Re: yum upgrade on btrfs very slow

Tomasz Torcz
2009-10-26T13:35:35Z

On Mon, Oct 26, 2009 at 05:55:45PM +0900, Chris Mason wrote:
> On Wed, Oct 21, 2009 at 11:27:33AM +0200, Tomasz Torcz wrote:
> > On Thu, Oct 01, 2009 at 11:01:46AM +0200, Tomasz Torcz wrote:
> > > On Wed, Sep 30, 2009 at 09:43:51PM +0200, Tomasz Torcz wrote:
> > > > >
> > > > > If you're comparing w/ext3 and wondering why btrfs is sooooooo much
> > > > > slower it might be because btrfs has barriers on by default and ext3
> > > > > doesn't. You could mount -o nobarrier for btrfs or mount -o barrier=1
> > > > > for ext3 for a proper comparison.
> >
> > Last update: things got noticably faster with 2.6.31.4-88.fc12.x86_64,
> > which contains backport of latest mainline btrfs (thank you, Josef!).
> > No more comlains from me (for now ;).
>
> Fantastic. Are you running with or without barriers now?

I stick to default settings, that means barriers I think. Overall, my
test hardware is so slow by itself, that barriers are not really noticable.
(It's 3 GHz Pentium 4 in 64 bit with single IDE 20GB drive).

--
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