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Welcome to OpenZFS

Planning is underway for the eleventh annual OpenZFS Developer Summit. This in-person event will be held in San Francisco Oct 16-17 (Mon-Tue), 2023.

OpenZFS Developer Summit 2023

The 2023 OpenZFS Developer Summit will be held in San Francisco, October 16-17th. Register to attend.


Title Speaker Company
Dedup Performance Allan Jude Klara Systems
OpenZFS at scale: learning, challenges, and awesome customers Sam Atkinson AWS
Idmapped Mount Support in ZFS and its Application Youzhong Yang MathWorks
Shared Log Pool Paul Dagnelie Delphix
RAIDZ Expansion Matt Ahrens; Don Brady Delphix, FreeBSD Foundation; iXsystems
Z.I.A. Accelerates ZFS Compression, Checksumming, and RAIDZ Jason Lee Los Alamos National Labs

See OpenZFS Developer Summit 2022 for presentations and information about last year's conference.


Please email for details.

Thanks to our Diamond Sponsors

  • Delphix

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: