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Re: [Xen-users] disk scheduler?

To: "Dylan Martin" <dmartin@xxxxxxxxxxxx>
Subject: Re: [Xen-users] disk scheduler?
From: "Todd Deshane" <deshantm@xxxxxxxxx>
Date: Mon, 3 Nov 2008 19:56:55 -0500
Cc: xen-users@xxxxxxxxxxxxxxxxxxx
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On Mon, Nov 3, 2008 at 6:14 PM, Dylan Martin <dmartin@xxxxxxxxxxxx> wrote:
> Is there a way to give priority access to the disks in the same way
> that the sched-credit system gives priority access to CPU?
>
> Basically, disk is my bottleneck and some of my domUs are of an
> obviously lower priority than others.  I'd like to say that domU A
> gets to use the disk only half as often as domU B and so forth.
>

I don't have personal experience with it, but maybe dm-ioband is
something that you might want to look into. See:
http://people.valinux.co.jp/~ryov/dm-ioband/manual/examples.html

In particular,
Example #5: Bandwidth control for Xen blktap devices

If you try this out, please report back to the list.

Can others comment on experiences with dm-ioband?

Cheers,
Todd

-- 
Todd Deshane
http://todddeshane.net
http://runningxen.com

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