Oracle dumped OpenSolaris in Fall 2010, and it is unclear if Oracle will continue to publicly release updates to ZFS, except maybe after they release their next major version of Solaris.
FreeBSD now has ZFS v28 available for testing.
But where did v28 come from? I notice that the main ZFS website does not show version 28 available. Has this website been abandoned? If so, where is the central website for the ZFS project, so that I can browse the repo, read the mailing lists, read the release notes, etc.
(I realize that OpenSolaris has been dumped by Oracle, and that they are limiting their ZFS releases to the community).
Much has happened since I asked this question in October 2010.
As of September 2013, a new collaboration known as OpenZFS will serve as a central site for several ZFS projects. The new site is http://open-zfs.org/ (with a dash)
Today at LinuxCon North America, Brian Behlendorf and Matthew Ahrens are announcing that members from the illumos, zfsonlinux.org, FreeBSD and MacOSX ZFS communities have created a project called "OpenZFS" to combine their efforts.
Here is the announcement to the FreeBSD community from FreeBSD Foundation President Justin Gibbs, and the announcement to the illumos community from Matthew Ahrens at Delphix.
Brian Behlendorf (creator of zfsonlinux.org) announced this on [email protected] today:
Old news from December 2012:
Oracle is still pretty closed about it's ZFS development.
As ZFS outside of Oracle is concerned, the primary upstream seems to be illumos. The major players in the non-Oracle ZFS scene all seem to be collaborating on the illumos kernel, which provides ZFS.
Oracle officially killed OpenSolaris, so the website will not be updated anymore. FreeBSD is working with the IllumOS project to advance ZFS at this point (their website is still a bit scant on details). I don't know if these changes are derived from actual Solaris 11 development or not, nor if the changes will be merged into the official project (a likely outcome).
The zfs mailing list remains on opensolaris.org, and Oracle has not established a new public website for their ongoing ZFS development project.
Update (2013): The opensolaris.org website has now been shut down, and Oracle’s ZFS mailing list has moved to the new Solaris-ZFS.java.net website.
For versions up to 28, you can still browse the repository in OpenSolaris web site:
http://src.opensolaris.org/source/history/onnv/onnv-gate/usr/src/uts/common/sys/fs/zfs.h
http://src.opensolaris.org/source/xref/onnv/onnv-gate/usr/src/uts/common/sys/fs/zfs.h#348
Update:
This repository has moved to:
https://java.net/projects/solaris/sources/on-src/content/usr/src/uts/common/sys/fs/zfs.h?rev=13149
For Linux it is http://zfsonlinux.org - there is ZFS Pool Version 28.
Pawel Jakub Dawidek (nickname: PJD) has added the latest open-source ZFS file system version (28) to FreeBSD Current. I suppose FreeBSD ZFS's Home is here http://wiki.freebsd.org/ZFS
Above are kernel's modules. But there is kernel independent application for Linux in user space http://zfs-fuse.net/ (for 2011-Nov ZFS for Linux 0.7.0 uses Pool Version 23).