I want to (or better have to) do Backups of my KVM Virtual Machine images. I have searched for days for a good Backup Soloution. I know amanda is a very good solution. It would be kinf if someone kenn tell me if the following is supported:

1. Trigger the Creation of LVM Snapshot (by invoking a Shell Script that I will write for that purpose)
2. Do a Differential/Delta Backup on my KVM LVM qcow2 sparse file. => I only want to copy the actually changed bits/bytes (=Delta Backup). And it has to support that the file to be backuped up is a sparse file. (Rsync seems to have some kind of problems in regard to this (if the file does not exist yet on the other side... Then it will create a full file, not a sparse file))
3. Release the LVM Snapshot (By invoking a Script that I will write for that purpose)

It's strange, I have nowhere found any documentation about this fact when searching the internet. Zmanda (Commercial Edition) has support vom XEN VM Backup (but not for KVM as far as I can tell)...