Brandon, You're probably hitting this CR:
http://bugs.opensolaris.org/bugdatabase/view_bug.do?bug_id=6924824 I'm tracking the existing dedup issues here: http://hub.opensolaris.org/bin/view/Community+Group+zfs/dedup Thanks, Cindy On 04/29/10 23:11, Brandon High wrote:
I tried destroying a large (710GB) snapshot from a dataset that had been written with dedup on. The host locked up almost immediately, but there wasn't a stack trace on the console and the host required a power cycle, but seemed to reboot normally. Once up, the snapshot was still there. I was able to get a dump from this. The data was written with b129, and the system is currently at b134. I tried destroying it again, and the host started behaving badly. 'less' would hang, and there were several zfs-auto-snapshot processes that were over an hour old, and the 'zfs snapshot' processes were stuck on the first dataset of the pool. Eventually the host became unusable and I rebooted again. The host seems to be fine now, and is currently running a scrub. Any ideas on how to avoid this in the future? I'm no longer using dedup due to performance issues with it, which implies that the DDT is very large. bh...@basestar:~$ pfexec zdb -DD tank DDT-sha256-zap-duplicate: 5339247 entries, size 348 on disk, 162 in core DDT-sha256-zap-unique: 1479972 entries, size 1859 on disk, 1070 in core -B
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