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Re: [Qemu-devel] live migration which includes previos snapshot
From: |
Eric Blake |
Subject: |
Re: [Qemu-devel] live migration which includes previos snapshot |
Date: |
Fri, 02 Nov 2012 09:41:28 -0600 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:16.0) Gecko/20121016 Thunderbird/16.0.1 |
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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