slow ZFS on FreeBSD 8.1

[Freek van Hemert]

Thanx for all the replies.
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?

On 29 December 2010 09:38, Matthew Seaman
<m.seaman at infracaninophile.co.uk>wrote:

> On 28/12/2010 23:56, Freek van Hemert wrote:
> > I have a question regarding zfs on freebsd.
> > (I'm making a home server)
> > This afternoon I did a "zpool create data mirror ad4 ad6" Now I'm copying
> > things from my ufs2 disk into the 2TB zpool, it is very slow. I'm on
> freebsd
> > 8.1 amd64 on an atom n330 with 2 sata disks, gstat tells me I'm going at
> > around 2 mbps at near 100  %busy while the ufs2 drives are near 0. Also,
> > ufs2 to ufs2 was much faster (I estimate about 10 times faster). How do I
> > tune? The wiki is not helpful for amd64 users stating that the defaults
> > should be optimal. I'm using the 8.1-stable version which has just been
> > installed this afternoon from a minimal install iso.
>
> Upgrade to one of the 8.2 release candidates or to a recent RELENG_8 /
> stable/8 -- there has been serious work done on ZFS since 8.1-RELEASE
> including the import of ZFS v15, and it is a lot more performant.
>
> Or wait a few weeks and then upgrade to 8.2-RELEASE.
>
>        Cheers,
>
>        Matthew
>
> --
> Dr Matthew J Seaman MA, D.Phil.                   7 Priory Courtyard
>                                                  Flat 3
> PGP: http://www.infracaninophile.co.uk/pgpkey     Ramsgate
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>
>