boston<br />
| XL<br />
| none<br />
|-<br />
| [[User:ahl | Adam Leventhal]]<br />
| Delphix<br />
| ZFS performance investigations?<br />
| RAID-Z2/3, performance work, some small ZFS tasks here and there<br />
| local<br />
| L<br />
| none<br />
|-<br />
| [[User:lundman | Jorgen Lundman]]<br />
| GMO Internet<br />
| ZFS, portability<br />
| ZFS on OS X<br />
| Tokyo<br />
| XL<br />
| none<br />
|-<br />
| [[User:maxim | Maxim Martynov]]<br />
| <br />
| <br />
| <br />
| <br />
| M<br />
| none<br />
|-<br />
| Robert Mustacchi<br />
| Joyent<br />
|<br />
| Misc. debugging<br />
| Local to SF<br />
| L<br />
| None<br />
|- <br />
| [[User:tonyn | Tony Nguyen]]<br />
| Nexenta<br />
|<br />
| Misc. debugging, import and I/O performance<br />
| flying in from Denver<br />
| M<br />
| None<br />
|- <br />
| Boris Protopopov<br />
| Nexenta<br />
| Resumable send/recv, defrag, storage tiering, spare management<br />
| ZFS dev lead at Nexenta, ZFS extensions for enterprise class features and performance<br />
| Boston<br />
| M<br />
| None<br />
|-<br />
| [[User:awreece | Alex Reece]]<br />
| Delphix<br />
| <br />
| small bug fixes<br />
| local<br />
| M<br />
| No marinera<br />
|-<br />
| [[User:kritter | Karyn Ritter]]<br />
| Delphix<br />
| Community management (discussion)<br />
| <br />
| local<br />
| M<br />
| <br />
|-<br />
| [[User:rodrigc | Craig Rodrigues]]<br />
| iXsystems<br />
| ZFS developer for TrueNAS and FreeNAS products<br />
| FreeBSD release engineering team member<br />
| local<br />
| L<br />
| none<br />
|-<br />
| [[User:csiden | Chris Siden]]<br />
| Delphix<br />
| ZFS Channel Programs, feature flags enhancements for send streams<br />
| Worked on feature flags and async destroy<br />
| local<br />
| L<br />
| none<br />
|-<br />
| Alex Solomatnikov<br />
| <br />
| <br />
| <br />
| <br />
| M<br />
| none<br />
|-<br />
| [[User:pks | Prashanth Sreenivasa ]]<br />
| <br />
| I would like to learn more about ZIL, ZFS I/O scheduler & pipeline and impact of using flash-disks instead of conventional hard-disks.<br />
| Worked on various PDE (product development engineering) groups including Network Storage, Systems & Solaris kernel. Recently I'm working on ZFS based storage appliances, trying to improve zfs performance on illumos/x86 platform and looking forward to contribute to the open source zfs.<br />
| <br />
| <br />
| <br />
|-<br />
| [[User:prakashsurya | Prakash Surya]]<br />
| LLNL<br />
| <br />
| Misc. work on Linux port. Much to learn, still.<br />
| Local to east Bay Area<br />
| M<br />
| none<br />
|-<br />
| Ilya Usvyatsky<br />
| Nexenta<br />
| resumable send/recv, defrag<br />
| ?<br />
| ?<br />
| ?<br />
| ?<br />
<br />
|-<br />
| [[User:gwilson | George Wilson]]<br />
| Delphix<br />
| performance on full & fragmented pools<br />
| Implemented lots of SPA & VDEV stuff<br />
| flying in from Atlanta ~Monday - Thursday (TBD)<br />
| ?<br />
| none<br />
|}<br />
<br />
– ''please keep the table above sorted by last name.''<br />
<br />
=== Sponsors ===<br />
Please contact [mailto:ann.togasaki@gmail.com ann.togasaki@gmail.com] if you'd like to be a sponsor of this event.<br />
<br />
Sponsorship opportunities include:<br />
<br />
* Breakfast (2 days) - Sponsored! Thank you [http://www.cloudscaling.com Cloudscaling] and [http://www.ixsystems.com iXsystems]. <br />
* Lunch (2 days)<br />
* Coffee Breaks (2 days) - Sponsored! Thank you [http://www.ixsystems.com iXsystems]<br />
* Beer Bash (day 1) - Sponsored! Thank you [http://www.ddrdrive.com DDRdrive]<br />
* T-Shirts - Sponsored! Thank you [http://www.dexlphix.com Delphix]<br />
<br />
What do you get for sponsoring:<br />
<br />
* Your name/link on this page!<br />
* Thank you mention during the opening and closing<br />
* Space to put your pop-up banner at the conference venue<br />
* An opportunity to be known as a ZFS supporter in a very talented and influential community.</div>Grahamperrinhttps://openzfs.org/w/index.php?title=User:Grahamperrin&diff=1164User:Grahamperrin2013-10-27T19:10:52Z<p>Grahamperrin: Encouraging posts to MacZFS-devel. 12F45. Other minor edits.</p>
<hr />
<div>'''Graham Perrin'''<br />
<br />
Mac user since 1992; administrator of Apple server hardware and software. <br />
<br />
I provide IT support to a broad range of users in research and higher education at multiple locations in Brighton, UK. One day I [http://www.brighton.ac.uk/centrim/graham might give it all up]. <br />
<br />
== ZFS-oriented interests ==<br />
<br />
''Vague awareness'' was transformed to ''interest'' by 2006 articles such as [http://arstechnica.com/staff/2006/08/4995/ Time Machine and the future of the file system | Ars Technica].<br />
<br />
After Apple's ZFS project closed, I remained aware of MacZFS. Whilst MacZFS software became stable, it lacked the feature set and ease of use that I require. <br />
<br />
For Apple: <br />
* I test pre-release builds of [http://www.apple.com/osx/ OS X] and other software titles. <br />
<br />
For [http://web.archive.org/web/20120115040211/http://tenscomplement.com/our-story Ten's Complement]: <br />
* in August 2011 I began beta testing Z-410 Storage<br />
* I continued beta testing after the March 2012 release of ZEVO [http://zevo.getgreenbytes.com/forum/viewtopic.php?t=1900 Silver Edition]. <br />
<br />
I use GreenBytes [http://zevo.getgreenbytes.com ZEVO] [http://zevo.getgreenbytes.com/forum/viewtopic.php?t=93 Community Edition 1.1.1]. <br />
<br />
For the [http://maczfs.org MacZFS] project: <br />
* I occasionally alpha tested OpenZFS ZFS-OSX<br />
** usually on Mavericks, OS X 10.9, in an Oracle VirtualBoxVM. <br />
<br />
In September 2013 I experimented with FreeNAS on a Dell Inspiron 545.<br />
<br />
== Contact ==<br />
<br />
[http://chat.stackexchange.com/rooms/38/ask-different-chat Ask Different Chat]<br />
<br />
* leave a message @grahamperrin<br />
* the [http://apple.stackexchange.com/help/privileges/chat reputation required to talk] is easily gained.<br />
<br />
Instant messaging: <br />
<br />
* xmpp:grahamperrin@jabber.org<br />
<br />
IRC: <br />
<br />
* irc://chat.freenode.net/#openzfs<br />
* irc://chat.freenode.net/#zevo<br />
<br />
Questions about development of MacZFS: <br />
<br />
* [https://groups.google.com/forum/#!forum/maczfs-devel MacZFS-devel]<br />
* http://maczfs.org for general information.<br />
<br />
Questions about ZEVO: <br />
<br />
* http://zevo.getgreenbytes.com/forum/<br />
<br />
E-mail: <br />
<br />
* most incoming mail nestles in a bottomless pit of umpteen thousand items that will remain unread<br />
<br />
… so please prefer Ask Different Chat, instant messaging or IRC.<br />
<br />
== OpenZFS wish list ==<br />
<br />
Uppermost on my list:<br />
<br />
=== Compatible approaches to encryption ===<br />
<br />
The Core Storage approach is functional, and seems reliable, but it's terribly limited compared to ZFS …<br />
* [http://zevo.getgreenbytes.com/forum/viewtopic.php?p=227#p227 a 2012 post by me]<br />
* amongst the OpenZFS projects, I see a preference for [[Projects#Platform_agnostic_encryption_support | compatibility with pool version 30]].<br />
<br />
== Everyday use of ZFS ==<br />
<br />
Apple Mac laptop with Mountain Lion, OS X 10.8.5. <br />
<br />
Apple Core Storage to encrypt: <br />
<br />
* 99 GB of the internal disk for the operating system, apps and so on – HFS Plus<br />
* 616 GB of the disk for my ZFS home directory – the Core Storage logical volume is given to ZEVO. <br />
<br />
Performance of the ZFS pool for my home directory is [http://zevo.getgreenbytes.com/forum/viewtopic.php?t=1540 reduced by the presence of HFS Plus] on the same disk.<br />
<br />
sh-3.2$ diskutil list disk0<br />
/dev/disk0<br />
#: TYPE NAME SIZE IDENTIFIER<br />
0: GUID_partition_scheme *750.2 GB disk0<br />
1: EFI 209.7 MB disk0s1<br />
2: Apple_HFS swap 32.0 GB disk0s2<br />
3: Apple_HFS disk0s3 536.9 MB disk0s3<br />
4: Apple_HFS spare 671.1 MB disk0s4<br />
5: Apple_CoreStorage 99.5 GB disk0s5<br />
6: Apple_Boot Boot OS X 650.0 MB disk0s6<br />
7: Apple_CoreStorage 616.3 GB disk0s7<br />
8: Apple_Boot Boot OS X 134.2 MB disk0s8<br />
<br />
sh-3.2$ sw_vers<br />
ProductName: Mac OS X<br />
ProductVersion: 10.8.5<br />
BuildVersion: 12F45<br />
sh-3.2$ uname -mprsv<br />
Darwin 12.5.0 Darwin Kernel Version 12.5.0: Sun Sep 29 13:33:47 PDT 2013; root:xnu-2050.48.12~1/RELEASE_X86_64 x86_64 i386<br />
<br />
=== Hardware ===<br />
<br />
2009 MacBookPro5,2 <br />
* 8 GB memory<br />
* [http://www.seagate.com/gb/en/internal-hard-drives/laptop-hard-drives/momentus-laptop/ Seagate Momentus®] XT ST750LX003-1AC154 solid state hybrid drive (sshd).<br />
<br />
Sitecom USB 2.0 Dock<br />
* CN-022<br />
* Apple's System Information shows this as product ID 0x0022<br />
* typically in the rearmost port of the MacBookPro5,2.<br />
<br />
Seagate GoFlex Desk<br />
* product ID 0x50a5<br />
* 2 GB<br />
* typically used with the Sitecom.<br />
<br />
Seagate Backup+ Desk<br />
* product ID 0xa0a4<br />
* 3 GB <br />
* typically used with the Sitecom. <br />
<br />
The two Seagate drives on the Sitecom form a pool that's simply striped – no redundancy of data. But things are backed up. <br />
<br />
Cerulian 10 port USB 2.0 top loading hub<br />
* [http://www.maplin.co.uk/cerulian-10-port-usb-2.0-top-loading-hub-513872 Maplin Electronics code N14JB]<br />
* typically in the rearmost port of the MacBookPro5,2. <br />
