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Re: [Duplicity-talk] how to generate a full backup from incremental back

From: Simon Ruderich
Subject: Re: [Duplicity-talk] how to generate a full backup from incremental backups and how to list files of an incremental backup
Date: Sat, 13 Feb 2010 10:15:20 +0100
User-agent: Mutt/1.5.20 (2010-02-01)

On Wed, Feb 10, 2010 at 05:07:55PM +0100, Jelle de Jong wrote:
> Hello everybody,
> [snip]
> I do have a few question:
> 1) How do I generate a list of the changed/backup files in an
> incremental backup? (I want to know what the incremental backup did)

You could use the --verbosity option, but I'm not sure which
level you need, more than 4 IIRC.

> 2) I have a few set-ups with very minimal upload bandwidth, and I want
> to stay using incremental backups as standard setting without periodic
> full backups. So I want duplicity to clean-up the backup archive every
> month or so, to generate a new full backup from all the incremental
> backups it done in the past. How can I do this? So I don't want to do
> an "--full-if-older-than" but some sort of
> "--merge-incremental-if-older-then" and if possible say to create a
> full backup from increment backup older then 15 days?

From what I know this is not possible (yet). Duplicity works with
"dump" backup targets (only upload/download work) thus making
merges problematic. It would have to download and decrypt the
files and then upload them again, thus still needing a bigger

From my tests backups with 200 or more incremental versions work
fine although they take longer. But if some older backup files
get damaged I'm not sure if the backup can still be recovered. So
a full backup should be done from time to time.

> Thanks in advance,
> Kind regards,
> Jelle de Jong

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