On 02/13/2013 12:31 AM, Jamie Fargen wrote: > Eric, > > Following along with your direction I get stuck at virsh blockcopy. I receive an error > "unsupported configuration: block copy is not supported with this QEMU binary." > > As I originally explained this host is running Red Hat EL6.3. > > Is live blockcopy supported in EL6.3? This after discussion from Eric. A small example. Note this was on latest Fedora, though: http://kashyapc.fedorapeople.org/virt/lc-2012/live-backup-with-blockcopy.txt > > Packages: > qemu-kvm-0.12.1.2-2.295.el6_3.2.x86_64 > libvirt-client-0.9.10-21.el6_3.4.x86_64 > > Regards, > Jamie Ian Fargen > > > On Tue, Feb 12, 2013 at 10:12 AM, Eric Blake <eblake@xxxxxxxxxx > <mailto:eblake@xxxxxxxxxx>> wrote: > > On 02/12/2013 06:22 AM, Jamie Fargen wrote: > > Eric- > > [Please don't top-post on technical lists] > > > > > Why wouldn't a 'virsh blockcopy --pivot domain src dest' be sufficient to > > migrate the volumes to a new storage pool? > > It IS sufficient, as part of the sequence I documented here: > > >> > >> # save off the persistent definition for later > >> virsh dumpxml --inactive $dom > $dom.xml > >> # make the guest transient > >> virsh undefine $dom > >> # remind myself which disks need migration > >> virsh domblklist $dom > >> # for each disk (such as "vda"), do a migration > >> virsh blockcopy $dom $disk /path/to/new --wait --verbose --pivot > >> # make the guest persistent again > >> virsh define $dom.xml > > Or maybe I'm misunderstanding your question. Are you asking why > blockcopy doesn't work with a persistent domain? And the answer to that > is because as of at least qemu 1.4, there is no support for remembering > the progress of a block copy across a domain restart; there have been > patches proposed for qemu 1.5 that add a persistent bitmap, and there > are plans to teach libvirt to use this new feature to allow 'virsh > blockcopy' even for a persistent domain, so that you don't have to > juggle through the steps of going to a transient domain just to do the > blockcopy. > > -- > Eric Blake eblake redhat com +1-919-301-3266 <tel:%2B1-919-301-3266> > Libvirt virtualization library http://libvirt.org > > > > > _______________________________________________ > libvirt-users mailing list > libvirt-users@xxxxxxxxxx > https://www.redhat.com/mailman/listinfo/libvirt-users > -- /kashyap _______________________________________________ libvirt-users mailing list libvirt-users@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/libvirt-users