<br />
StoreJet Transcend<br />
* TS640GSJ25M2<br />
* similar to the [http://www.transcend-info.com/Products/CatList.asp?LangNo=0&ModNo=293 25M2] range, but a different capacity<br />
* product ID 0x2329<br />
* typically used with the Cerulian hub.<br />
<br />
== Commitment to open source ==<br />
<br />
Maybe due to my presence as a user in the ZEVO support forum, people sometimes ''imagine'' that I'm more interested in closed source than open source – not so. I use whatever is simplest and most reliable for me … essentials include: <br />
* Mac hardware<br />
* Apple operating systems<br />
* ZEVO Community Edition.<br />
<br />
Beyond the essentials: <br />
* open source Plone for content management<br />
* I prefer open source VirtualBox to closed source VMWare Fusion<br />
… and so on. <br />
<br />
Without Z-410 and ZEVO I would not have made it here. I'm here for OpenZFS.</div>Grahamperrinhttps://openzfs.org/w/index.php?title=OpenZFS_Developer_Summit&diff=1159OpenZFS Developer Summit2013-10-25T22:19:52Z<p>Grahamperrin: Alphabetical order.</p>
<hr />
<div>== OpenZFS Developer Summit 2013 ==<br />
Delphix is hosting a developer-focused event for OpenZFS. The goal of the event is to foster cross-platform community discussions of OpenZFS work, and to make progress on some of the projects proposed for this community.<br />
<br />
''We were previously calling this event "OpenZFS Day", but decided to rename it to reflect its target audience of ZFS developers.''<br />
<br />
The high-level agenda is:<br />
{|border="1" cellpadding="10"<br />
|- <br />
|valign="top"|Monday, Nov 18<br />
|<br />
* Talks<br />
* Breakout sessions<br />
* Hackathon planning<br />
* Beer bash<br />
|-<br />
|Tuesday, Nov 19<br />
|Hackathon (hopefully start work on some of the [[Projects]] the community has suggested)<br />
|}<br />
<br />
=== Location ===<br />
The event will be in the San Francisco Bay Area, most likely in San Francisco. The specific location will depend on how many people plan to attend. The hope is that we can have it at the [http://www.delphix.com/company/about-delphix/ Delphix office] in San Francisco. If it becomes too big, we'll have to reconsider and find a different location.<br />
<br />
=== Speaker Info ===<br />
'''Note: If you are in the room, you are potentially a speaker.''' This will be done in unconference style, so every attendee should come prepared to present or otherwise lead a discussion or session of up to 45 minutes. You can indicate potential topics in the registration table below.<br />
<br />
Equipment available:<br />
* Projector<br />
* Whiteboard<br />
<br />
=== Hackathon ===<br />
The goals of the hackathon are:<br />
* to get people working with ZFS engineers from outside their normal circles<br />
* to start work on some of the [[projects]] we'd like to accomplish<br />
Therefore, we should plan to work in small teams of 2-3 engineers. The team members could be pair-programming, splitting up the work into discrete tasks for each person, or advising / implementing.<br />
<br />
==== Hackathon ideas ====<br />
''Add your idea and your name below. Be prepared to explain your idea at the beginning of the hackathon and enlist/entice others to help with it.''<br />
* Userland ioctls: support for send/recv (fd operations over the wire) [[User:mahrens]]<br />
* larger (1MB) blocksize: shouldn't be too hard if we ignore performance impact [[User:mahrens]]<br />
* dedicated kmem_cache for dedup table entries<br />
* stdin / stdout buffer to improve performance of zfs send and receive<br />
* replace dn_ranges/free_range_t with range_tree_t [[User:mahrens]]<br />
* ZFS mechanism to override devices' reported sector size (512 vs 4k) (alex @ delphix)<br />
* feature flags enhancements for send streams [[User:csiden]]<br />
* set owner of all files within a filesystem with a ZFS property [[User:csiden]]<br />
<br />
=== Registration ===<br />
If you plan to attend the event, please edit this page and add yourself below, or contact [mailto:ann.togasaki@gmail.com ann.togasaki@gmail.com]. If you would like to present and/or have suggestions for what you would like to learn about, please include those details. We are expecting everyone will be there to contribute/participate. (If you need edit permission for this page, email your login name to [mailto:admin@open-zfs.org admin@open-zfs.org])<br />
<br />
'''The sign up deadline is 11:59pm Pacific Time on Sunday, October 27, 2013'''. We need to have a cutoff date so that we can plan for a space that is large enough to accommodate everyone who wants to attend.<br />
<br />
{|border="1" cellpadding="10"<br />
|- <br />
!| Name<br />
!| Affiliation<br />
!| What do you want to talk about?<br />
!| Your experience with ZFS<br />
!| Travel information<br />
!| T-shirt Size<br />
!| Food allergies/preferences? (please list)<br />
|-<br />
| [[User:mahrens | Matt Ahrens]]<br />
| Delphix<br />
| OpenZFS repo: what interfaces should be supported<br />
| Founded ZFS, OpenZFS<br />
| Local to SF<br />
| M<br />
| none<br />
|-<br />
|[[User:sanjeev | Sanjeev Bagewadi]]<br />
| Pluribus Networks<br />
| <br />
| Was part of the RPE team in Sun which fixed ZFS issues faced by customers<br />
| Will be in the Bay Area around that time<br />
| M<br />
| none<br />
|-<br />
| [[User:behlendorf | Brian Behlendorf]]<br />
| LLNL<br />
| Portable memory management & FMA infrastructure<br />
| ZFS on Linux Maintainer<br />
| Local to east Bay Area<br />
| L<br />
| none<br />
|-<br />
| [[User:Max | Max Grossman]]<br />
| Delphix<br />
| Making it easier to get new ZFS developers up to speed (retrospective on the hole birth feature)<br />
| 3 months so far, still so much to learn...<br />
| Local<br />
| L<br />
| none<br />
|-<br />
| [[User:jkennedy | John Wren Kennedy]]<br />
| Delphix<br />
| Uniform test coverage for OpenZFS<br />
| Supported ZFS in RPE at Sun/Oracle, and test ZFS in QA at Delphix.<br />
| Denver<br />
| L<br />
| none<br />
|-<br />
| [[User:ahl | Adam Leventhal]]<br />
| Delphix<br />
| ZFS performance investigations?<br />
| RAID-Z2/3, performance work, some small ZFS tasks here and there<br />
| local<br />
| L<br />
| none<br />
|-<br />
| [[User:lundman | Jorgen Lundman]]<br />
| GMO Internet<br />
| ZFS, portability<br />
| ZFS on OSX<br />
| Tokyo<br />
| XL<br />
| none<br />
|-<br />
| [[User:maxim | Maxim Martynov]]<br />
| <br />
| <br />
| <br />
| <br />
| M<br />
| none<br />
|-<br />
| Robert Mustacchi<br />
| Joyent<br />
|<br />
| Misc. debugging<br />
| Local to SF<br />
| L<br />
| None<br />
|- <br />
| [[User:tonyn | Tony Nguyen]]<br />
| Nexenta<br />
|<br />
| Misc. debugging, import and I/O performance<br />
| flying in from Denver<br />
| M<br />
| None<br />
|- <br />
| Boris Protopopov<br />
| Nexenta<br />
| Resumable send/recv, defrag, storage tiering, spare management<br />
| ZFS dev lead at Nexenta, ZFS extensions for enterprise class features and performance<br />
| Boston<br />
| M<br />
| None<br />
|-<br />
| [[User:awreece | Alex Reece]]<br />
| Delphix<br />
| <br />
| small bug fixes<br />
| local<br />
| M<br />
| No marinera<br />
|-<br />
| [[User:kritter | Karyn Ritter]]<br />
| Delphix<br />
| Community management (discussion)<br />
| <br />
| local<br />
| M<br />
| <br />
|-<br />
| [[User:rodrigc | Craig Rodrigues]]<br />
| iXsystems<br />
| ZFS developer for TrueNAS and FreeNAS products<br />
| FreeBSD release engineering team member<br />
| local<br />
| L<br />
| none<br />
|-<br />
| [[User:csiden | Chris Siden]]<br />
| Delphix<br />
| ZFS Channel Programs, feature flags enhancements for send streams<br />
| Worked on feature flags and async destroy<br />
| local<br />
| L<br />
| none<br />
|-<br />
| Alex Solomatnikov<br />
| <br />
| <br />
| <br />
| <br />
| M<br />
| none<br />
|-<br />
| [[User:prakashsurya | Prakash Surya]]<br />
| LLNL<br />
| <br />
| Misc. work on Linux port. Much to learn, still.<br />
| Local to east Bay Area<br />
| M<br />
| none<br />
|-<br />
| Ilya Usvyatsky<br />
| Nexenta<br />
| resumable send/recv, defrag<br />
| ?<br />
| ?<br />
| ?<br />
| ?<br />
<br />
|-<br />
| [[User:gwilson | George Wilson]]<br />
| Delphix<br />
| performance on full & fragmented pools<br />
| Implemented lots of SPA & VDEV stuff<br />
| flying in from Atlanta ~Monday - Thursday (TBD)<br />
| ?<br />
| none<br />
|}<br />
<br />
– ''please keep the table above sorted by last name.''<br />
<br />
=== Sponsors ===<br />
Please contact [mailto:ann.togasaki@gmail.com ann.togasaki@gmail.com] if you'd like to be a sponsor of this event.<br />
<br />
Sponsorship opportunities include:<br />
<br />
* Breakfast (2 days) - Sponsored! Thank you [http://www.cloudscaling.com Cloudscaling] and [http://www.ixsystems.com iXsystems]. <br />
* Lunch (2 days)<br />
* Coffee Breaks (2 days) - Sponsored! Thank you [http://www.ixsystems.com iXsystems]<br />
* Beer Bash (day 1) - Sponsored! Thank you [http://www.ddrdrive.com DDRdrive]<br />
* T-Shirts - Sponsored! Thank you [http://www.dexlphix.com Delphix]<br />
<br />
What do you get for sponsoring:<br />
<br />
* Your name/link on this page!<br />
* Thank you mention during the opening and closing<br />
* Space to put your pop-up banner at the conference venue<br />
* An opportunity to be known as a ZFS supporter in a very talented and influential community.</div>Grahamperrinhttps://openzfs.org/w/index.php?title=Publications&diff=1151Publications2013-10-25T01:48:48Z<p>Grahamperrin: 23 October.</p>
