> >Oh, one more comment. If you don't mirror your ZIL, and your > unmirrored SSD > >goes bad, you lose your whole pool. Or at least suffer data > corruption. > > Hmmm, I thought that in that case ZFS reverts to the "regular on disks" > ZIL?
I see the source for some confusion. On the ZFS Best Practices page: http://www.solarisinternals.com/wiki/index.php/ZFS_Best_Practices_Guide It says: Failure of the log device may cause the storage pool to be inaccessible if you are running the Solaris Nevada release prior to build 96 and a release prior to the Solaris 10 10/09 release. It also says: If a separate log device is not mirrored and the device that contains the log fails, storing log blocks reverts to the storage pool. ... At the time when I built my system (Oct 2009) this is what it said: At present, until [http://bugs.opensolaris.org/view_bug.do?bug_id=6707530 CR 6707530] is integrated, failure of the log device may cause the storage pool to be inaccessible. Protecting the log device by mirroring will allow you to access the storage pool even if a log device has failed. _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
