Re: Confused by performance

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On Mon, May 24, 2010 at 2:08 PM, K. Richard Pixley <rich@xxxxxxxx> wrote:
> I've just started to work with btrfs so I started with a benchmark.  On four
> identical servers, (2 dual core cpus, single local disk), I built
> filesystems - ext3, ext4, nilfs2, and btrfs.  I checked out a sizable code
> tree and timed a build.  The build is parallelized to use 4 threads when
> possible.
>
> I'm seeing similar build times on ext[34] and nilfs2 but I'm seeing almost
> double the times for btrfs using default options.  And I'm having trouble
> reconciling this performance cost with the benchmarks I'm seeing around the
> net.
>
> Is this a common result?  Is there a trick to getting ext4 competitive
> performance out of btrfs?  Is my application a poor choice for btrfs?  Am I
> missing something obvious here?
>

Please make sure you're testing with the latest btrfs from git or
linus latest kernel.
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