<hr />
<div>References to OpenZFS related publications and conference talk recordings.<br />
<br />
== Publications ==<br />
=== BSD ===<br />
{| class="wikitable"<br />
!Title!!Author!!Publication!!Issue!!Page!!Link<br />
|-<br />
|Tuning ZFS on FreeBSD||Martin Matuška||BSD Magazine||issue 08/2012(37)||p. 10-15||[http://bsdmag.org/magazine/1809-tuning-zfs-on-freebsd download]<br />
|-<br />
|ZFS and FreeBSD||Martin Matuška||BSD Magazine||issue 02/2011(19)||p. 10-13||[http://bsdmag.org/magazine/1638-zfs-and-freebsd download]<br />
|}<br />
<br />
== Conference talks ==<br />
Most recent talks are at the bottom.<br />
<br />
=== ZFS Day 2012 ===<br />
[http://zfsday.com/zfsday/ ZFS Day], October 2, 2012, San Francisco, CA<br />
{| class="wikitable"<br />
!Title!!Speaker!!Slides!!Video<br />
|-<br />
|ZFS State of the Union||Matt Ahrens||[http://zfsday.com/wp-content/uploads/2012/08/ZFS-Day-Matt-Ahrens.pdf slides]||[http://zfsday.com/zfsday/zfs-state-of-the-union-matt-ahrens/ video]<br />
|-<br />
|Making the Impossible Possible: Disposable Staging Environments At Scale||Eric Sproul||[http://zfsday.com/wp-content/uploads/2012/08/Disposable_Envs_at_Scale-1.pdf slides]||[http://zfsday.com/zfsday/making-the-impossible-possible-disposable-staging-environments-at-scale/ video]<br />
|-<br />
|Running Without a ZFS Root Pool||Bill Pijewski||[http://zfsday.com/wp-content/uploads/2012/08/zfsday_100212.pdf slides]||[http://zfsday.com/zfsday/running-without-a-zfs-root-pool/ video]<br />
|-<br />
|Productizing ZFS||Justin Gibbs, Will Andrews||||[http://zfsday.com/zfsday/productizing-zfs/ video]<br />
|-<br />
|ZFS for Linux Implementation||Brian Behlendorf||||[http://zfsday.com/zfsday/zfs-for-linux-implementation/ video]<br />
|-<br />
|Panel: The State of ZFS on...||||||[http://zfsday.com/zfsday/panel-the-state-of-zfs-on/ video]<br />
|-<br />
|ZFS Performance Analysis and Tools||Brendan Gregg||[http://www.slideshare.net/brendangregg/zfsperftools2012 slides]||[http://zfsday.com/zfsday/zfs-performance-analysis-and-tools/ video]<br />
|-<br />
|Architecting ZFS Solutions||Richard Elling||||[http://zfsday.com/zfsday/architecting-zfs-solutions/ video]<br />
|-<br />
|Hybrid Storage Pools: Using Disk and Flash with ZFS||Adam Leventhal||||[http://zfsday.com/zfsday/hybrid-storage-pools-using-disk-and-flash-with-zfs/ video]<br />
|-<br />
|ZFS: Darwin's Storage||Jonathan Halstuch||[http://www.racktopsystems.com/wp-content/uploads/2012/10/Darwins-storage-ZFS.pdf slides]||[http://zfsday.com/zfsday/zfs-darwins-storage/ video]<br />
|-<br />
|Y4K?||George Wilson||[http://zfsday.com/wp-content/uploads/2012/08/Why-4k_.pdf slides]||[http://zfsday.com/zfsday/y4k/ video]<br />
|}<br />
<br />
=== Other conferences and events ===<br />
{| class="wikitable"<br />
!Title!!Speaker!!Event!!Date!!Location!!Slides!!Audio<br>/video<br />
|-<br />
|A closer look at the ZFS file system||Paweł Jakub Dawidek||[http://www.bsdcan.org/2008/ BSDCan 2008]||May 16-17, 2008||Ottawa, Canada||[http://www.bsdcan.org/2008/schedule/attachments/58_BSDCan2008-ZFSInternals.pdf slides]||[http://www.youtube.com/watch?v=5-CR3o-Q2CU video]<br />
|-<br />
|The future of ZFS in FreeBSD||Martin Matuška||[http://www.bsdday.eu/2011 BSD Day 2011]||November 5, 2011||Bratislava, Slovakia||[http://people.freebsd.org/~pgj/bsd_day(2011)/materials/02_mm_zfs.pdf slides]||[http://www.youtube.com/watch?v=QSeEtU0-aMQ video]<br />
|-<br />
|Tuning ZFS on FreeBSD||Martin Matuška||[http://2012.eurobsdcon.org EuroBSDCon 2012]||October 20-21, 2012||Warsaw, Poland||[http://blog.vx.sk/uploads/conferences/EuroBSDcon2012/zfs-tuning-handout.pdf slides]||[http://www.youtube.com/watch?v=PIpI7Ub6yjo video]<br />
|-<br />
|bsdtalk227 - ZFS with Matt Ahrens||Matt Ahrens||[http://bsdtalk.blogspot.com/2013/05/bsdtalk227-zfs-with-matt-ahrens.html BSDTalk]||May 17–18, 2013||Ottawa, Canada||||[http://cis01.uma.edu/~wbackman/bsdtalk/bsdtalk227.mp3 audio]<br />
|-<br />
|FreeBSD, Capsicum, GELI and ZFS as key components of a security appliance||Paweł Jakub Dawidek||[http://www.bsdcan.org/2013 BSDCan 2013]||May 17–18, 2013||Ottawa, Canada||||[https://www.youtube.com/watch?v=ErEdIq_nodA video]<br />
|-<br />
|OpenZFS @ BSDCan||Matthew Ahrens||[http://www.bsdcan.org/2013 BSDCan 2013]||May 17–18, 2013||Ottawa, Canada||[http://www.bsdcan.org/2013/schedule/attachments/241_BSDCan2013-ZFS-BOF.pdf slides]||<br />
|-<br />
|[http://linuxconcloudopenna2013.sched.org/event/b50b23f3ed3bd728fa0052b54021a2cc#.UgkeQ2SG2hU OpenZFS on Linux: How the Linux, FreeBSD, and Illumos Communities are Joining Forces to Continue Improving Open-Source ZFS]||Matt Ahrens and Brian Behlendorf||[http://events.linuxfoundation.org/events/linuxcon-north-america LinuxCon North America]||September 17, 2013 ||New Orleans, USA||[http://www.slideshare.net/MatthewAhrens/open-zfs-linuxcon slides]||<br />
|-<br />
|[http://2013.eurobsdcon.org/eurobsdcon-2013/talks/#AhrensMatuska OpenZFS: Upcoming Features and Performance Enhancements with illumos and FreeBSD joining Forces]<br />
| Matt Ahrens,<br>Martin Matuška<br />
|[http://2013.eurobsdcon.org/ EuroBSDCon 2013]<br />
|September 28, 2013 <br />
|Malta<br />
|[[File:OpenZFS-EuroBSDcon.pdf | PDF]], [http://www.slideshare.net/MatthewAhrens/open-zfs-eurobsdcon SlideShare]<br />
|<br />
|-<br />
|[http://www.nosig.org/ARCHIVE/1oct2013/agenda-1oct2013.html The OpenZFS project]<br />
|Matt Ahrens<br />
|[https://blogs.oracle.com/bartm/entry/the_birth_of_nosig_the NOSIG]<br />
|October 1, 2013<br />
|Amsterdam<br />
|<br />
|[http://www.youtube.com/watch?v=QMVnPKhvUlE video]<br />
|-<br />
|Everything OpenZFS<br />
|Matt Ahrens<br />
|[[OpenZFS Office Hours]]<br />
|October 11, 2013<br />
|YouTube + IRC<br />
|<br />
|[http://youtu.be/G2vIdPmsnTI video]<br />
|-<br />
|[http://www.openserversummit.com/English/Conference/Seminar_Session_Descriptions.html#SD104 OpenZFS: the future of open-source ZFS development]<br />
|[[User:Mahrens | Matt Ahrens]], [[User:Gwilson | George Wilson]]<br />
|[http://www.openserversummit.com/ OpenStorage Summit]<br />
|October 23, 2013<br />
|Santa Clara, CA<br />
|<br />
|<br />
|}</div>Grahamperrinhttps://openzfs.org/w/index.php?title=OpenZFS_Developer_Summit&diff=1150OpenZFS Developer Summit2013-10-25T01:42:33Z<p>Grahamperrin: Alphabetical order.</p>
<hr />
<div>== OpenZFS Developer Summit 2013 ==<br />
Delphix is hosting a developer-focused event for OpenZFS. The goal of the event is to foster cross-platform community discussions of OpenZFS work, and to make progress on some of the projects proposed for this community.<br />
<br />
''We were previously calling this event "OpenZFS Day", but decided to rename it to reflect its target audience of ZFS developers.''<br />
<br />
The high-level agenda is:<br />
{|border="1" cellpadding="10"<br />
|- <br />
|valign="top"|Monday, Nov 18<br />
|<br />
* Talks<br />
* Breakout sessions<br />
* Hackathon planning<br />
* Beer bash<br />
|-<br />
|Tuesday, Nov 19<br />
|Hackathon (hopefully start work on some of the [[Projects]] the community has suggested)<br />
|}<br />
<br />
=== Location ===<br />
The event will be in the San Francisco Bay Area, most likely in San Francisco. The specific location will depend on how many people plan to attend. The hope is that we can have it at the [http://www.delphix.com/company/about-delphix/ Delphix office] in San Francisco. If it becomes too big, we'll have to reconsider and find a different location.<br />
<br />
=== Speaker Info ===<br />
'''Note: If you are in the room, you are potentially a speaker.''' This will be done in unconference style, so every attendee should come prepared to present or otherwise lead a discussion or session of up to 45 minutes. You can indicate potential topics in the registration table below.<br />
<br />
Equipment available:<br />
* Projector<br />
* Whiteboard<br />
<br />
=== Hackathon ===<br />
The goals of the hackathon are:<br />
* to get people working with ZFS engineers from outside their normal circles<br />
* to start work on some of the [[projects]] we'd like to accomplish<br />
Therefore, we should plan to work in small teams of 2-3 engineers. The team members could be pair-programming, splitting up the work into discrete tasks for each person, or advising / implementing.<br />
<br />
==== Hackathon ideas ====<br />
''Add your idea and your name below. Be prepared to explain your idea at the beginning of the hackathon and enlist/entice others to help with it.''<br />
* Userland ioctls: support for send/recv (fd operations over the wire) [[User:mahrens]]<br />
* larger (1MB) blocksize: shouldn't be too hard if we ignore performance impact [[User:mahrens]]<br />
* dedicated kmem_cache for dedup table entries<br />
* stdin / stdout buffer to improve performance of zfs send and receive<br />
* replace dn_ranges/free_range_t with range_tree_t [[User:mahrens]]<br />
* ZFS mechanism to override devices' reported sector size (512 vs 4k) (alex @ delphix)<br />
* feature flags enhancements for send streams [[User:csiden]]<br />
* set owner of all files within a filesystem with a ZFS property [[User:csiden]]<br />
<br />
=== Registration ===<br />
