[libvirt-users] Transient VM Usage

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. - Using the transient option in the xml file under disk. - Making a qcow2 image and run that. I test the last one but for that i must change my xml file to use the new image. A little bit better explained: i must detach the old disk and attach the new one. So my questions are: - Is the last one stable? - whats your experience with the option transient? - Is the performance when i snapshot the image okay? - Do you had make experience with transient images? Thank you very much P.S. Maybe when you dont understand a sentences ask me. I do my best to explain it better. Jens