Re: [Qemu-devel] live migration which includes previos snapshot

[Eric Blake]

On 11/02/2012 09:18 AM, Kuniyasu Suzaki wrote:
>> 1. Make the original image read-only accessible over NFS.
>> 2. Modify QEMU to create two external snapshot files when the VM is
>> paused for migration (during your fork operation):
>>
>> /host-a/original.qcow2
>> /host-a/new.qcow2 (backing file: /host-a/original.qcow2)
>> /host-b/new.qcow2 (backing file: /host-b/original.qcow2)
>>
>> 3. After fork the two VMs will write into their respective new.qcow2
>> files.  original.qcow2 is never modified anymore.
> 
> Does it means nested qcow2?
> Does it allow to use a snapshot image in original.qcow2?
> # I want to share a snapshot image taken by "savevm" on two QEMUs.

This is not yet possible, someone has to step up and write patches to
make it possible.

-- 
Eric Blake   address@hidden    +1-919-301-3266
Libvirt virtualization library http://libvirt.org

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