Difference between revisions of "OpenZFS Developer Summit"

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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.
{{:OpenZFS Developer Summit 2016}}
 
''We were previously calling this event "OpenZFS Day", but decided to rename it to reflect its target audience of ZFS developers.''
 
== Huge THANK YOU to our generous sponsors ==
{|cellpadding="10"
|-
|[[File: Delphix logo.png|200x200px|link=http://delphix.com]]
|[[File: Ddrdrive logo dev 2013.png|200x200px|link=http://www.ddrdrive.com]]
|[[File: Logo freebsdfoundation.png|200x200px|link=http://www.freebsd.org]]
|-
|[[FIle: SageCloud-logo-RGB-large-optimized.jpg|200x200px|link=http://sagecloud.com/]]
|[[File: Ixsystems.jpg|200x200px|link=http://www.ixsystems.com/]]
|[[File: CS logo withTagline 150px.png|200x200px|link=http://cloudscaling.com/]]
|-
|[[File: SpectraLogicLogo.jpg|200x200px|link=http://www.spectralogic.com/]]
|[[File: Joyent-logo.png|200x200px|link=http://joyent.com]]
|[[File: New_hac_logo.jpg|200x200px|link=http://www.high-availability.com/]]
|-
|[[File: Nexenta logo.jpg|200x200px|link=http://www.nexenta.com/]]
|}
 
== Schedule ==
 
If you are unable to attend in person, you can view the video stream live, on Monday November 18th from 9am - 6pm Pacific time.  The URL for the stream will be posted here Monday, and a recording will be available after the event.
 
=== Sunday, November 17th ===
{|border="1" cellpadding="10"
|-
|6:30pm
| Optional dinner at [http://goo.gl/943i5i Rosamunde Sausage Grill] on Mission St.
Location is a 3 minute walk from the 24th Street BART station.
|}
 
=== Monday, November 18th ===
{|border="1" cellpadding="10"
|-
|valign="top"|8:30am - 9:00am
| Registration and breakfast
|-
|valign="top"|9:00am - 9:15am
| Introductions
|-
|valign="top"|9:15am - 9:45am
| State of OpenZFS & Event overview (Matt Ahrens)
|-
|valign="top"|9:45am - 10:00am
| List and prioritize discussion topics (lead by Matt Ahrens & Karyn Ritter)
|-
|valign="top"|10:00am - 11:00am
| Discussion sessions
|-
|valign="top"|11:00am - 11:15am
| Coffee & snack break
|-
|valign="top"|11:15am - 12:15pm
| Discussion sessions
|-
|valign="top"|12:15am - 1:00pm
| Lunch
|-
|valign="top"|1:00pm - 1:30pm
| Discussion session: Community Management (lead by Karyn Ritter)
|-
|valign="top"|1:30pm - 3:00pm
| Discussion sessions
|-
|valign="top"|3:00pm - 3:30pm
| Coffee & snack break
|-
|valign="top"|3:30pm - 5:30pm
| Discussion sessions
|-
|valign="top"|5:30pm - 5:45pm
| Closing (Matt Ahrens)
|-
|valign="top"|5:45pm
| Beer bash & casual dinner at Delphix office
|}
 
=== Tuesday, November 19th ===
{|border="1" cellpadding="10"
|-
|valign="top"|9:00am - 9:30am
| Breakfast
|-
|valign="top"|9:30am - 10:00am
| Discuss Hackathon ideas & form teams
|-
|valign="top"|10:00am - 12:30pm
|Hackathon
|-
|valign="top"|12:30pm - 1:30pm
|Lunch
|-
|valign="top"|1:30pm - 5:00pm
|Hackathon
|-
|valign="top"|5:00pm - 5:45pm
| Hackathon presentations
|-
|valign="top"|6:00pm
| 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]
Location is 5 minute walk from Delphix office.
|}
 
Note that the optional, off-site dinners on Sunday and Tuesday are at your own expense.
 
== Location ==
The event will be in the [http://www.delphix.com/company/about-delphix/ Delphix office] in San Francisco:
 
[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]
 
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:
* BART to the Montgomery St. Station + 3 minute walk
* Caltrain to the 4th & King station + 25 minutes walk
* Caltrain to the 4th & King station + bus (routes 10, 30, or 45)
* drive + park in a lot (costs about $25/day e.g. 41 Tehama Street, 509 Howard Street, or 55 Hawthorne Street)
 
== Discussion Topics ==
'''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:
 
# Contentious topics that we need to get widespread agreement on
# Reports of work in progress that need input from others
 
