> Multiple pools on one server only makes sense if you are going to have
> different RAS for each pool for business reasons.  It's a lot easier to
> have a single pool though.  I recommend it.

A couple of other things to consider to go with that recommendation.

- never build a pool larger than you are willing to restore.   Bad
things can still happen that would require you to restore the entire
pool.  Convenience and SLAs aren't always in agreement :-)   The
advances in ZFS availability might make me look at my worst case
restore scenario a little different though - but there will still
be a restore case that worries me.

- as I look at the recent lifecycle improvements with zones (in the
Solaris 10 context of zones), I really like upgrade on attach.   That
means I will be slinging zones more freely.   So I need to design my
pools to match that philosophy.

- if you are using clustering technologies, pools will go hand in
hand with failover boundaries.   So if I have multiple failover
zones, I will have multiple pools.


Bob


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