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Welcome to OpenZFS

OpenZFS Developer Summit 2021

OpenZFS Dev Summit 2021

The ninth annual OpenZFS Developer Summit was held online, Nov 8-9 (Mon-Tue).


Title Speaker Company Slides/video
State of OpenZFS Matt Ahrens slides video
DirectIO for ZFS Brian Atkinson Los Alamos National Lab slides video
ZFS on Object Storage George Wilson, Matt Ahrens, Paul Dagnelie, Manoj Joseph Delphix slides video
ZFS performance on Windows Imtiaz Mohammad DataCore slides video
A New ZIL That Keeps Up With Persistent Memory Latency Christian Schwarz Independent slides video
ZettaCache: fast access to slow storage Mark Maybee, Serapheim Dimitropoulos Delphix slides video
Improving ZFS send/recv Jitendra Patidar Nutanix slides video
Adding Logical Quotas to ZFS Sanjeev Bagewadi Nutanix slides video
VDEV Properties Allan Jude, Mark Maybee Klara Systems, Delphix slides video

Hackathon presentations video


This year's hackathon will have a focus on quality. How can you help improve the quality of OpenZFS in one day?

  • Improve documentation (manpages, website, etc)
  • Triage bugs - look through the bug tracker and find critical issues that we should be prioritizing
  • Fix bugs identified by triage process
  • Review pull requests to ensure the quality of changes being made
  • additional hackathon ideas

Hackathon presentations video


Please email for details.

Thanks to our Diamond Sponsors

  • Delphix

OpenZFS Developer Summit 2020

The 2020 OpenZFS Developer Conference was held October 6-7, as an online conference.

Title Speaker Company Presentation/Video
State of OpenZFS Matt Ahrens Delphix Slides Video
ZFS Caching: How Big Is the ARC? George Wilson Delphix Slides Video
Persistent L2ARC George Amanakis Independent Slides Video
ZIL Performance Improvements for Fast Media Saji Nair Nutanix Slides Video
Sequential Reconstruction Mark Maybee Cray Slides Video
dRAID, Finally! Mark Maybee Cray Slides Video
Send/Receive Performance Enhancements Matt Ahrens Delphix Slides Video
Improving “zfs diff” performance with reverse-name lookup Sanjeev Bagewadi & David Chen Nutanix Slides Video
Performance Troubleshooting Tools Gaurav Kumar Nutanix Slides Video
File Cloning with Block Reference Table Pawel Dawidek Fudo Security Slides Video
Hacking presentations, voting & awards everyone Video

Introduction to OpenZFS

OpenZFS is an open-source storage platform. It includes the functionality of both traditional file systems and volume manager. It has many advanced features including:

  • Protection against data corruption. Integrity checking for both data and metadata.
  • Continuous integrity verification and automatic “self-healing” repair
    • Data redundancy with mirroring, RAID-Z1/2/3 [and DRAID]
  • Support for high storage capacities — up to 256 trillion yobibytes (2^128 bytes)
  • Space-saving with transparent compression using LZ4, GZIP or ZSTD
  • Hardware-accelerated native encryption
  • Efficient storage with snapshots and copy-on-write clones
  • Efficient local or remote replication — send only changed blocks with ZFS send and receive

Contributing to OpenZFS

The OpenZFS project brings together developers from the Linux, FreeBSD, illumos, MacOS, and Windows platforms. OpenZFS is supported by a wide range of companies.

There are many ways to contribute to OpenZFS including:

Get Started with OpenZFS

Frequently Asked Questions

OpenZFS concepts

A non-exhaustive list of OpenZFS features

OpenZFS Technical Resources

How to install OpenZFS

OpenZFS manual pages

Feature Details. Detailed subsystem/feature blogs, on-disk format specifications: Developer Resources

We accept donations to cover our ongoing costs.

OpenZFS is an associated project of SPI (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: