[libvirt-users] Can I move the disk image of the guest while it is running?

[Eric Blake]

On 02/06/2014 08:14 AM, Andrew Martin wrote:
> Eric,
> 
> For scripted live backups, which non-transient technique would you prefer:
> 1. snapshot-create-as followed by blockpull, which results in the original 
> file being left as a standalone copy of the VM from that point in time; it
> can then be copied off to a backup disk once blockpull completes

Slower (because it pulls the entire contents of the original file into
the new file), but likely to succeed.

> 2. snapshot-create-as followed by copying the backing file (since it is now
> read-only) and then using blockcommit to pull the interim changes back into
> the original/backing file (and removing the snapshot file)

Ideal, but not supported until (unreleased) qemu 2.0.

-- 
Eric Blake   eblake redhat com    +1-919-301-3266
Libvirt virtualization library http://libvirt.org

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