On Thu, Jun 02, 2016 at 02:32:47PM +0200, Marc-Aurèle Brothier - Exoscale wrote: > > > On 01 Jun 2016, at 15:59, Daniel P. Berrange <berrange@xxxxxxxxxx> wrote: > > > > 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 > > > > That's correct, the disk was copied pretty quickly and I could see > it at the destination growing during those 49 seconds. What would > you do to try to figure out what's going on? Could try turning on debugging for libvirt QEMU driver, so we can see what QMP monitor traffic is going back & forth -might be something we can spot there that isn't visible in the API stats. eg log_filters="1:qemu" in the libvirtd.conf file and restart Regards, Daniel -- |: http://berrange.com -o- http://www.flickr.com/photos/dberrange/ :| |: http://libvirt.org -o- http://virt-manager.org :| |: http://autobuild.org -o- http://search.cpan.org/~danberr/ :| |: http://entangle-photo.org -o- http://live.gnome.org/gtk-vnc :| _______________________________________________ libvirt-users mailing list libvirt-users@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/libvirt-users
