----- Original Message -----
From: "Eric Blake" <eblake@redhat.com> To: "Andrew Martin" <amartin@xes-inc.com> Cc: "Gergely Horváth" <gergely.horvath@inepex.com>, libvirt-users@redhat.com Sent: Thursday, February 6, 2014 9:31:29 AM Subject: Re: [libvirt-users] Can I move the disk image of the guest while it is running?
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. Is there a faster, non-transient way to do this with the current versions of qemu and libvirt?
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.
Ah, does blockcommit currently only work with offline VMs with qemu 1.x?