> OK. I can see now why this is true. But it seems like one could
> rewrite the backuppc rsync protocol to check the pool for a file with
> same checksum  before syncing. This could give some real speedup on
> long files. This would be possible at least for the cpool where the
> rsync checksums (and full file checksums) are stored at the end of
> each file.

Now this would be quite the feature - and it fits perfecty with the idea 
of smart pooling that BackupPC has. The effects are rather interesting:

- Different incremental levels won't be needed to preserve bandwidth
- Full backups will indirectly use earlier incrementals as reference

Definite whishlist item.

/johan

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