Date: Wed, 29 Dec 2010 19:56:48 -0500 From: Dan Langille <dan@langille.org> To: freebsd-stable@freebsd.org Subject: Re: slow ZFS on FreeBSD 8.1 Message-ID: <4D1BD8D0.5010402@langille.org> In-Reply-To: <4D1B7431.7070808@infracaninophile.co.uk> References: <AANLkTinfYync_BG3zV028Or4ZgHe5iQ2tLVd1mn4a0r%2B@mail.gmail.com> <4D1AF388.3080107@infracaninophile.co.uk> <AANLkTim2oV3phJ4bTFL_ENNZYknm7Gjt_3uFdMd1UpYd@mail.gmail.com> <4D1B7431.7070808@infracaninophile.co.uk>
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On 12/29/2010 12:47 PM, Matthew Seaman wrote: > 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 This part applies only if you're booting from ZFS drives? -- Dan Langille - http://langille.org/
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