On Oct 6, 2016, at 4:47 PM, Peter Maydell wrote: > On 6 October 2016 at 12:59, Eric Blake <ebl...@redhat.com> wrote: >> Libvirt also learned that the qemu 'migrate-to-disk' format (used by >> 'savevm' or 'migrate') is NOT self-descriptive - in order to fully and >> safely revert to an earlier state, you HAVE to store the command line >> (or a way to regenerate the command line) that was associated with the >> qemu whose state you saved, along with tracking all hotplugs. Since a >> mere 'savevm' REQUIRES external information to safely be restored, you >> would have to figure out a way to store this additional information >> alongside whatever save files you plan on creating (and please don't >> change the qcow2 file format to become a dumping grounds for this >> additional information). > > Good point. I think this is a fairly strong argument for > keeping the "user friendly" interface to snapshots in the > VM management layer, not QEMU itself.
Another great feature dies... just kidding. Thank you everyone for giving me your feedback.
