On 3/1/2010 1:16 PM, anethema wrote:
>
> Thanks that does help.
> One more question..
>
> Since I'm using rsync for all my hosts, the pool supposedly consolidates all
> data even if doing a full backup.
The pool consolidates all identical data, rsync or not.
> Is there then any difference in a full backup or a filled incremental in
> terms of hard drive usage or transfer bandwidth needed? Or does it just
> transfer the difference and then create a full backup with a full backup's
> hard drive space etc.
With rsync, incrementals skip files where the timestamp and length match
your existing copy. Fulls do a block checksum comparison to verify the
data. In either case, only changed data is transferred, but on the
server side a complete new file is constructed from the existing and new
data, then it is added to the pool.
> Also if the data is corrupted on one of the fulls and it is using the pool to
> save space, if it is just consolidating in the pool won't that corrupt all my
> full backups?
Pool matching is done based on the file content, not the name. Backuppc
won't know what you mean by 'corrupted', but if the content is
different, it becomes a different pool entry, not linked to existing
ones with different content.
--
Les Mikesell
[email protected]
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