[Openstack] Support for snapshot of LVM backend image
Jim Fehlig
jfehlig at suse.com
Tue Jul 17 02:42:10 UTC 2012
Boris Filippov wrote:
>>> But qemu can also write the vm state outside of the backend image, which
>>> should be usable with all image backends.
>>>
>
> Use that instead managedSave? This should suffice. Save VM state,
> suspend domain - do snapshot - restore VM with previous state?
>
For best results, I think you would need to retain the vm state, which
contains the cache buffers, and use it in conjunction with the
snapshot. Otherwise you only have a crash-consistent snapshot right? I
suppose modern filesystems and databases can cope though.
Regards,
Jim
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