Re: [libvirt] [RFC] Image Fleecing for Libvirt (BZ 955734, 905125)

On 07/15/2013 03:04 PM, Richard W.M. Jones wrote: > On Mon, Jul 15, 2013 at 05:57:12PM +0800, Fam Zheng wrote: >> Hi all, >> >> QEMU-KVM BZ 955734, and libvirt BZ 905125 are about feature "Read-only >> point-in-time throwaway snapshot". The development is ongoing on >> upstream, which implements the core functionality by QMP command >> drive-backup. I want to demonstrate the HMP/QMP commands here for image >> fleecing tasks (again) and make sure this interface looks ready and >> satisfying from Libvirt point of view. I'm wondering if we can still get something committed in time for the freeze for 1.1.1. At this point, we're close enough to the freeze, and with no patches submitted in libvirt and the qemu design still under discussion, that I'm worried about whether we are rushing things too much to take a new interface this late in a libvirt release cycle, or whether we should wait until after 1.1.1 before attempting to add things. On the other hand, if we can agree on a sane design now (or at least before rc2, if we miss rc1), then we can commit to that design for this libvirt release, and downstream distros can use libvirt 1.1.1 as a starting point for rebases without worrying about so-name compatibility, by signing up to the efforts of backporting actual implementation from future upstream qemu and libvirt releases.