Re: [fedora-virt] Disk device performance in F11

[Mark McLoughlin <markmc redhat com>]

Hi Jerry,

On Mon, 2009-06-29 at 11:38 -0600, Jerry James wrote:
> 
> I'm having a problem with a virtual machine created on an F-11 host
> that I didn't have with an F-10 host, and I'm wondering if I've
> misconfigured something or missed a trick somewhere.  I'm doing some
> custom Linux kernel work for my employer, and I'm using a small
> collection of virtual machines to test it.  In the short time I've had
> F-11 on my host machine, I've seen that virtual disk performance is
> noticeably worse than it was with F-10. 

I'm not sure if you noticed in the other thread, but from:

  https://bugzilla.redhat.com/509383

Does running:

  for f in /sys/block/vd*/queue/rotational; do echo 1 > $f; done

inside the guest help?

Cheers,
Mark.