On Wed, Apr 07, 2010 at 06:04:14PM +0100, Tim O'Donovan wrote:
> I'm deploying a 2-node Pacemaker/DRBD backed Xen cluster to run a
> mixture of Linux PVM and Windows HVM VMs. I have this up and running on
> a pair of development machines, with both automatic and manual failover
> working perfectly. The live migrations work every time for the PVM and
> HVM based VMs.
>
> I've replicated the setup onto a pair of high-end live machines, but the
> live migrations only succeed around 10% of the time for the HVM VMs. PVM
> live migrations complete every time. The configurations on the
> development and live machines are identical in every way, except for the
> physical hardware.
>
<snip>
 
>
>
> Some basic config details:
>
> Xen version: 3.3.0
> Kernel: 2.6.24-27-xen
> dom0 OS: Ubuntu 8.04 64-bit
> domU OS: Windows 2008 64-bit
>
You might want to update to a newer Xen version, and also possibly to a newer 
dom0 kernel version.
Those versions are old, and they have known bugs.
-- Pasi
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