On 19/01/15 20:41, Michael Still wrote: > Mostly. > > qcow2 can do a copy on write layer, although it can be disabled IIRC. > So if COW is turned on, you get only the delta in the instance > directory when using qcow2. > > Cheers, > Michael > > On Tue, Jan 20, 2015 at 7:40 AM, Dmitry Guryanov > <[email protected]> wrote: >> Hello, >> >> Do I understand correctly, that both Qcow2 and Raw classes in >> libvirt/imagebackend.py can work with images in qcow2 format, but Raw copies >> the whole base image from cache to the instance's dir and Qcow2 only creates >> a delta (and use base image from cache)?
Correct. That Raw class should be renamed to Copy, to clarify/distinguish from CopyOnWrite. BTW there are some notes on these settings at: http://www.pixelbeat.org/docs/openstack_libvirt_images/ Pádraig __________________________________________________________________________ OpenStack Development Mailing List (not for usage questions) Unsubscribe: [email protected]?subject:unsubscribe http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev
