Date: Wed, 29 Dec 2010 17:47:29 +0000 From: Matthew Seaman <m.seaman@infracaninophile.co.uk> To: Freek van Hemert <fvhemert@gmail.com> Cc: freebsd-stable@freebsd.org Subject: Re: slow ZFS on FreeBSD 8.1 Message-ID: <4D1B7431.7070808@infracaninophile.co.uk> In-Reply-To: <AANLkTim2oV3phJ4bTFL_ENNZYknm7Gjt_3uFdMd1UpYd@mail.gmail.com> References: <AANLkTinfYync_BG3zV028Or4ZgHe5iQ2tLVd1mn4a0r%2B@mail.gmail.com> <4D1AF388.3080107@infracaninophile.co.uk> <AANLkTim2oV3phJ4bTFL_ENNZYknm7Gjt_3uFdMd1UpYd@mail.gmail.com>
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On 29/12/2010 08:57, Freek van Hemert wrote:
> The hacks sounds good until 8.2 is released however, regarding this upg=
rade,
> is the on-disk format the same? Can I just add the pool to a new instal=
l (of
> 8.2-RC) and expect higher performance? Or do I need to recreate the poo=
l
> 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
--=20
Dr Matthew J Seaman MA, D.Phil. 7 Priory Courtyard
Flat 3
PGP: http://www.infracaninophile.co.uk/pgpkey Ramsgate
JID: matthew@infracaninophile.co.uk Kent, CT11 9PW
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