Backup strategy for large mailbox stores

Vincent Fox vbfox at
Fri Feb 19 11:06:11 EST 2010

Eric Luyten wrote:
> Our Z pool was 83% full ...
> Deleted the December snapshots, which brought that figure down to 74%
> Performance came right back  :-)
Running close to full you will eventually run into fragmentation 
issues.  Fortunately
you can grow the size of a pool while it's hot, get some more LUNs 
allocated and
just do a zpool add.  Highly recommend it until there's a patch to add 
defrag for ZFS pools.  You're the first person I've read using iSCSI 
though doesn't
that add a bunch of latency?  And 7200 RPM SATA to boot.

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