Adam Goryachev wrote:
> Holger Parplies wrote:
>> a) rsync full backups are only minimally more expensive than incrementals in
>>    terms of bandwidth. Still, every file needs to be completely read from 
>> disk
>>    on both sides, so there is a good reason to offer an "incremental" mode as
>>    a speedup.
> 
> BTW, 2 x rsync incrementals of the same level will transfer more data
> than one full + one incremental. So for example, doing 6 incrementals
> followed by a full backup can in fact transfer a lot more data than
> doing 7 full backups.
> 
> eg, if a file changes after the full backup, then each incremental
> backup will re-transfer those changes. While a full will transfer the
> changes but the following full/incremental will not re-transfer those
> changes.
> 
This situation can be avoided by setting IncrLevels to 1, 2, 3, 4, 5, 6

This way each incremental is based on the previous incremental, and not
the previous full.  (Assuming you get a full backup every 7 days).

-Rob
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