Saturn2888 wrote at about 19:40:50 -0700 on Tuesday, April 12, 2011:
 > The BackupPC_copyPcPool script and the tar copy are great for backing up the 
 > pool but both suffer the same fate as dd; there's no method of only 
 > transferring changes of files which destroys available bandwidth and leaves 
 > drives running constantly almost all day long slowing down crucial backups 
 > of machines.

Well the BackupPC_copyPcPool script *does* allow for some savings.
Most importantly, you can straight rsync the pool (without hard links)
since the hard links are handled separately. This limits bandwidth to
just changed pool files (and to the small subset affected by chain
renumbering)

Unfortunately though you do need to run the full crawl of the pc tree
since chain renumbering may end up changing the hard links. (If there
were no chain renumbering then you would only need to delete obsolete)
backup trees and run the script on recent backups).

But if your issue is network bandwidth rather than the time required
to create the hard link list then this script might help you...

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