Sorry if this is well known.. I tried a bunch of googles, but didnt get anywhere useful. Closest I came, was http://mail.opensolaris.org/pipermail/zfs-discuss/2009-April/028090.html but that doesnt answer my question, below, reguarding zfs mirror recovery. Details of our needs follow.
We normally are very into redundancy. Pretty much all our SAN storage is dual ported, along with all our production hosts. Two completely redundant paths to storage. Two independant SANs. However, now, we are encountering a need for "tier 3" storage, aka "not that important, we're going to go cheap on it" ;-) That being said, we'd still like to make it as reliable and robust as possible. So I was wondering just how robust it would be to do ZFS mirroring, across 2 sans. My specific question is, how easily does ZFS handle *temporary* SAN disconnects, to one side of the mirror? What if the outage is only 60 seconds? 3 minutes? 10 minutes? an hour? If we have 2x1TB drives, in a simple zfs mirror.... if one side goes temporarily off line, will zfs attempt to resync **1 TB** when it comes back? Or does it have enough intelligence to say, "oh hey I know this disk..and I know [these bits] are still good, so I just need to resync [that bit]" ? -- This message posted from opensolaris.org _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
