Re: [gentoo-server] It's amazing what switching the IO scheduler can do.

[William Kenworthy]

Hi, is there any guide as to what scheduler is best for what purposes?
I have used CFQ since the early days as I was rather unhappy with the
performance of 2.6 as against 2.4, but I am finding the latest 2.6
kernels do not seem to be running as well as the earlier ones with this
scheduler - so I presume there have have been changes/improvements etc
that may mean I need to reassess what I am using.

BillK


On Sat, 2005-08-06 at 13:24 +0100, Kerin Millar wrote:
> On 8/6/05, Paul Kölle <pkoelle@×××××.com> wrote:
> > A. Khattri wrote:
> >
> > > I had a (dumb?) question: if you enable all the schedulers in a 2.6
> > > kernel, which one is picked as the default?
> > And how do I change it if all three are built in?
> >
>
> The elevator is set per block device and can be changed via sysfs.
> Here is an example of how to change it for /dev/sda:
>
> # echo deadline > /sys/block/sda/queue/scheduler
>
> Cheers,
>
> --Kerin Millar
>
-- 
William Kenworthy <billk@×××××××××.au>
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