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Peter Wright wrote:
> Okay, in that case I think I've completely and utterly misunderstood
> what a full backup is in backuppc terminology (and the difference to
> an "incremental" backup).
> 
> I may have to resort to reading the documentation and/or the source
> code a little more carefully. Or conduct tests to see what *actually*
> happens on backup runs.
> 
> Thanks for your conscientious efforts in trying to explain. :)

Basically, the first full backup is starting from a blank destination
folder:
rsync -av --ignore-times source:/source dest
A future full is like this where dest contains everything from the
previous full:
rsync -av --ignore-times source:/source dest
Hence, rsync will only transfer (bandwidth) the changed data + new files

An incremental is like this where dest contains everything from the
previous full (or lower level incremental):
rsync -av source:/source dest

At least, that should give you a basic idea. So regardless of
incremental/full, rsync will not be transferring all the data. The real
life difference will be hardly noticeable, however, if you pay for each
MB, then just do all full backups which will give you the bare minimum
amount of traffic.

If your transfer type was smb or tar, then a full backup will transfer
ALL files + contents each time. This is why I figure most people would
use rsync :) Also, most of my backuppc systems are remote from the
machines being backed up.

Regards,
Adam

- --
Adam Goryachev
Website Managers
www.websitemanagers.com.au
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