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Welcome to OpenZFS


OpenZFS was announced in September 2013 as the truly open source successor to the ZFS project. Our community brings together developers from the illumos, FreeBSD, Linux, and OS X platforms, and a wide range of companies that build products on top of OpenZFS.

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:

illumos Webpage GitHub
FreeBSD Webpage GitHub
ZFS on Linux Webpage GitHub
OpenZFS on OS X Webpage GitHub

OpenZFS Developer Summit 2017 <-- click for more info

The fifth annual OpenZFS Developer Summit will be held in San Francisco, October 24-25th, 2017.

  • Become a sponsor -- send email to kritter at delphix dot com for details
  • Register using EventBrite
  • Submit talk proposals to

Thank you to the 2017 Platinum sponsors for their support!

  • datto
  • Delphix
  • GitHub
  • OpenDrives


The high-level goals of OpenZFS are:

  • to raise awareness of the quality, utility, and availability of open source implementations of ZFS
  • to encourage open communication about ongoing efforts to improve open source ZFS
  • to ensure consistent reliability, functionality, and performance of all distributions of ZFS.

The main technical goal of OpenZFS is easier sharing of code between platforms. Strategies include:

We perform automated testing on all OpenZFS Pull Requests, which run on public cloud infrastructure (Amazon AWS). We accept donations to cover our AWS bills.

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:

ZFS User Conference

The first ZFS User Conference was held March 16-17, 2017, in Norwalk CT. Videos and slides from the conference are available here:

Site orientation

All main pages (alphabetical order) …