Message-ID: <464B2AC2.10206@redhat.com>
Date: Wed, 16 May 2007 12:01:06 -0400
From: Chuck Ebbert <cebbert@redhat.com>
Organization: Red Hat
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To: Chris Mason <chris.mason@oracle.com>
CC: linux-kernel@vger.kernel.org
Subject: Re: filesystem benchmarking fun
References: <20070516144205.GV26766@think.oraclecorp.com>
In-Reply-To: <20070516144205.GV26766@think.oraclecorp.com>
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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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