Re: [libvirt-users] Migration problem - takes 5 minutes to start moving the memory
On Wed, Jun 01, 2016 at 03:55:37PM +0200, Peter Krempa wrote:
On Wed, Jun 01, 2016 at 11:59:29 +0200, Marc-Aurèle Brothier -
Exoscale wrote:
> Hi,
>
> I'm facing a strange issue while doing a migration from an hypervisor to another
one. The migration takes for ever to start moving the memory.
> The VM had no workload what so ever, just a basic ubuntu image. The versions on the
hypervisors are: libvirt 1.2.21, qemu 1.2.3
>
> Command to launche the migration:
> virsh migrate --verbose --live --abort-on-error --tunnelled --p2p --auto-converge
--copy-storage-inc --xml vm-6160.xml 6160
qemu+tls://<destination_hypervisor>/system
>
You are copying storage too. It takes 5 minutes to copy the storage. The
memory migration starts after the storage migration converges.
I don't think that's it - if you look at the logs provided, you can see
that the storage was apparently fully copied after 49 seconds. There was
then 5 minutes where neither the disk or memory processed numbers
increased, before memory copying started. So there's something fishy
going on there, whether just bogus stats reporting by qemu or a genuine
delay/hang somewhere
Regards,
Daniel
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