Summary: I present a method for transparently auto-creating lvm snapshots on use.
1) The problem
I'm using rsync to transfer a backup area to another computer. The problem is that if the backup area changes during rsync then rsync complains bitterly and returns nasty error codes making me thing it has failed.
2) The normal solution
The "normal" solution (for those who run Linux Logical Volume Manager, that is) is to create a "snapshot"