RE: XP guests sluggish after around 1 week of uptime

jmandawg
2009-01-19T13:00:20Z

> -----Original Message-----
> From: Avi Kivity [mailto:avi@redhat.com]
> Sent: Monday, January 19, 2009 7:46 AM
> To: jmandawg
> Cc: KVM list
> Subject: Re: XP guests sluggish after around 1 week of uptime
>
> (re-add kvm@vger)
>
>
> Software RAID or hardware RAID?
>
> I think the root cause is the RAID here, not kvm.
> Some suggestions:
> - use the raw format directly on top of LVM. That is, use -drive
> file=/dev/volgroup/logvol.
> - if you use the raw format, disable disk caching: -drive
> file=/dev/volgroup/logvol,cache=off
> - try non-RAID5 storage
>
> To migrate your volumes, use
>
> qemu-img convert /path/to/image.qcow -O raw /dev/volgroup/logvol
>
> Be sure to size the volume appropriately (same size as the virtual image).
>
> This seems fine if a bit low. You'll get better numbers sitting
> directly atop LVM.
>
> --
> error compiling committee.c: too many arguments to function

Yes, it is software raid, I will try moving the guest images to one of my
other disks that is not RAIDed on their own LVM volume.

Does the LVM logical volume size need to be equal the guest disk size
exactly?

I will let you know the results.

Thanks again for the help,

-J