illumos is the repo of record for OpenZFS[1], which is the community fork of OpenSolaris' ZFS (which is now proprietary). Most of the really cool new features a

illumos is the repo of record for OpenZFS[1], which is the community fork of OpenSolaris' ZFS (which is now proprietary). Most of the really cool new features are in OpenZFS because it has far more developer involvement (from FreeBSD, illumos, etc). [1]: http://open-zfs.org/wiki/Main_Page http://open-zfs.org/wiki/Main_Page