linux-kernel - Re: filesystem benchmarking fun

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Message-ID: <464B2AC2.10206@redhat.com>
Date:	Wed, 16 May 2007 12:01:06 -0400
From:	Chuck Ebbert <cebbert@...hat.com>
To:	Chris Mason <chris.mason@...cle.com>
CC:	linux-kernel@...r.kernel.org
Subject: Re: filesystem benchmarking fun

Chris Mason wrote:
> For example, I'll pick on xfs for a minute.  compilebench shows the
> default FS you get from mkfs.xfs is pretty slow for untarring a bunch of
> kernel trees.  Dave Chinner gave me some mount options that make it
> dramatically better, but it still writes at 10MB/s on a sata drive that
> can do 80MB/s.  Ext3 is better, but still only 20MB/s. 
> 

Now try JFS. My lawn grows faster than it can write a new kernel tree.

What we need is a tool that shows *why* this stuff happens...

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