On Thu, 13 Dec 2007, Louis-David Mitterrand wrote:
Hi,
after reading some interesting suggestions on kernel tuning at:
http://hep.kbfi.ee/index.php/IT/KernelTuning
I am wondering whether 'deadline' is indeed the best IO scheduler (vs.
anticipatory and cfq) for a soft raid5/6 partition on a server?
What is the common wisdom on the subject among linux-raid users and
developers?
Thanks,
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I have found anticipatory to be the fastest.
http://home.comcast.net/~jpiszcz/sched/cfq_vs_as_vs_deadline_vs_noop.html
Sequential:
Output of CFQ: (horrid): 311,683 KiB/s
Output of AS: 443,103 KiB/s
Input CFQ is a little faster.
It depends on your workload I suppose.
Justin.
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