On 08/09/2013 09:45 AM, Anthony Liguori wrote: > Chijianchun <chijianchun@xxxxxxxxxx> writes: > >> Now in KVM, when RAM snapshot, vcpus needs stopped, it is Unfriendly restrictions to users. >> >> Are there plans to achieve ram live Snapshot feature? > > I think you mean a live version of the savevm command. > > You can approximate live migrating to a file, creating an external disk > snapshot, then resuming the guest. And libvirt does just that, since libvirt 1.0.5, for its external RAM snapshots. The vcpu pause is a mere fraction of a second, so it is generally not noticeable as any guest downtime. -- Eric Blake eblake redhat com +1-919-301-3266 Libvirt virtualization library http://libvirt.org
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