On Fri, Sep 11, 2015 at 04:03:20PM +0200, Michal Privoznik wrote:
> On 11.09.2015 11:34, Mcburn wrote:
> > Hey at all,
> >
> > my Name is Jens-Uwe Sperling. Iám a young student in computer science.
> > I want install a VM for testing at home.
> >
> > i had install a VM with virt-install and the default parameters. (Number
> > cpu, mem etc.)
> >
> > After that i install my OS and configure it.
> >
> > Now i want work on this image in a transient way.
> > So i can use the OS with the given config but every change i do from now
> > should not change my image.
> >
> > I found three ways to do that:
> >
> > - Make a snapshot from my image and kill the snapshot after using.
>
> Yes, this will work perfectly.
>
> > - Using the transient option in the xml file under disk.
>
> Wow, I didn't even know we have such element.
>
> > - 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.
Related notes on what Michal is talking about:
http://wiki.libvirt.org/page/Live-disk-backup-with-active-blockcommit#Procedure
> With option #2 you don't have this opportunity. Option #3 is like #1
> except that you're doing the snapshot yourself :)
--
/kashyap
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