Topics that have been proposed:
* OpenZFS code repository (Matt)
** what code changes are needed to make this a success
** process & procedure (code review, testing, committers)
* Performance on full or fragmented pools (George, Ned, Alfred)
** block allocator improvements
* Portable implementation of FMA functionality for Linux & FreeBSD (e.g. for hot spare activation) (Brian)
* OpenZFS community organization (Karyn, Jordan, Matt)
* Storage tiering (Boris)
* How to investigate ZFS performance problems (Adam)
* Test suite (John K)
* ZFS Channel Programs (Chris, Max G, Matt)
* how to examine the ZFS on-disk format with MDB (Max B)
* Interactions with virtual memory subsystem (Brian, Jorgen)
** dealing with swap on zfs
** how the VM system handles large memory allocations
* Scalability on large systems, known bottlenecks (Kirill)
* How to educate new ZFS developers (Max G)
* Disk management - identification, drive spin down/up (John L)
* Resumable send/recv (Boris, Max G, Chris)
 
== Hackathon ==
The goals of the hackathon are:
* to get people working with ZFS engineers from outside their normal circles
* to start work on some of the [[projects]] we'd like to accomplish
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.
 
=== Hackathon ideas ===
''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.''
* Userland ioctls: support for send/recv (fd operations over the wire)  [[User:mahrens]]
* larger (1MB) blocksize: shouldn't be too hard if we ignore performance impact [[User:mahrens]]
* dedicated kmem_cache for dedup table entries
* stdin / stdout buffer to improve performance of zfs send and receive
* ZFS mechanism to override devices' reported sector size (512 vs 4k) (alex @ delphix)
* feature flags enhancements for send streams [[User:csiden]]
* set owner of all files within a filesystem with a ZFS property [[User:csiden]]
* dynamic taskqs for ZIO [[User:ahl]]
* towards Oracle Solaris ZFS compatibility [[User:ahl]]
* RAIDzN -- full, arbitrary RAID-7 [[User:ahl]]
* Testrunner suite running on other platforms (John Kennedy)
** or at least identify what is preventing it from running
 
== Registration ==
We are expecting everyone will be there to contribute/participate.
 
'''The sign up deadline has passed'''.  A few spots are available for late registration.  Mail [mailto:admin@open-zfs.org admin@open-zfs.org] if you would like to attend.
 
