Re: [Xen-users] disk scheduler?

["Dylan Martin" <dmartin@xxxxxxxxxxxx>]

Interesting!  I could just as easily use ionice/CFQ with blktap.  I
should look into that.  dm-ioband looks good for more complex
requirements than mine, but the blktap example is very helpful.

Thanks!

On Mon, Nov 3, 2008 at 4:56 PM, Todd Deshane <deshantm@xxxxxxxxx> wrote:
> 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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