Re: [libvirt-users] Transient VM Usage
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
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