Re: [libvirt] RFC: API additions for enhanced snapshot support

On 06/21/2011 04:30 AM, Daniel P. Berrange wrote: >> Upstream qemu is developing a 'live snapshot' feature, which allows the >> creation of a snapshot without the current downtime of several seconds >> required by the current 'savevm' monitor command, as well as means for >> controlling applications (libvirt) to request that qemu pause I/O to a >> particular disk, then externally perform a snapshot, then tell qemu to >> resume I/O (perhaps on a different file name or fd from the host, but >> with no change to the contents seen by the guest).  Eventually, these >> changes will make it possible for libvirt to create fast snapshots of >> LVM partitions or btrfs files for guest disk images, as well as to > > Actually, IIUC, the QEMU 'live snapshot' feature is only for special > disk formats like qcow2, qed, etc. Does anyone have pointers to the qemu implementation of monitor commands used for live snapshot?