zfs/zpool upgrade required?

[Jeremy Chadwick]

On Wed, May 04, 2011 at 01:02:56PM +0200, Robert Schulze wrote:
> when upgrading from 8.0 to 8-STABLE, kernel and userland support new
> versions of ZFS pool and filesystem.
> 
> Is it _required_ to upgrade existing pools and filesystems or can
> that be done anytime later?

- It can be done later, though by not upgrading you lose the ability to
use newer features.  For a list of what those are, refer to the
official OpenSolaris docs.  See menu on left side, near bottom:

http://hub.opensolaris.org/bin/view/Community+Group+zfs/whatis

- Make sure to note that the pool version and the filesystem version are
separate.  Some folks remember to "zpool upgrade" but not "zfs upgrade".

- Remember that upgrading is one-way; you cannot roll back to an older
version without destroying your pools.  If you're worried, do full
backups beforehand.

-- 
| Jeremy Chadwick                                   jdc at parodius.com |
| Parodius Networking                       http://www.parodius.com/ |
| UNIX Systems Administrator                  Mountain View, CA, USA |
| Making life hard for others since 1977.               PGP 4BD6C0CB |