On 07/25/09 02:50 PM, David Magda wrote:
Yes, it can be affected. If the snapshot's data structure / record is underneath the corrupted data in the tree then it won't be able to be reached.
Can you comment on if/how mirroring or raidz mitigates this, or tree corruption in general? I have yet to lose a pool even on a machine with fairly pathological problems, but it is mirrored (and copies=2). I was also wondering if you could explain why the ZIL can't repair such damage. Finally, a number of posters blamed VB for ignoring a flush, but according to the evil tuning guide, without any application syncs, ZFS may wait up to 5 seconds before issuing a synch, and there must be all kinds of failure modes even on bare hardware where it never gets a chance to do one at shutdown. This is interesting if you do ZFS over iscsi because of the possibility of someone tripping over a patch cord or a router blowing a fuse. Doesn't this mean /any/ hardware might have this problem, albeit with much lower probability? Thanks _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