{|border="1" cellpadding="10"
|-
!| Name
!| Affiliation
!| What do you want to talk about?
!| Your experience with ZFS
!| Travel information
!| T-shirt Size
!| Food allergies/preferences? (please list)
|-
| [[User:mahrens | Matt Ahrens]]
| Delphix
| OpenZFS repo: what interfaces should be supported
| Founded ZFS, OpenZFS
| Local to SF
| M
| none
|-
|[[User:sanjeev | Sanjeev Bagewadi]]
| Pluribus Networks
|
| Was part of the RPE team in Sun which fixed ZFS issues faced by customers
| Will be in the Bay Area around that time
| M
| none
|-
|-
| Ned Bass
| LLNL
| Common code base, block allocator improvements
| ZFS on Linux port, Lustre integration
| from East Bay
| XL
| vegetarian preferred
|-
| [[User:behlendorf | Brian Behlendorf]]
| LLNL
| Portable memory management & FMA infrastructure
| ZFS on Linux Maintainer
| Local to east Bay Area
| XL
| none
|-
| Max Bruning
| Joyent
| examining ZFS on-disk format with MDB
| leads ZFS training classes
| ?
| ?
| ?
|-
| Steven Burgess
| Datto Inc.
| openZFS as a customer
| Working as a developer at a company whose product uses ZOL
| from NYC
| M
| none
|-
| [[User:kdavyd | Kirill Davydychev]]
| Nexenta
| Scalability on large systems, major known bottlenecks.
| Debugging, performance analysis/tuning
| Houston
| M
| none
|-
| Justin Gibbs
| Spectra Logic
| Ref-Links, Resilvering Algorithm, Spares, auto-configuration
| DMU performance work
| flying in from CO
| L
| vegetarian
|-
| [[User:Max | Max Grossman]]
| Delphix
| Making it easier to get new ZFS developers up to speed (retrospective on the hole birth feature)
| 3 months so far, still so much to learn...
| Local
| L
| none
|-
| Jordan Hubbard
| iXsystems
| OpenZFS community organization, independent code repo processes
| ?
| Local
| ?
| ?
|-
| Jeremy Jones
| Delphix
| ?
| ZFS bookmarks; debugging techniques
| local
| ?
| ?
|-
| [[User:jkennedy | John Wren Kennedy]]
| Delphix
| Uniform test coverage for OpenZFS
| Supported ZFS in RPE at Sun/Oracle, and test ZFS in QA at Delphix.
| Denver
| L
| none
|-
| [[User:jml | John Layman]]
| SageCloud
| Interested in disk management (spin up/down disks, drive identification, etc.)
| Been working with ZFS on Linux for a few months, contributed small bugfix
| Boston
| XL
| none
|-
| [[User:ahl | Adam Leventhal]]
| Delphix
| ZFS performance investigations?
| RAID-Z2/3, performance work, some small ZFS tasks here and there
| local
| L
| none
|-
| [[User:delphij | Xin Li]]
| iXsystems
| ZFS developer for FreeBSD, TrueNAS and FreeNAS products
| FreeBSD deputy security officer / release engineering team member
| local Bay Area
| L
| none
|-
| [[User:lundman | Jorgen Lundman]]
| GMO Internet
| ZFS, portability
| ZFS on OS X
| Tokyo
| XL
| none
|-
| [[User:maxim | Maxim Martynov]]
|
|
|
|
| M
| none
|-
| Robert Mustacchi
| Joyent
|
| Misc. debugging
| Local to SF
| L
| None
|-
| [[User:tonyn | Tony Nguyen]]
| Nexenta
|
| Misc. debugging, import and I/O performance
| flying in from Denver
| M
| None
|-
| Alfred Perlstein
| iXsystems
| ZFS performance and debugging
| FreeNAS (FreeBSD+ZFS) developer
| ?
| ?
| ?
|-
| Boris Protopopov
| Nexenta
| Resumable send/recv, defrag, storage tiering, spare management, doing fancy things with vdevs
| ZFS dev lead at Nexenta, ZFS extensions for enterprise class features and performance
| Boston
| M
| None
|-
| [[User:awreece | Alex Reece]]
| Delphix
|
| small bug fixes
| local
| M
| No marinera
|-
| [[User:kritter | Karyn Ritter]]
| Delphix
| Community management (discussion)
|
| local
| M
|
|-
| [[User:rodrigc | Craig Rodrigues]]
| iXsystems
| ZFS developer for TrueNAS and FreeNAS products
| FreeBSD release engineering team member
| local
| L
| none
|-
| [[User:csiden | Chris Siden]]
| Delphix
| ZFS Channel Programs, feature flags enhancements for send streams
| Worked on feature flags and async destroy
| local
| L
| none
|-
| Alex Solomatnikov
|
|
|
|
| M
| none
|-
| [[User:pks | Prashanth Sreenivasa ]]
|
| I would like to learn more about ZIL, ZFS I/O scheduler & pipeline and impact of using flash-disks instead of conventional hard-disks.
| 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.
|
| M
|
|-
| [[User:prakashsurya | Prakash Surya]]
| LLNL
|
| Misc. work on Linux port. Much to learn, still.
| Local to east Bay Area
| M
| none
<!--
|-
| Ilya Usvyatsky
| Nexenta
| resumable send/recv, defrag
| ?
| ?
| ?
| ?
-->
|-
| Rafael Vanoni
| Pluribus
| I'm not a ZFS developer, but would like to work my way towards that.
| I worked on the thread scheduler/dispatcher at Sun/Oracle
| ?
| M
| ?
|-
| [[User:gwilson | George Wilson]]
| Delphix
| performance on full & fragmented pools
| Implemented lots of SPA & VDEV stuff
| flying in from Atlanta ~Monday - Wednesday
| L
| none
|-
| Matt Youds
| High Availability
|
| Experience with ZFS configuration at High-Availability.
|
| L
| Fish
|-
| Sam Zaydel
| ?
| ?
| ?
| ?
| ?
| ?
|}
 
– ''please keep the table above sorted by last name.''
 
== Sponsors ==
The event is fully sponsored!  Thank you to our sponsors:
 
* Breakfast (2 days) - Sponsored!  Thank you [http://www.cloudscaling.com Cloudscaling] and [http://www.ixsystems.com iXsystems]
* Lunch  (2 days) - Sponsored!  Thank you [http://sagecloud.com Sage Cloud], [http://www.spectralogic.com Spectra Logic] and [http://www.freebsdfoundation.org FreeBSD Foundation]
* Coffee Breaks (2 days) - Sponsored!  Thank you [http://www.ixsystems.com iXsystems]
* Beer Bash (day 1) - Sponsored!  Thank you [http://www.ddrdrive.com DDRdrive]
* T-Shirts  - Sponsored!  Thank you [http://www.dexlphix.com Delphix]
* Video Recordings - Thank you [http://www.joyent.com Joyent]
* Cash Donation for expenses - Thank you [http://www.nexenta.com Nexenta] and [http://www.high-availability.com/ High-Availability]
 
What do you get for sponsoring:
 
* Your name/link on this page!
* Thank you mention during the opening and closing
* Space to put your pop-up banner at the conference venue
* An opportunity to be known as a ZFS supporter in a very talented and influential community.

