[Duplicity-talk] how much metadata does duplicity store between runs

[Sitaram Chamarty]

Hello all,

I'm currently unable to install duplicity on my Mandriva system
without jumping through quite a few hoops, so I thought I'd just ask
instead of doing all that to find the answer to my question.

I know that librsync needs only a set of checksums for the old file,
and the full new file.  Since duplicity can work with almost any type
of remote file system, I imagine it is not dependent on something
running "on the other side" to generate those checksums (unlike plain
rsync, for instance).  Therefore I imagine that, when one run is done,
it stores the checksums required for older versions locally, to be
used as inputs for the next run.

Is my understanding correct, and if so how much metadata (as a very
rough fraction of the actual files being backed up) is stored.  Very
approximate numbers or guesses are also fine -- I'm mainly looking to
see if I've understood this at all :-)

Thanks,

Sitaram