On Sat, May 30, 2015 at 02:35:51AM +0000, Boylan, Ross wrote: > Does libvirt support snapshotting when the virtual disk comes from a > vmdk file? >From my quick test (refer below), seems like you can at-least use VMDK as a backing file. > http://wiki.libvirt.org/page/Snapshots#Desired_functionality seems to > say no, since it says "'virsh snapshot', which requires all disk > images to be qcow2". > > OTOH, man virsh, http://libvirt.org/formatsnapshot.html, and > http://libvirt.org/formatdomain.html#elementsDisks seem to indicate > more flexibility, though I see nothing about vmdk. > > If there is support for vmdk, is it just for external snapshots, or do > internal snapshots work? >From my quick test (for offline disks with `qemu-img`), it does seem to work: $ qemu-img create -f vmdk base.vmdk 1G $ qemu-img create -f qcow2 -o \ 'backing_file=./base.vmdk,backing_fmt=vmdk' ./overlay1.qcow2 $ qemu-img info overlay1.qcow2 image: overlay1.qcow2 file format: qcow2 virtual size: 1.0G (1073741824 bytes) disk size: 196K cluster_size: 65536 backing file: ./base.vmdk backing file format: vmdk Format specific information: compat: 1.1 lazy refcounts: false And, as near as I know, internal snapshots are a feature of qcow2 format. > Currently running libvirt 0.9.12, qemu-kvm 1.1.2 (though I could use > vmware workstation), linux kernel 3.2.0. -- /kashyap _______________________________________________ libvirt-users mailing list libvirt-users@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/libvirt-users