On 09/20/2013 08:15 AM, Laine Stump wrote: > > This will leave one problem - what to do if someone migrates a guest > with the new non-0 unit# to a host that's still running old libvirt that > ignores unit#. I don't see how to get around this problem without having > knowledge of the source and destination libvirt versions when formatting > the XML to send across, but that is something we've avoided like the > plague. So what do we do for new->old migration?
We use the same hacks we do for other migration issues - if the _MIGRATABLE flag is on during dumpxml, we output the old style (stick it in the unit slot, since that's what older libvirt expected). -- Eric Blake eblake redhat com +1-919-301-3266 Libvirt virtualization library http://libvirt.org
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