Re: CSCAN vs CFQ I/O scheduler benchmark results

From: Jens Axboe
Date: Sun Jun 11 2006 - 14:57:57 EST


On Fri, Jun 09 2006, Vishal Patil wrote:
> The machine configuation is as follows
> CPU: Intel(R) Pentium(R) 4 CPU 2.80GHz
> Memory: 1027500 KB (1 GB)
> Filesystem: ext3
> Kernel: 2.6.16.2

You don't mention the storage used, which is quite relevant.

If you have the time, please rerun with 2.6.17-rc6-gitX latest. Although
I'm not sure why you think CSCAN is a good scheduling algorithm, in
general it may be fine but there are trivial non-root 'dos' attacks. Any
of the non-noop Linux io schedulers is a better choice imo.

--
Jens Axboe

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