On Thu, Aug 27, 2009 at 01:37:11PM -0600, Dave wrote:
> Can anyone from Sun comment on the status/priority of bug ID 6761786? 
> Seems like this would be a very high priority bug, but it hasn't been 
> updated since Oct 2008.
> 
> Has anyone else with thousands of volume snapshots experienced the hours 
> long import process?

It might not be direct ZFS fault. I tried to reproduce this on FreeBSD
and I was able to import pool with ~2000 ZVOLs and ~10000 ZVOL snapshots
in few minutes. Those were empty ZVOLs and empty snapshots, so keep that
in mind. All in all creating /dev/ entries might be slow in Solaris
that's why experience this behaviour when importing ZFS pool with many
ZVOLs and many ZVOL snapshots (note that every ZVOL snapshot is a device
entry in /dev/zvol/, not like with file systems where snapshots are
mounted on .zfs/snapshot/<name> lookup and not on import time).

-- 
Pawel Jakub Dawidek                       http://www.wheel.pl
p...@freebsd.org                           http://www.FreeBSD.org
FreeBSD committer                         Am I Evil? Yes, I Am!

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