If you plan to attend the event, please edit this page and add yourself below, or contact [mailto:ann.togasaki@gmail.com ann.togasaki@gmail.com]. If you would like to present and/or have suggestions for what you would like to learn about, please include those details. We are expecting everyone will be there to contribute/participate. (If you need edit permission for this page, email your login name to [mailto:admin@open-zfs.org admin@open-zfs.org])<br />
<br />
'''The sign up deadline is 11:59pm Pacific Time on Sunday, October 27, 2013'''. We need to have a cutoff date so that we can plan for a space that is large enough to accommodate everyone who wants to attend.<br />
<br />
{|border="1" cellpadding="10"<br />
|- <br />
!| Name<br />
!| Affiliation<br />
!| What do you want to talk about?<br />
!| Your experience with ZFS<br />
!| Travel information<br />
!| T-shirt Size<br />
!| Food allergies/preferences? (please list)<br />
|-<br />
| [[User:mahrens | Matt Ahrens]]<br />
| Delphix<br />
| OpenZFS repo: what interfaces should be supported<br />
| Founded ZFS, OpenZFS<br />
| Local to SF<br />
| M<br />
| none<br />
|-<br />
|[[User:sanjeev | Sanjeev Bagewadi]]<br />
| Pluribus Networks<br />
| <br />
| Was part of the RPE team in Sun which fixed ZFS issues faced by customers<br />
| Will be in the Bay Area around that time<br />
| M<br />
| none<br />
|-<br />
| [[User:behlendorf | Brian Behlendorf]]<br />
| LLNL<br />
| Portable memory management & FMA infrastructure<br />
| ZFS on Linux Maintainer<br />
| Local to east Bay Area<br />
| L<br />
| none<br />
|-<br />
| [[User:Max | Max Grossman]]<br />
| Delphix<br />
| Making it easier to get new ZFS developers up to speed (retrospective on the hole birth feature)<br />
| 3 months so far, still so much to learn...<br />
| Local<br />
| L<br />
| none<br />
|-<br />
| [[User:jkennedy | John Wren Kennedy]]<br />
| Delphix<br />
| Uniform test coverage for OpenZFS<br />
| Supported ZFS in RPE at Sun/Oracle, and test ZFS in QA at Delphix.<br />
| Denver<br />
| L<br />
| none<br />
|-<br />
| [[User:ahl | Adam Leventhal]]<br />
| Delphix<br />
| ZFS performance investigations?<br />
| RAID-Z2/3, performance work, some small ZFS tasks here and there<br />
| local<br />
| L<br />
| none<br />
|-<br />
| [[User:lundman | Jorgen Lundman]]<br />
| GMO Internet<br />
| ZFS, portability<br />
| ZFS on OSX<br />
| Tokyo<br />
| XL<br />
| none<br />
|-<br />
| [[User:maxim | Maxim Martynov]]<br />
| <br />
| <br />
| <br />
| <br />
| M<br />
| none<br />
|-<br />
| Robert Mustacchi<br />
| Joyent<br />
|<br />
| Misc. debugging<br />
| Local to SF<br />
| L<br />
| None<br />
|- <br />
| [[User:awreece | Alex Reece]]<br />
| Delphix<br />
| <br />
| small bug fixes<br />
| local<br />
| M<br />
| No marinera<br />
|-<br />
| [[User:kritter | Karyn Ritter]]<br />
| Delphix<br />
| Community management (discussion)<br />
| <br />
| local<br />
| M<br />
| <br />
|-<br />
| [[User:csiden | Chris Siden]]<br />
| Delphix<br />
| ZFS Channel Programs, feature flags enhancements for send streams<br />
| Worked on feature flags and async destroy<br />
| local<br />
| L<br />
| none<br />
|-<br />
| Alex Solomatnikov<br />
| <br />
| <br />
| <br />
| <br />
| M<br />
| none<br />
|-<br />
| [[User:prakashsurya | Prakash Surya]]<br />
| LLNL<br />
| <br />
| Misc. work on Linux port. Much to learn, still.<br />
| Local to east Bay Area<br />
| M<br />
| none<br />
|-<br />
| [[User:gwilson | George Wilson]]<br />
| Delphix<br />
| performance on full & fragmented pools<br />
| Implemented lots of SPA & VDEV stuff<br />
| flying in from Atlanta ~Monday - Thursday (TBD)<br />
| ?<br />
| none<br />
|}<br />
<br />
– ''please keep the table above sorted by last name.''<br />
<br />
=== Sponsors ===<br />
Please contact [mailto:ann.togasaki@gmail.com ann.togasaki@gmail.com] if you'd like to be a sponsor of this event.<br />
<br />
Sponsorship opportunities include:<br />
<br />
* Breakfast (2 days) - Sponsored! Thank you [http://www.cathey.co Cathey Communications] and [http://www.ixsystems.com iXsystems]. <br />
* Lunch (2 days)<br />
* Coffee Breaks (2 days) - Sponsored! Thank you [http://www.ixsystems.com iXsystems]<br />
* Beer Bash (day 1) - Sponsored! Thank you [http://www.ddrdrive.com DDRdrive]<br />
* T-Shirts - Sponsored! Thank you [http://www.dexlphix.com Delphix]<br />
<br />
What do you get for sponsoring:<br />
<br />
* Your name/link on this page!<br />
* Thank you mention during the opening and closing<br />
* Space to put your pop-up banner at the conference venue<br />
* An opportunity to be known as a ZFS supporter in a very talented and influential community.</div>Grahamperrinhttps://openzfs.org/w/index.php?title=OpenZFSOnOSX&diff=1133OpenZFSOnOSX2013-10-23T06:21:29Z<p>Grahamperrin: Link to discussion of restarting the Mac following an uninstallation of ZEVO.</p>
<hr />
<div>== MacZFS ==<br />
<br />
{|cellpadding="20" <br />
| [[file:MacZFS-logo.png | link=http://maczfs.org]]<br />
| http://maczfs.org<br />
The April 2013 release of MacZFS is stable, but lacks the feature set that's associated with OpenZFS …<br />
|}<br />
<br />
== ZFS-OSX ==<br />
<br />
'''ZFS-OSX brings OpenZFS features to MacZFS'''. <br />
<br />
[https://github.com/zfs-osx ZFS-OSX] is a well-developed alpha that is ready for testing by people who are happy to use Terminal. It's designed for use with Mac OS X 10.6 – OS X 10.9 (Snow Leopard, Lion, Mountain Lion and Mavericks).<br />
<br />
=== To begin testing the most recent build ===<br />
<br />
[http://zerobsd.tumblr.com/post/62586498252/os-x-with-zfs ZeroBSD | OS X with ZFS] offers an approach to obtaining the most recent code, building from that code and installing the built software. <br />
<br />
=== To test without building ===<br />
<br />
Disk images are ocasionally added to http://lundman.net/ftp/osx.zfs/ – aim for the most recent .dmg file. The image will contain built software – binaries, kernel extensions (KEXTs) and so on – that may be used with or without installation. <br />
<br />
These images are not designed to include the most recent fixes or enhancements. If in doubt, please ask in IRC: <br />
<br />
* irc://chat.freenode.net/#mac-zfs<br />
<br />
=== The simplest approach ===<br />
<br />
Expect a user-friendly package – for use with Apple's Installer.app – before the end of 2013. <br />
<br />
=== Suggested focus areas for testers ===<br />
<br />
A ZFS file system for your home directory<br />
* where ~ is the root of that file system. <br />
<br />
A ZFS file system containing multiple home directories. <br />
<br />
=== Notes ===<br />
<br />
ZFS-OSX is [https://github.com/zfs-osx/zfs/issues?direction=asc&sort=created&state=open not yet feature-complete]. <br />
<br />
Alpha software should not be used with data that is of significant value. Be thorough with your backups and please remember that ZFS alone is not a substitute for a good backup strategy.<br />
<br />
If you're limited to Leopard, or if you require the most stable MacZFS at this time, then instead of ZFS-OSX: consider relatively old version 74.3 of MacZFS.<br />
<br />
If you normally use MacZFS 74.3 or ZEVO: <br />
<br />
* you must uninstall that software before testing ZFS-OSX<br />
* you must uninstall ZFS-OSX before reverting to ZEVO or MacZFS 74.3<br />
<br />
– and [http://zevo.getgreenbytes.com/forum/viewtopic.php?p=5441#p5441 a restart of the Mac may be recommended].</div>Grahamperrinhttps://openzfs.org/w/index.php?title=OpenZFSOnOSX&diff=1132OpenZFSOnOSX2013-10-23T01:16:43Z<p>Grahamperrin: http://zevo.getgreenbytes.com/forum/viewtopic.php?p=5438#p5438</p>
<hr />
<div>== MacZFS ==<br />
<br />
{|cellpadding="20" <br />
| [[file:MacZFS-logo.png | link=http://maczfs.org]]<br />
| http://maczfs.org<br />
The April 2013 release of MacZFS is stable, but lacks the feature set that's associated with OpenZFS …<br />
|}<br />
<br />
== ZFS-OSX ==<br />
<br />
'''ZFS-OSX brings OpenZFS features to MacZFS'''. <br />
<br />
[https://github.com/zfs-osx ZFS-OSX] is a well-developed alpha that is ready for testing by people who are happy to use Terminal. It's designed for use with Mac OS X 10.6 – OS X 10.9 (Snow Leopard, Lion, Mountain Lion and Mavericks).<br />
<br />
=== To begin testing the most recent build ===<br />
<br />
[http://zerobsd.tumblr.com/post/62586498252/os-x-with-zfs ZeroBSD | OS X with ZFS] offers an approach to obtaining the most recent code, building from that code and installing the built software. <br />
<br />
=== To test without building ===<br />
<br />
Disk images are ocasionally added to http://lundman.net/ftp/osx.zfs/ – aim for the most recent .dmg file. The image will contain built software – binaries, kernel extensions (KEXTs) and so on – that may be used with or without installation. <br />
<br />
These images are not designed to include the most recent fixes or enhancements. If in doubt, please ask in IRC: <br />
<br />
* irc://chat.freenode.net/#mac-zfs<br />
<br />
=== The simplest approach ===<br />
<br />
Expect a user-friendly package – for use with Apple's Installer.app – before the end of 2013. <br />
<br />
=== Suggested focus areas for testers ===<br />
<br />
A ZFS file system for your home directory<br />
* where ~ is the root of that file system. <br />
<br />
A ZFS file system containing multiple home directories. <br />
<br />
=== Notes ===<br />
<br />
ZFS-OSX is [https://github.com/zfs-osx/zfs/issues?direction=asc&sort=created&state=open not yet feature-complete]. <br />
<br />
