On 10/09/2013 02:52 PM, Scott Baker wrote: > What version do I need to support live snapshots? I'm seeing: > > virsh snapshot-create-as Test123 snapshot1 "before yum upgrade" > --disk-only --atomic
Non-live internal snapshots have been around for a long time (qemu 0.11? and somewhere in the libvirt 0.8.x timeframe) - but that requires not using the --disk-only option. Live internal snapshots are a future possibility (it looks like qemu 1.7 will be adding 'blockdev-snapshot-internal-sync') - but libvirt will have to be taught to use it, so that won't be any sooner than libvirt 1.1.4, and more likely several months out. External snapshots (ie. using --disk-only) have always been live; and requires 'blockdev-snapshot-sync', introduced in qemu 0.14; --atomic requires 'transaction', introduced in qemu 1.1. External snapshots in libvirt require libvirt 0.9.5 for disk-only, or libvirt 1.0.5 for memory alongside the disk snapshot. Of course, various distros have backported some of these features onto builds that report earlier version numbers, so sometimes you just have to try it and see if it has been backported. -- Eric Blake eblake redhat com +1-919-301-3266 Libvirt virtualization library http://libvirt.org
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