Description of problem:
Would it be possible to take VM snapshots and store them as a chain of separate qcow2 files. Each new snapshot uses as the backing store the previous one.

img1 (rh6.5 install) <-> img2 (install Oracle)
                      |
                      |-> img3 (install web server)

This way a lot of disk space would be saved. All RH systems would reference just the img1. All web servers would reference img3.

Of course we would need to keep track which vm uses which backing store to avoid modifying it or deleting it.

I know it is currently possible to specify a backing store, but that must all be done manually and I don't know what happens if you specify a qcow img that has multiple snapshots.


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