slow ZFS on FreeBSD 8.1

[Matthew Seaman]

On 29/12/2010 08:57, Freek van Hemert wrote:
> The hacks sounds good until 8.2 is released however, regarding this upgrade,
> is the on-disk format the same? Can I just add the pool to a new install (of
> 8.2-RC) and expect higher performance? Or do I need to recreate the pool
> with the newer versions of the utilities?

No -- the on-disk format is different.  ZFS will run fine with the older
on-disk formats, but you won't get the full benefits without updating
them.   You'll need to run both 'zpool update -a' and 'zfs update -a' --
this is a non-reversible step, so be certain you will never need to
downgrade before doing it.  Also, you *will* need to update gptzfsboot
on your drives, or you will come to a sticky end if you try and reboot.
 Something like this:

   # gpart bootcode -b /boot/pmbr -p /boot/gptzfsboot -i 1 ad0

	Cheers,

	Matthew

-- 
Dr Matthew J Seaman MA, D.Phil.                   7 Priory Courtyard
                                                  Flat 3
PGP: http://www.infracaninophile.co.uk/pgpkey     Ramsgate
JID: matthew at infracaninophile.co.uk               Kent, CT11 9PW

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