Alpha software should not be used with data that is of significant value. Be thorough with your backups and please remember that ZFS alone is not a substitute for a good backup strategy.<br />
<br />
If you're limited to Leopard, or if you require the most stable MacZFS at this time, then instead of ZFS-OSX: consider relatively old version 74.3 of MacZFS.<br />
<br />
If you normally use MacZFS 74.3 or ZEVO: <br />
<br />
* you must uninstall that software before testing ZFS-OSX; <br />
* you must uninstall ZFS-OSX before reverting to ZEVO or MacZFS 74.3<br />
<br />
– and in either case, a restart of the Mac may be recommended.</div>Grahamperrinhttps://openzfs.org/w/index.php?title=Publications&diff=1119Publications2013-10-16T00:49:05Z<p>Grahamperrin: Everything OpenZFS (… was the title given before the event, AFAIR)</p>
<hr />
<div>References to OpenZFS related publications and conference talk recordings.<br />
<br />
== Publications ==<br />
=== BSD ===<br />
{| class="wikitable"<br />
!Title!!Author!!Publication!!Issue!!Page!!Link<br />
|-<br />
|Tuning ZFS on FreeBSD||Martin Matuška||BSD Magazine||issue 08/2012(37)||p. 10-15||[http://bsdmag.org/magazine/1809-tuning-zfs-on-freebsd download]<br />
|-<br />
|ZFS and FreeBSD||Martin Matuška||BSD Magazine||issue 02/2011(19)||p. 10-13||[http://bsdmag.org/magazine/1638-zfs-and-freebsd download]<br />
|}<br />
<br />
== Conference talks ==<br />
Most recent talks are at the bottom.<br />
<br />
=== ZFS Day 2012 ===<br />
[http://zfsday.com/zfsday/ ZFS Day], October 2, 2012, San Francisco, CA<br />
{| class="wikitable"<br />
!Title!!Speaker!!Slides!!Video<br />
|-<br />
|ZFS State of the Union||Matt Ahrens||[http://zfsday.com/wp-content/uploads/2012/08/ZFS-Day-Matt-Ahrens.pdf slides]||[http://zfsday.com/zfsday/zfs-state-of-the-union-matt-ahrens/ video]<br />
|-<br />
|Making the Impossible Possible: Disposable Staging Environments At Scale||Eric Sproul||[http://zfsday.com/wp-content/uploads/2012/08/Disposable_Envs_at_Scale-1.pdf slides]||[http://zfsday.com/zfsday/making-the-impossible-possible-disposable-staging-environments-at-scale/ video]<br />
|-<br />
|Running Without a ZFS Root Pool||Bill Pijewski||[http://zfsday.com/wp-content/uploads/2012/08/zfsday_100212.pdf slides]||[http://zfsday.com/zfsday/running-without-a-zfs-root-pool/ video]<br />
|-<br />
|Productizing ZFS||Justin Gibbs, Will Andrews||||[http://zfsday.com/zfsday/productizing-zfs/ video]<br />
|-<br />
|ZFS for Linux Implementation||Brian Behlendorf||||[http://zfsday.com/zfsday/zfs-for-linux-implementation/ video]<br />
|-<br />
|Panel: The State of ZFS on...||||||[http://zfsday.com/zfsday/panel-the-state-of-zfs-on/ video]<br />
|-<br />
|ZFS Performance Analysis and Tools||Brendan Gregg||[http://www.slideshare.net/brendangregg/zfsperftools2012 slides]||[http://zfsday.com/zfsday/zfs-performance-analysis-and-tools/ video]<br />
|-<br />
|Architecting ZFS Solutions||Richard Elling||||[http://zfsday.com/zfsday/architecting-zfs-solutions/ video]<br />
|-<br />
|Hybrid Storage Pools: Using Disk and Flash with ZFS||Adam Leventhal||||[http://zfsday.com/zfsday/hybrid-storage-pools-using-disk-and-flash-with-zfs/ video]<br />
|-<br />
|ZFS: Darwin's Storage||Jonathan Halstuch||[http://www.racktopsystems.com/wp-content/uploads/2012/10/Darwins-storage-ZFS.pdf slides]||[http://zfsday.com/zfsday/zfs-darwins-storage/ video]<br />
|-<br />
|Y4K?||George Wilson||[http://zfsday.com/wp-content/uploads/2012/08/Why-4k_.pdf slides]||[http://zfsday.com/zfsday/y4k/ video]<br />
|}<br />
<br />
=== Other conferences and events ===<br />
{| class="wikitable"<br />
!Title!!Speaker!!Event!!Date!!Location!!Slides!!Audio<br>/video<br />
|-<br />
|A closer look at the ZFS file system||Paweł Jakub Dawidek||[http://www.bsdcan.org/2008/ BSDCan 2008]||May 16-17, 2008||Ottawa, Canada||[http://www.bsdcan.org/2008/schedule/attachments/58_BSDCan2008-ZFSInternals.pdf slides]||[http://www.youtube.com/watch?v=5-CR3o-Q2CU video]<br />
|-<br />
|The future of ZFS in FreeBSD||Martin Matuška||[http://www.bsdday.eu/2011 BSD Day 2011]||November 5, 2011||Bratislava, Slovakia||[http://people.freebsd.org/~pgj/bsd_day(2011)/materials/02_mm_zfs.pdf slides]||[http://www.youtube.com/watch?v=QSeEtU0-aMQ video]<br />
|-<br />
|Tuning ZFS on FreeBSD||Martin Matuška||[http://2012.eurobsdcon.org EuroBSDCon 2012]||October 20-21, 2012||Warsaw, Poland||[http://blog.vx.sk/uploads/conferences/EuroBSDcon2012/zfs-tuning-handout.pdf slides]||[http://www.youtube.com/watch?v=PIpI7Ub6yjo video]<br />
|-<br />
|bsdtalk227 - ZFS with Matt Ahrens||Matt Ahrens||[http://bsdtalk.blogspot.com/2013/05/bsdtalk227-zfs-with-matt-ahrens.html BSDTalk]||May 17–18, 2013||Ottawa, Canada||||[http://cis01.uma.edu/~wbackman/bsdtalk/bsdtalk227.mp3 audio]<br />
|-<br />
|FreeBSD, Capsicum, GELI and ZFS as key components of a security appliance||Paweł Jakub Dawidek||[http://www.bsdcan.org/2013 BSDCan 2013]||May 17–18, 2013||Ottawa, Canada||||[https://www.youtube.com/watch?v=ErEdIq_nodA video]<br />
|-<br />
|OpenZFS @ BSDCan||Matthew Ahrens||[http://www.bsdcan.org/2013 BSDCan 2013]||May 17–18, 2013||Ottawa, Canada||[http://www.bsdcan.org/2013/schedule/attachments/241_BSDCan2013-ZFS-BOF.pdf slides]||<br />
|-<br />
|[http://linuxconcloudopenna2013.sched.org/event/b50b23f3ed3bd728fa0052b54021a2cc#.UgkeQ2SG2hU OpenZFS on Linux: How the Linux, FreeBSD, and Illumos Communities are Joining Forces to Continue Improving Open-Source ZFS]||Matt Ahrens and Brian Behlendorf||[http://events.linuxfoundation.org/events/linuxcon-north-america LinuxCon North America]||September 17, 2013 ||New Orleans, USA||[http://www.slideshare.net/MatthewAhrens/open-zfs-linuxcon slides]||<br />
|-<br />
|[http://2013.eurobsdcon.org/eurobsdcon-2013/talks/#AhrensMatuska OpenZFS: Upcoming Features and Performance Enhancements with illumos and FreeBSD joining Forces]<br />
| Matt Ahrens,<br>Martin Matuška<br />
|[http://2013.eurobsdcon.org/ EuroBSDCon 2013]<br />
|September 28, 2013 <br />
|Malta<br />
|[[File:OpenZFS-EuroBSDcon.pdf | PDF]], [http://www.slideshare.net/MatthewAhrens/open-zfs-eurobsdcon SlideShare]<br />
|<br />
|-<br />
|[http://www.nosig.org/ARCHIVE/1oct2013/agenda-1oct2013.html The OpenZFS project]<br />
|Matt Ahrens<br />
|[https://blogs.oracle.com/bartm/entry/the_birth_of_nosig_the NOSIG]<br />
|October 1, 2013<br />
|Amsterdam<br />
|<br />
|[http://www.youtube.com/watch?v=QMVnPKhvUlE video]<br />
|-<br />
|Everything OpenZFS<br />
|Matt Ahrens<br />
|[[OpenZFS Office Hours]]<br />
|October 11, 2013<br />
|YouTube + IRC<br />
|<br />
|[http://youtu.be/G2vIdPmsnTI video]<br />
|}</div>Grahamperrinhttps://openzfs.org/w/index.php?title=OpenZFS_Office_Hours&diff=1118OpenZFS Office Hours2013-10-16T00:45:42Z<p>Grahamperrin: 11th October is past. Sentence case heading, for consistency with most headings elsewhere.</p>
<hr />
<div>An opportunity to chat live with a ZFS expert (usually a developer) about their work. Depending on who shows up, it could be an interview, a lecture on ZFS internals, or a discussion of how to get the best performance from ZFS in a particular situation.<br />
<br />
== Most recent event ==<br />
<br />
Office Hours with Matt Ahrens was held on 11th October. You can view the recording by clicking [http://youtu.be/G2vIdPmsnTI here], or in the embedded viewer below.<br />
<br />
<html><br />
<iframe width="420" height="315" src="http://www.youtube.com/embed/G2vIdPmsnTI" frameborder="0" allowfullscreen></iframe><br />
</html><br />
<br />
== Future Events ==<br />
<br />
Future events will be hosted by [[User:Behlendorf | Brian Behlendorf]], [[User:Gwilson | George Wilson]], Andriy Gapon (FreeBSD®/ZFS kernel dev at HybridCluster) and [[User:Ryao | Richard Yao]].<br />
<br />
== Event listing ==<br />
<br />
{| class="wikitable"<br />
!Topic<br />
!Speakers<br />
!Date and time<br />
!Venue<br />
|-<br />
|Everything OpenZFS<br />
|[[User:mahrens | Matt Ahrens]]<br />
|9AM-10AM PDT ([http://www.timeanddate.com/worldclock/converted.html?iso=20131011T09&p1=137&p2=0 16:00 UTC]), October 11, 2013<br />
| [http://youtu.be/G2vIdPmsnTI video recording]<br />
|}<br />
<br />
== Technology ==<br />
<br />
You can participate in the Office Hours using the following technologies. This webpage will be updated with the specific Hangout and YouTube URLs 15 minutes before the session starts.<br />
* Google+ [https://www.google.com/+/learnmore/hangouts/onair.html Hangout]<br />
** Requires google+ account<br />
** Requires browser [https://www.google.com/tools/dlpage/hangoutplugin plug-in] (works on Mac, Windows, and Linux), or iOS or Android app<br />
** This is the preferred option; latency will be lowest and you can interact via voice, video, and text<br />
* YouTube<br />
** View the conversation live via YouTube; works even on FreeBSD and Solaris<br />
** Ask questions via IRC<br />
** 30 second delay<br />
* IRC<br />
** Ask questions on [irc://chat.freenode.net/#openzfs #openzfs] on freenode ([http://webchat.freenode.net/?channels=openzfs web interface])<br />
** View answers via YouTube or Hangout; the host probably won't have time to type out responses.</div>Grahamperrinhttps://openzfs.org/w/index.php?title=Talk:Distributions&diff=1104Talk:Distributions2013-10-14T23:27:41Z<p>Grahamperrin: /* Shortlist of live CDs, DVDs et cetera */ new section</p>
<hr />
<div>== MacZFS ==<br />
<br />
The [[MacZFS | MacZFS page]] in this wiki: <br />
<br />
* outlines the development and testing of ZFS-OSX<br />
