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 2017}}
 
Video recordings of the presentations are available [http://www.beginningwithi.com/2013/11/18/openzfs-developer-summit/ here].
 
''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 15:58, 12 June 2017


OpenZFS Dev Summit 2017

The fifth annual OpenZFS Developer Summit was held October 24-25, 2017 in San Francisco. As with previous years: 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. The first day of the event is presentations, and the second day is combined presentations and a hackathon. New contributors are welcome at the hackathon!

Talks: Day 1

Main talks, typically 45 minutes each.

Title Speaker Company Video Slides
State of the Union Matt Ahrens Delphix Video Slides
Keynote: ZFS Past & Future Mark Maybee Oracle Video Slides
ZSTD Compression Allan Jude ScaleEngine Video Slides
Fast Clone Deletion Sara Hartse Delphix Video Slides
MMP: Safe "zpool import" for Clusters Olaf Faaland LLNL Video Slides
Porting With OSX Jorgen Lundman GMO Video Slides
Faster Allocation with the Log Spacemap Serapheim Dimitropoulos Delphix Video Slides
iFlash: Dynamic Adaptive L2ARC Caching Shailendra Tripathi Tegile Video Slides
DRAID Isaac Huang Intel Video Slides
ZIL Performance: How I Doubled Sync Write Speed Prakash Surya Delphix Video Slides

Talks: Day 2

Shorter talks, around 15 minutes each.

Title Speaker Company Video Slides
"Oh Shift!" changing the allocation size George Wilson Delphix Video Slides
A proposal for 1,000x better dedup performance Matt Ahrens Delphix Video Slides
New prefetcher for sequential scrub Tom Caputi Datto Video Slides
Storage Pool Checkpoint Serapheim Dimitropoulos Delphix Video Slides
Improving resilver: results & operational impacts Saso Kiselkov Nexenta Video Slides
RAID-Z Expansion Matt Ahrens Delphix + FreeBSD Foundation Video Slides

Hackathon Projects

Audience choice awards:

Prize Project Participants
1st place ZTOUR, which mixes ZDB with FUSE, allowing you to explore the internals of the ZFS on-disk format with a file browser Don Brady, Pavel Zakharov, Prashanth Sreenivasa
2nd place FIEMAP, which makes file segment info from ZFS available via the standard Linux API Brian Behlendorf
3rd place MDB on Linux: porting the illumos kernel debugger MDB to Linux Seb Roy, Serapheim Dimitropoulos, Prakash Surya, John Kennedy

Additional projects:

Uploading videos from this morning
FreeNAS Test Integration
ZFS Property Setting in Channel Programs
Compressed+deduped send stream bug fix
Metaslab allocation PR testing
Proposed deduplication improvements
Combined smart compression and backing off compression level
zfs send / receive for windows
Optimized Fletcher4 port to illumos
Man page updates for Linux (default values)
Benchmark to create large directory structures
ztest reproducibility
Tags for controlling the ZFS Test Suite

Thank You 2017 Sponsors!

Platinum Sponsors

  • datto
  • Delphix
  • GitHub
  • MPSTOR
  • Nexenta
  • OpenDrives
  • OSNEXUS
  • OVH

Gold Sponsors

  • Intel
  • iXSystems
  • Syneto

Silver Sponsors

  • FreeBSD Foundation
  • rsync.net

Bronze Sponsors

  • reevert

Coffee Sponsor

  • MyNAS

Harassment 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 2016 page.