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From: Joel Becker on 22 Jun 2010 18:20
On Tue, Jun 22, 2010 at 05:34:59PM -0400, Jeff Moyer wrote:
> Running iozone with the fsync flag, or fs_mark, the performance of CFQ is
> far worse than that of deadline for enterprise class storage when dealing
> with file sizes of 8MB or less. I used the following command line as a
> representative test case:
>
> fs_mark -S 1 -D 10000 -N 100000 -d /mnt/test/fs_mark -s 65536 -t 1 -w 4096 -F

I'd be interested in how ocfs2 does, because we use jbd2 too.

Joel

--

Life's Little Instruction Book #139

"Never deprive someone of hope; it might be all they have."

Joel Becker
Principal Software Developer
Oracle
E-mail: joel.becker(a)oracle.com
Phone: (650) 506-8127
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Next: 2.6.34-rc5-git7 (plus all patches) -- another suspicious rcu_dereference_check() usage.