On 09/11/2015 08:03 AM, Michal Privoznik wrote:
- Using the transient option in the xml file under disk.
Wow, I didn't even know we have such element.
We added the XML, but (still) have not wired it up to actually work :(
- Making a qcow2 image and run that.
You mean copy the original image and run from that copy?
The first option has advantage, that you can save the progress or drop it if you don't like it. I mean, you'll create a snapshot, and then continue using the guest. As time moves on, you may find out that you actually want the state to be persistent, so you merge the active layer into the base. If not, then just drop it. With option #2 you don't have this opportunity.
With option #2 (if someone ever implements it), I'd assume we'd want to add support for dropping <transient/> at run-time when it is decided that we want to commit to the disk after all; probably through a block-commit operation. -- Eric Blake eblake redhat com +1-919-301-3266 Libvirt virtualization library http://libvirt.org