Re: [Qemu-devel] Are there plans to achieve ram live Snapshot feature?

[Eric Blake]

On 08/09/2013 09:45 AM, Anthony Liguori wrote:
> Chijianchun <address@hidden> 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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