i might be wrong because i'm kind of new but i THINK you need to disable automatic snapshots when resilvering, at least on the older version you did.
if not it would restart every time a new snapshot was made....but then again, i may be wrong. On Fri, Jul 10, 2009 at 6:18 PM, Galen <gal...@zinkconsulting.com> wrote: > I know this topic has been discussed many times... but what the hell makes > zpool resilvering so slow? I'm running OpenSolaris 2009.06. > > I have had a large number of problematic disks due to a bad production > batch, leading me to resilver quite a few times, progressively replacing > each disk as it dies (and now preemptively removing disks.) My complaint is > that resilvering ends up taking... days! The average write rate to the disk > being resilvered is 1 to 3 MB/sec. > > You can see zpool status and iostat -v output here: > http://pastebin.com/mcbb8dfd > > When I read files off the zpool, I get quite a few MB/sec even in a > degraded state, although the zpool is idle while resilvering in this case - > no snapshots or anything happening on it. The system has 3 GB of RAM and a > 2.8 GHz dual core CPU which is always >90% idle while resilvering. The > number of I/O operations per second is nowhere near the disk's limits. > Scrubbing takes 3-4 hours at the most, so it's clearly not a read > bottleneck. Even if I have a configuration where only one disk is being > replaced (and all others are OK), I never pass the 1-3 MB/sec limit. > > What is going on? I have had to resilver 4 times so far, and I have to > resilver at least once more. Each resilvering takes a day or two, and I cant > see why... it's not CPU, it's not sustained read throughput, it's not IOPS, > so what is it?? > > Galen > _______________________________________________ > zfs-discuss mailing list > zfs-discuss@opensolaris.org > http://mail.opensolaris.org/mailman/listinfo/zfs-discuss >
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