* complements the [https://github.com/zfs-osx/zfs/blob/master/README.markdown readme file at the ZFS-OSX page] on GitHub<br />
* complements the [http://maczfs.org MacZFS site]. <br />
<br />
Expect an eventual migration of at least some content to the MacZFS site. <br />
<br />
--[[User:Grahamperrin|Grahamperrin]] ([[User talk:Grahamperrin|talk]]) 18:34, 6 October 2013 (UTC)<br />
<br />
== Shortlist of live CDs, DVDs et cetera ==<br />
<br />
… including '''rescue discs''' and the like. <br />
<br />
The following list arises from discussions in IRC. From this ''draft'' we might draw a table to help people who seek a CD, DVD or USB flash drive '''at short notice''' – a rescue situation, for example.<br />
<br />
(Beyond a draft: I don't imagine a ''complete'' set of information moving to the main [[distributions]] page. That's a very prominent main page – aim to keep it as tidy as possible for parade purposes.) <br />
<br />
In alphabetical order: <br />
<br />
=== Admin CD ===<br />
<br />
… ''add a link''<br />
<br />
"… maintained by one of the Gentoo developers …"<br />
<br />
=== Gentoo ===<br />
<br />
http://www.gentoo.org/main/en/where.xml<br />
<br />
… ''add a few words''<br />
<br />
=== OmniOS ===<br />
<br />
http://omnios.omniti.com/wiki.php/Installation<br />
<br />
… ''add a few words''<br />
<br />
=== OpenIndiana ===<br />
<br />
http://openindiana.org/download/<br />
<br />
http://wiki.openindiana.org/oi/Advanced+-+Manual+installation+of+OpenIndiana+from+LiveCD+media<br />
<br />
… ''need to summarise the levels of support for features that are associated with OpenZFS''<br />
<br />
=== SystemRescueCd ===<br />
<br />
http://www.sysresccd.org/SystemRescueCd_Homepage<br />
<br />
==== Funtoo-maintained ZFS editions ====<br />
<br />
systemrescuecd-x86-3.7.1-zfs.iso<br />
<br />
* http://jonathanvasquez.com/files/sysresccd/3.7.1/systemrescuecd-x86-3.7.1-zfs.iso, http://jonathanvasquez.com/files/sysresccd/3.7.1/<br />
* ISO dated 2013-08-02<br />
<br />
sysresccd-3.7.1_zfs_0.6.2.iso<br />
<br />
* http://ftp.osuosl.org/pub/funtoo/distfiles/sysresccd/sysresccd-3.7.1_zfs_0.6.2.iso, http://ftp.osuosl.org/pub/funtoo/distfiles/sysresccd/<br />
* ISO dated 2013-10-12<br />
<br />
=== ZFSguru ===<br />
<br />
"… FreeBDS 9.2 was released a few weeks ago … expect ZFSGuru to support v5000 any day now …"<br />
<br />
ZFSguru-LiveCD-0.2-beta8-amd64-normal.iso<br />
<br />
* http://zfsguru.com/download<br />
* ISO dated 2012-11-01<br />
<br />
… ''need to summarise the levels of support for features that are associated with OpenZFS''<br />
<br />
--[[User:Grahamperrin|Grahamperrin]] ([[User talk:Grahamperrin|talk]]) 23:27, 14 October 2013 (UTC)</div>Grahamperrinhttps://openzfs.org/w/index.php?title=OpenZFS_Developer_Summit&diff=1101OpenZFS Developer Summit2013-10-13T00:38:23Z<p>Grahamperrin: Alphabetical order again.</p>
<hr />
<div>== OpenZFS Developer Summit 2013 ==<br />
Delphix is hosting a developer-focused event for OpenZFS. The goal of the event is to foster cross-platform community discussions of OpenZFS work, and to make progress on some of the projects proposed for this community.<br />
<br />
''We were previously calling this event "OpenZFS Day", but decided to rename it to reflect its target audience of ZFS developers.''<br />
<br />
The high-level agenda is:<br />
{|border="1" cellpadding="10"<br />
|- <br />
|valign="top"|Monday, Nov 18<br />
|<br />
* Talks<br />
* Breakout sessions<br />
* Hackathon planning<br />
* Beer bash<br />
|-<br />
|Tuesday, Nov 19<br />
|Hackathon (hopefully start work on some of the [[Projects]] the community has suggested)<br />
|}<br />
<br />
=== Location ===<br />
The event will be in the San Francisco Bay Area, most likely in San Francisco. The specific location will depend on how many people plan to attend. The hope is that we can have it at the [http://www.delphix.com/company/about-delphix/ Delphix office] in San Francisco. If it becomes too big, we'll have to reconsider and find a different location.<br />
<br />
=== Speaker Info ===<br />
'''Note: If you are in the room, you are potentially a speaker.''' This will be done in unconference style, so every attendee should come prepared to present or otherwise lead a discussion or session of up to 45 minutes. You can indicate potential topics in the registration table below.<br />
<br />
Equipment available:<br />
* Projector<br />
* Whiteboard<br />
<br />
=== Hackathon ===<br />
The goals of the hackathon are:<br />
* to get people working with ZFS engineers from outside their normal circles<br />
* to start work on some of the [[projects]] we'd like to accomplish<br />
Therefore, we should plan to work in small teams of 2-3 engineers. The team members could be pair-programming, splitting up the work into discrete tasks for each person, or advising / implementing.<br />
<br />
==== Hackathon ideas ====<br />
''Add your idea and your name below. Be prepared to explain your idea at the beginning of the hackathon and enlist/entice others to help with it.''<br />
* Userland ioctls: support for send/recv (fd operations over the wire) [[User:mahrens]]<br />
* larger (1MB) blocksize: shouldn't be too hard if we ignore performance impact [[User:mahrens]]<br />
* dedicated kmem_cache for dedup table entries<br />
* stdin / stdout buffer to improve performance of zfs send and receive<br />
* replace dn_ranges/free_range_t with range_tree_t [[User:mahrens]]<br />
<br />
=== Registration ===<br />
If you plan to attend the event, please edit this page and add yourself below, or contact [mailto:ann.togasaki@gmail.com ann.togasaki@gmail.com]. If you would like to present and/or have suggestions for what you would like to learn about, please include those details. We are expecting everyone will be there to contribute/participate. (If you need edit permission for this page, email your login name to [mailto:admin@open-zfs.org admin@open-zfs.org])<br />
<br />
'''The sign up deadline is 11:59pm Pacific Time on Sunday, October 20, 2013'''. We need to have a cutoff date so that we can plan for a space that is large enough to accommodate everyone who wants to attend.<br />
<br />
{|border="1" cellpadding="10"<br />
|- <br />
!| Name<br />
!| Affiliation<br />
!| What do you want to talk about?<br />
!| Your experience with ZFS<br />
!| Travel information<br />
!| T-shirt Size<br />
!| Food allergies/preferences? (please list)<br />
|-<br />
| [[User:mahrens | Matt Ahrens]]<br />
| Delphix<br />
| OpenZFS repo: what interfaces should be supported<br />
| Founded ZFS, OpenZFS<br />
| Local to SF<br />
| M<br />
| none<br />
|-<br />
|[[User:sanjeev | Sanjeev Bagewadi]]<br />
| Pluribus Networks<br />
| <br />
| Was part of the RPE team in Sun which fixed ZFS issues faced by customers<br />
| Will be in the Bay Area around that time<br />
| M<br />
| none<br />
|-<br />
| [[User:Max | Max Grossman]]<br />
| Delphix<br />
| Making it easier to get new ZFS developers up to speed (retrospective on the hole birth feature)<br />
| 3 months so far, still so much to learn...<br />
| Local<br />
| L<br />
| none<br />
|-<br />
| [[User:ahl | Adam Leventhal]]<br />
| Delphix<br />
| ZFS performance investigations?<br />
| RAID-Z2/3, performance work, some small ZFS tasks here and there<br />
| local<br />
| L<br />
| none<br />
|-<br />
| [[User:maxim | Maxim Martynov]]<br />
| <br />
| <br />
| <br />
| <br />
| M<br />
| none<br />
|-<br />
| [[User:csiden | Chris Siden]]<br />
| Delphix<br />
|<br />
| Worked on feature flags and async destroy<br />
| local<br />
| L<br />
| none<br />
|-<br />
| Alex Solomatnikov<br />
| <br />
| <br />
| <br />
| <br />
| M<br />
| none<br />
|-<br />
| [[User:gwilson | George Wilson]]<br />
| Delphix<br />
| ?<br />
| Implemented lots of SPA & VDEV stuff<br />
| flying in from Atlanta ~Monday - Thursday (TBD)<br />
| ?<br />
| none<br />
|}<br />
<br />
– ''please keep the table above sorted by last name'.'<br />
<br />
=== Sponsors ===<br />
Please contact [mailto:ann.togasaki@gmail.com ann.togasaki@gmail.com] if you'd like to be a sponsor of this event.<br />
<br />
Sponsorship opportunities include:<br />
<br />
* Breakfast (2 days)<br />
* Lunch (2 days)<br />
* Coffee Breaks (2 days)<br />
* Beer Bash (day 1)<br />
* T-Shirts <br />
* Unspecified - for all the miscellaneous expenses<br />
<br />
What do you get for sponsoring:<br />
<br />
* Your name/link on this page!<br />
* Thank you mention during the opening and closing<br />
* Space to put your pop-up banner at the conference venue<br />
* An opportunity to be known as a ZFS supporter in a very talented and influential community.</div>Grahamperrinhttps://openzfs.org/w/index.php?title=Projects&diff=1099Projects2013-10-12T13:10:54Z<p>Grahamperrin: Link from the encryption idea, to developer resources.</p>
<hr />
<div>== Active projects ==<br />
<br />
=== Resumable send/receive ===<br />
<br />
[https://www.illumos.org/issues/2605 illumos gate - Feature #2605: Partial/incremental ZFS send/receive - illumos.org]<br />
<br />
Work in progress by [[User:Csiden | Chris Siden]].<br />
<br />
=== Storage of small files in dnode === <br />
<br />
Work in progress by [[User:Mahrens | Matt Ahrens]].<br />
<br />
=== Raspberry Pi® support ===<br />
<br />
Based on ZFS on Linux, which already works on ARM. <br />
<br />
Unresolved issues include: running out of kernel virtual address space.<br />
<br />
Work in progress by [[User:Ryao | Ryao]].<br />
<br />
== Notes from meetings ==<br />