Revision as of 19:47, 7 June 2016

OpenZFS Dev Summit 2016

The fourth annual OpenZFS Developer Summit was held in San Francisco, California.

The goal of the event is to foster cross-community discussions of OpenZFS work and to make progress on some of the projects we have proposed. This 2-day event consists of a day of presentation and a 1-day hackathon.

Check out the following blog posts about the event:


Thank You 2016 Sponsors!

Platinum Sponsors

  • Delphix
  • Intel
  • OSNexus
  • Nexenta
  • datto

Gold Sponsors

  • Syneto
  • iXSystems

Silver Sponsors

  • FreeBSD Foundation
  • High Availability
  • Canonical

Presentations

Click on the title of the presentation for more details.

Title Speaker Company Video Slides
State of the Union Matt Ahrens Delphix Video Slides
Keynote Dustin Kirkland Canonical Video N/A
Lustre, Supercomputers, and ZFS Brian Behlendorf LLNL Video Slides
ZFS and Containers Michael Crogan Video Slides
Channel Programs Sara Hartse & Chris Williamson Delphix Video Slides
ZFS First Mount Mark Shellenbaum Oracle Video Slides
Scrub/Resilver Performance Saso Kiselkov Nexenta Video Slides
ZFS-Native Encryption Tom Caputi Datto Video Slides
Fault Management Don Brady & Justin Gibbs Intel & FreeBSD Foundation Video Slides
ZFS Validation & QA Sydney Vanda & John Salinas Intel Video Slides
Closing Matt Ahrens Delphix Video N/A

Hackathon

We had lightning (5 minute) updates on the following projects which have been discussed at previous conferences:

Title Speaker Previous Talk
ABD solves large/fragmented memory Dan Kimmel & David Chen Slides Video (2015)
Eager Zero George Wilson Slides Video (2015)
Compressed Send and Receive Dan Kimmel Slides Video (2015)
Device Removal Matt Ahrens Slides Video (2014)
Parity Declustered RAID for ZFS (DRAID) Isaac Huang Slides Video (2015)
SPA Metadata Allocation Classes Don Brady Slides Video (2015)
Redacted send/receive Paul Dagnelie Slides Video (2015)
Persistent L2ARC and TRIM Saso Kiselkov Slides Video (2015)
SPA import and pool recovery Pavel Zakharov

Hackathon Projects

Congratulations to our 4 "best in show" winners, who received Intel Compute Sticks, donated by Intel.

  • zpool checkpoint (Dan Kimmel, Serapheim Dimitropoulos). Allows reverting the entire pool to a previous state.
  • preferred ashift (George Wilson). Allows dynamically switching to 4K sector aligned allocations
  • zstd compression algo (Saso Kiselkov). Better compression ratio & faster than zlib/gzip.
  • testing encryption with Illumos debug kernel (Tom Caputi & Dan McDonald). Using ::findleaks and kmem_flags=0xf to find bugs in encryption implementation

Thanks to everyone who participated at the hackathon!

  • John Kennedy - zpool wait
  • Pavel, Don, Steve, George - special metadata vdev classes
  • Richard Elling - timing zil_replay
  • Prakash - automated pull request testing for openzfs
  • Alek P - async delete, port dnode backfill patch from Linux to OpenZFS
  • Steven Burgess & Intel QA folks- platform-independent test suite changes
  • Richard Laager - Linux pull requests, Ubuntu Root-on-ZFS HOWTO LUKS updates
  • David Chen - ABD Linux code testing
  • Alexander Motin - slog performance investigations
  • Prashanth - large dnode from Linux to Illumos
  • SMART data in pool stats
  • ZoL buildbot check style
  • Chris W - upstreaming channel programs
  • Paul D - compatibility layer
  • Matt - upstreaming device removal
  • Jim Salter - Updating OpenZFS Roadmap


Sponsorship

A huge thank you for all the companies sponsoring the OpenZFS Developers Summit!

As an OpenZFS Dev Summit sponsor, you are providing critical support to our annual event, without which it would not be able to continue. Your generous contributions pay for the venue, food and beverage expenses, live streaming service, and other miscellaneous goods and services.

Harrasment Policy

OpenZFS Developer Summit is dedicated to providing a harassment-free conference experience for everyone, regardless of gender, gender identity and expression, sexual orientation, disability, physical appearance, body size, race, age or religion. We do not tolerate harassment of conference participants in any form. Sexual language and imagery is not appropriate for any conference venue, including talks. Conference participants violating these rules may be sanctioned or expelled from the conference at the discretion of the conference organizers.

For information about last year's event, see the OpenZFS Developer Summit 2015 page.