<br />
=== Brainstorm, 18th September 2013 ===<br />
<br />
[[Delphix_Brainstorming | Notes from the meeting that preceded Delphix's semi-annual Engineering Kick Off]] (EKO)<br />
* immediately pursuable ideas, plus long-term and strategic thoughts.<br />
<br />
== Inter-platform coordination ideas ==<br />
<br />
Ideas for projects that would help coordinate changes between platforms …<br />
<br />
=== Mechanism for pull changes from one place to another ===<br />
<br />
Make it easier to build, test, code review, and integrate ZFS changes into illumos.<br />
<br />
=== Cross-platform test suite ===<br />
<br />
One sourcebase, rather than porting STF to every platform?<br />
<br />
Maybe integrate [https://github.com/behlendorf/xfstests XFS Test Suite].<br />
<br />
=== Userland ZFS ===<br />
<br />
We already have ztest / libzpool and want to: <br />
* expand this to also be able to test more of zfs in userland<br />
* be able to run /sbin/zfs, /sbin/zpool against userland implementation<br />
* be able to run most of testrunner (and/or STF) test suite against userland implementation<br />
<br />
=== ZFS (ZPL) version feature flags ===<br />
<br />
Import ZFS on Linux sa=xattr into illumos.<br />
<br />
=== /dev/zfs ioctl interface versioning ===<br />
<br />
Ensure that future additions/changes to the interface maintain maximum compatibility with userland tools. <br />
<br />
Enable FreeBSD Linux jails / illumos lx brandz to use ZFS on Linux utilities. <br />
<br />
=== Port ZPIOS from ZFS on Linux to illumos ===<br />
<br />
[http://zfsonlinux.org/example-zpios.html ZPIOS example]<br />
<br />
This would require a rewrite to not use Linux interfaces.<br />
<br />
=== Virtual machine images with OpenZFS ===<br />
<br />
To easily try OpenZFS on a choice of distributions within a virtual machine:<br />
* images could be built for running on public clouds<br />
* images for installing to real hardware.<br />
<br />
[[Talk:Project_Ideas#Virtual_machine_images | Discuss]] …<br />
<br />
== General feature ideas ==<br />
<br />
=== [[Projects/ZFS Channel Programs | ZFS channel programs]] ===<br />
<br />
=== Device removal ===<br />
<br />
Based on indirect vdevs, rather than bprewrite.<br />
<br />
=== Reflink support ===<br />
<br />
[http://lwn.net/Articles/331808/ The two sides of reflink() <nowiki>[LWN.net]</nowiki>]<br />
<br />
=== Unified ashift handling ===<br />
<br />
[http://www.listbox.com/member/archive/182191/2013/07/search/YXNoaWZ0/sort/subj/page/3/entry/7:58/20130703201427:AEA03DD0-E43E-11E2-A883-F4AAC72FE4D2/ <nowiki>[illumos-zfs]</nowiki> Specifying ashift when creating vdevs] (2013-07-03)<br />
<br />
=== 1MB blocksize ===<br />
<br />
Preferably compatible with pool version 32, as pool-feature-flag. <br />
<br />
=== RAID-Z hybrid allocator ===<br />
<br />
Preferably compatible with pool version 29 for Solaris 10u11 compatibility.<br />
<br />
=== Replace larger ZIO caches with explicit pages ===<br />
<br />
Subproject: document useful kernel interfaces for page manipulation on various platforms<br />
<br />
=== Improved SPA namespace collision management ===<br />
<br />
Needed mostly by virtual machine hosts. Work in progress in Gentoo.<br />
<br />
Temporary pool names in zpool import <br />
* [http://www.listbox.com/member/archive/182191/2013/07/search/YXNoaWZ0/sort/subj/page/3/entry/6:58/20130701131204:56A77554-E271-11E2-8F75-EDC51164E148/ <nowiki>[illumos-zfs]</nowiki> RFC: zpool import -t for temporary pool names] (2013-07-01)<br />
<br />
Temporary pool names in zpool create. <br />
<br />
=== TRIM support ===<br />
<br />
Realtime TRIM. <br />
<br />
Free space TRIM: <br />
<br />
* walk metaslab space maps and issue discard commands to the vdevs.<br />
<br />
=== Platform agnostic encryption support ===<br />
<br />
Preferably compatible with pool version 30, as pool-feature-flag.<br />
<br />
[[Developer resources]] include a link to a November 2010 blog post by Oracle. <br />
<br />
The early ZFS encryption code published in the zfs-crypto repository of OpenSolaris.org could be a starting point. A copy is available from [[User:Ryao | Richard Yao]] upon request.<br />
<br />
=== Deduplication improvements ===<br />
<br />
[http://www.listbox.com/member/archive/182191/2013/02/search/Ymxvb20gZmlsdGVycw/sort/time_rev/page/1/entry/8:16/20130212183221:70E13332-756C-11E2-996D-F0C715E11FC0/ Bloom filter].<br />
<br />
Convert synchronous writes to asynchronous writes when an ARC miss occurs during a lookup against the DDT.<br />
<br />
Use dedicated kmem_cache for deduplication table entries: <br />
* easy to implement<br />
* will reduce DDT entries from 512-bytes to 320-bytes.<br />
<br />
=== ZFS Compression / Dedup to favour provider ===<br />
<br />
Currently, as a storage provider, if a customer has 100MB of quota available, and upload 50MB of data<br />
which compresses/dedups to 25MB. The customer's quota is only reduced by 25MB. The reward favours the customer.<br />
It is desirable as a provider, to be able to reverse this logic such that the customer's quota is reduced by<br />
50MB and the 25MB compression/dedup saved, is to the provider's benefit. Similar to how Google/Amazon/Cloud-Feature.acme already handles it. You get 2G of quota, and any compression saved is to Google's benefit.<br />
<br />
* property(?) to charge quota usage by before-compression-dedup size.<br />
<br />
== Lustre feature ideas ==<br />
<br />
The [http://www.lustre.org/ Lustre project] supports the use of ZFS as an Object Storage Target. They maintain their [http://wiki.lustre.org/index.php/Architecture_-_ZFS_for_Lustre#ZFS_Features_Required_by_Lustre own feature request page] with ZFS project ideas. Below is a list of project ideas that are well defined, benefit Lustre and have no clear benefit outside of that context.<br />
<br />
=== Collapsible ZAP objects ===<br />
<br />
E.g. fatzap -> microzap downgrades.<br />
<br />
=== Data on separate devices ===<br />
<br />
[http://wiki.lustre.org/index.php/Architecture_-_ZFS_for_Lustre#Data_on_Separate_Devices Architecture - ZFS for Lustre] …<br />
<br />
=== Large dnodes ===<br />
<br />
[http://wiki.lustre.org/index.php/Architecture_-_ZFS_large_dnodes Architecture - ZFS large dnodes] …<br />
<br />
=== TinyZAP ===<br />
<br />
[http://wiki.lustre.org/index.php/Architecture_-_ZFS_TinyZAP Architecture - ZFS TinyZAP] …<br />
<br />
== Awareness-raising ideas ==<br />
<br />
… awareness of the [[Main_Page | quality, utility, and availability]] of open source implementations of ZFS. <br />
<br />
=== Quality ===<br />
<br />
Please add or [[Talk:Projects | discuss]] your ideas. <br />
<br />
=== Utility ===<br />
<br />
==== ZFS and OpenZFS in three minutes (or less) ====<br />
<br />
A very short and light video/animation to grab the attention of people who don't yet realise why ZFS is an extraordinarily good thing. <br />
<br />
For an entertaining example of how a little history (completely unrelated to storage) can be taught in ninety seconds, see [http://www.youtube.com/watch?v=sqohqlTnLrE&list=PL2E867DCE2D1CEF00 Hohenwerfen Fortress - The Imprisoned Prince Bishop] ([http://www.salzburg-burgen.at/en/werfen/ context]) (part of the [http://www.zonemedia.at/en/projects/ ZONE Media] portfolio).<br />
<br />
A very short video for ZFS and OpenZFS might throw in all that's good, using plain english wherever possible, including: <br />
* very close to the beginning, the word ''resilience''<br />
* ''verifiable integrity of data'' and so on<br />
* some basic comparisons (NTFS, HFS Plus, ReFS)<br />
<br />
– with the 2010 fork in the midst but (blink and you'll miss that milestone) the lasting impression from the video is that '''ZFS is great''' ('''years ahead of the alternatives''') and OpenZFS is rapidly making it better for a broader user base. <br />
<br />
Hint: there exist many ZFS-related videos but many are a tad dry, and cover a huge amount of content. Aim for two minutes :-) … [[Talk:Projects | discuss…]]<br />
<br />
=== Availability ===<br />
<br />
Please add or [[Talk:Projects | discuss]] your ideas. <br />
<br />
=== General ===<br />
<br />
The [http://www.youtube.com/channel/UC0IK6Y4Go2KtRueHDiQcxow OpenZFS channel on YouTube], begun October 2013 – to complement the automatically generated [http://www.youtube.com/channel/HCNjOOYCUqXF8 ZFS] channel.<br />
<br />
https://twitter.com/DeirdreS/status/322422786184314881 (2013-02) draws attention to ZFS-related content amongst [http://www.beginningwithi.com/2013/04/11/technical-videos/ videos listed by Deirdré Straughan].</div>Grahamperrinhttps://openzfs.org/w/index.php?title=Developer_resources&diff=1098Developer resources2013-10-12T08:03:50Z<p>Grahamperrin: AKAs and links to two more blog posts.</p>
<hr />
<div>== Ways to contact people ==<br />
* [[Contributors | ZFS experts]]<br />
* [[Mailing list]]<br />
* IRC: [irc://chat.freenode.net/#openzfs #openzfs] on freenode ([http://webchat.freenode.net/?channels=openzfs web interface])<br />
* Twitter: [https://twitter.com/OpenZFS @openzfs]<br />
* [[OpenZFS Office Hours]]: rotating the leader/owner<br />
* Pointers to other mailing lists and repos?<br />
<br />
== Ongoing work ==<br />
* Test framework<br />
* One of our goals is to [[reduce code differences]].<br />
** list of [[platform code differences]]<br />
* [[Projects]]<br />
** [[Projects/ZFS Channel Programs | ZFS Channel Programs]]<br />
<br />
== Implementation documentation ==<br />
* Links to source code are on the [[Distributions]] page<br />
* Architectural/high-level documentation about general OpenZFS concepts<br />
** [[Documentation/ZfsSend|zfs send]]<br />
** [[Documentation/Administrative Commands | administrative commands]] (e.g. <code>zfs snapshot -r pool/fs@snap</code>)<br />
** [[Documentation/ZFS I/O | zfs I/O]]<br />
<br />
=== Materials on other websites ===<br />
<br />
[http://maczfs.googlecode.com/files/ZFSOnDiskFormat.pdf ZFS On-Disk Specification – Draft] (ZFSOnDiskFormat.pdf, Sun Microsystems, Inc., 2006-08) <br />
* sometimes known as the ''ZFS On-Disk Format'' document<br />
* a good overview, but sorely outdated.<br />
<br />
[http://www.youtube.com/watch?v=BIxVSqUELNc Examining ZFS On-Disk Format Using mdb and zdb] (2008-06-28)<br />
* a forty-three minute video of Max Bruning presenting to the OpenSolaris Developer Conference in Prague.<br />
<br />
The [http://java.net/projects/solaris-zfs/pages/Sourcetour source tour] ([http://web.archive.org/web/20130316073014/http://hub.opensolaris.org/bin/view/Community+Group+zfs/source archive]) describes the various subcomponents in ZFS.<br />
<br />
=== Blog posts on ZFS features ===<br />
<br />
Adaptive Replacement Cache, also known as Adjustable Replacement Cache (ARC)<br />
<br />
* [http://www.c0t0d0s0.org/archives/5329-Some-insight-into-the-read-cache-of-ZFS-or-The-ARC.html Some insight into the read cache of ZFS - or: The ARC - c0t0d0s0.org] (2009-02-20)<br />
* [http://dtrace.org/blogs/brendan/2012/01/09/activity-of-the-zfs-arc/ Brendan's blog » Activity of the ZFS ARC] (2012-01-09)<br />
* [https://pthree.org/2012/12/07/zfs-administration-part-iv-the-adjustable-replacement-cache/ Aaron Toponce : ZFS Administration, Part IV- The Adjustable Replacement Cache] (2012-12-07)<br />
<br />
Block allocation<br />
<br />
* [https://blogs.oracle.com/bonwick/en_US/entry/zfs_block_allocation ZFS Block Allocation (Jeff Bonwick's Blog)] (2006-11-04)<br />
<br />
Deduplication<br />
<br />
* [https://blogs.oracle.com/bonwick/en_US/entry/zfs_dedup ZFS Deduplication (Jeff Bonwick's Blog)] (2009-11-01)<br />
<br />
Encryption<br />
<br />
* [https://blogs.oracle.com/darren/entry/zfs_encryption_what_is_on ZFS encryption what is on disk ? (darren_moffat@blog$ cat /dev/mem | grep /dev/urandom)] (2010-11-19)<br />
<br />
Hot spares<br />
<br />
* [https://blogs.oracle.com/eschrock/entry/zfs_hot_spares ZFS Hot Spares (Eric Schrock's Weblog)] (2006-06-06)<br />
<br />
Level 2 Adaptive Replacement Cache, also known as Level 2 Adjustable Replacement Cache (L2ARC)<br />
<br />
* [https://blogs.oracle.com/brendan/entry/test ZFS L2ARC (Brendan Gregg)] (2008-07-22)<br />
* [https://blogs.oracle.com/brendan/entry/l2arc_screenshots L2ARC Screenshots (Brendan Gregg)] (2009-01-30)<br />
* [http://blog.harschsystems.com/2010/09/08/arcstat-pl-updated-for-l2arc-statistics/ arcstat.pl updated for L2ARC statistics | Mike Harsch's Blog] (2010-09-08)<br />
* [http://mirror-admin.blogspot.com/2011/12/how-l2arc-works.html Days of a mirror admin: How the L2ARC works] (2011-12)<br />
* [https://pthree.org/2012/12/07/zfs-administration-part-iv-the-adjustable-replacement-cache/ Aaron Toponce : ZFS Administration, Part IV- The Adjustable Replacement Cache] (2012-12-07)<br />
<br />
RAID-Z<br />
<br />
* [https://blogs.oracle.com/bonwick/en_US/entry/raid_z RAID-Z (Jeff Bonwick's Blog)] (2005-11-17)<br />
<br />
Scrub and resilver<br />
<br />
* [https://blogs.oracle.com/ahrens/entry/new_scrub_code New Scrub Code (Matthew Ahrens' Weblog)] (2008-12-15)<br />
<br />
Snapshots<br />
<br />
* [https://blogs.oracle.com/ahrens/entry/is_it_magic Is it magic? (Matthew Ahrens' Weblog)] (2005-11-17)<br />
<br />
Space maps<br />
<br />
* [https://blogs.oracle.com/bonwick/entry/space_maps Space Maps (Jeff Bonwick's Blog)] (2007-09-13)<br />
<br />
ZFS Intent Log (ZIL)<br />
<br />
* [https://blogs.oracle.com/perrin/entry/the_lumberjack ZFS: The Lumberjack (Neil Perrin's Weblog)] (2005-11-16)<br />
* [https://pthree.org/2012/12/06/zfs-administration-part-iii-the-zfs-intent-log/ Aaron Toponce : ZFS Administration, Part III- The ZFS Intent Log] (2012-12-06)<br />
<br />
== Repo-specific developer documentation ==<br />
* [[Illumos integration process]]<br />
* Information about how to develop ZFS for the different distributions/pointers to them (e.g., how to build illumos)<br />
** in particular, documentation about how to test and possibly scripts for building<br />
** needs to be written/links provided by reps from those communities.</div>Grahamperrinhttps://openzfs.org/w/index.php?title=Developer_resources&diff=1097Developer resources2013-10-12T07:52:55Z<p>Grahamperrin: Correction to typos in dates. Movement of one blog post to under the ARC heading.</p>
<hr />
<div>== Ways to contact people ==<br />
* [[Contributors | ZFS experts]]<br />
* [[Mailing list]]<br />
* IRC: [irc://chat.freenode.net/#openzfs #openzfs] on freenode ([http://webchat.freenode.net/?channels=openzfs web interface])<br />
* Twitter: [https://twitter.com/OpenZFS @openzfs]<br />
* [[OpenZFS Office Hours]]: rotating the leader/owner<br />
* Pointers to other mailing lists and repos?<br />
<br />
== Ongoing work ==<br />
* Test framework<br />
* One of our goals is to [[reduce code differences]].<br />
** list of [[platform code differences]]<br />
* [[Projects]]<br />
** [[Projects/ZFS Channel Programs | ZFS Channel Programs]]<br />
<br />
== Implementation documentation ==<br />
* Links to source code are on the [[Distributions]] page<br />
* Architectural/high-level documentation about general OpenZFS concepts<br />
** [[Documentation/ZfsSend|zfs send]]<br />
** [[Documentation/Administrative Commands | administrative commands]] (e.g. <code>zfs snapshot -r pool/fs@snap</code>)<br />
** [[Documentation/ZFS I/O | zfs I/O]]<br />
<br />
=== Materials on other websites ===<br />
<br />
[http://maczfs.googlecode.com/files/ZFSOnDiskFormat.pdf ZFS On-Disk Specification – Draft] (ZFSOnDiskFormat.pdf, Sun Microsystems, Inc., 2006-08) <br />
* sometimes known as the ''ZFS On-Disk Format'' document<br />
* a good overview, but sorely outdated.<br />
<br />
[http://www.youtube.com/watch?v=BIxVSqUELNc Examining ZFS On-Disk Format Using mdb and zdb] (2008-06-28)<br />
* a forty-three minute video of Max Bruning presenting to the OpenSolaris Developer Conference in Prague.<br />
<br />
The [http://java.net/projects/solaris-zfs/pages/Sourcetour source tour] ([http://web.archive.org/web/20130316073014/http://hub.opensolaris.org/bin/view/Community+Group+zfs/source archive]) describes the various subcomponents in ZFS.<br />
<br />
=== Blog posts on ZFS features ===<br />
<br />
Adaptive Replacement Cache (ARC)<br />
<br />
* [http://www.c0t0d0s0.org/archives/5329-Some-insight-into-the-read-cache-of-ZFS-or-The-ARC.html Some insight into the read cache of ZFS - or: The ARC - c0t0d0s0.org] (2009-02-20)<br />
* [http://dtrace.org/blogs/brendan/2012/01/09/activity-of-the-zfs-arc/ Brendan's blog » Activity of the ZFS ARC] (2012-01-09)<br />
<br />
Block allocation<br />
<br />
* [https://blogs.oracle.com/bonwick/en_US/entry/zfs_block_allocation ZFS Block Allocation (Jeff Bonwick's Blog)] (2006-11-04)<br />
<br />
Deduplication<br />
<br />
* [https://blogs.oracle.com/bonwick/en_US/entry/zfs_dedup ZFS Deduplication (Jeff Bonwick's Blog)] (2009-11-01)<br />
<br />
Encryption<br />
<br />
* [https://blogs.oracle.com/darren/entry/zfs_encryption_what_is_on ZFS encryption what is on disk ? (darren_moffat@blog$ cat /dev/mem | grep /dev/urandom)] (2010-11-19)<br />
<br />
Hot spares<br />
<br />
* [https://blogs.oracle.com/eschrock/entry/zfs_hot_spares ZFS Hot Spares (Eric Schrock's Weblog)] (2006-06-06)<br />
<br />
Level 2 Adaptive Replacement Cache (L2ARC)<br />
<br />
* [https://blogs.oracle.com/brendan/entry/test ZFS L2ARC (Brendan Gregg)] (2008-07-22)<br />
* [https://blogs.oracle.com/brendan/entry/l2arc_screenshots L2ARC Screenshots (Brendan Gregg)] (2009-01-30)<br />
* [http://blog.harschsystems.com/2010/09/08/arcstat-pl-updated-for-l2arc-statistics/ arcstat.pl updated for L2ARC statistics | Mike Harsch's Blog] (2010-09-08)<br />
* [http://mirror-admin.blogspot.com/2011/12/how-l2arc-works.html Days of a mirror admin: How the L2ARC works] (2011-12)<br />
<br />
RAID-Z<br />
<br />
* [https://blogs.oracle.com/bonwick/en_US/entry/raid_z RAID-Z (Jeff Bonwick's Blog)] (2005-11-17)<br />
<br />
Scrub and resilver<br />
<br />
* [https://blogs.oracle.com/ahrens/entry/new_scrub_code New Scrub Code (Matthew Ahrens' Weblog)] (2008-12-15)<br />
<br />
Snapshots<br />
<br />
* [https://blogs.oracle.com/ahrens/entry/is_it_magic Is it magic? (Matthew Ahrens' Weblog)] (2005-11-17)<br />
<br />
Space maps<br />
<br />
* [https://blogs.oracle.com/bonwick/entry/space_maps Space Maps (Jeff Bonwick's Blog)] (2007-09-13)<br />
<br />
ZFS Intent Log (ZIL)<br />
<br />
* [https://blogs.oracle.com/perrin/entry/the_lumberjack ZFS: The Lumberjack (Neil Perrin's Weblog)] (2005-11-16)<br />
<br />
== Repo-specific developer documentation ==<br />
* [[Illumos integration process]]<br />
* Information about how to develop ZFS for the different distributions/pointers to them (e.g., how to build illumos)<br />
** in particular, documentation about how to test and possibly scripts for building<br />
** needs to be written/links provided by reps from those communities.</div>Grahamperrin