[Duplicity-talk] Robustness of incremental backups?

[Olivier Croquette]

Hi all

I am still elaborating my backup strategy, and I was wondering how often I
should do full backups.

The underlying question is: how robust are incremental backups?

Let's say I have the following chain:

  Full 0 (t0)
+ Incr 1 (t0+1w)
+ Incr 2 (t0+2w)
+ Incr 3 (t0+3w)
+ Incr 4 (t0+4w)

What happens if for one reason Incr2 is broken?
Can duplicity recover anything newer than Incr2?
Will I get any warning when trying to do more incremental backups?

I could see the following causes for broken increments:
- bug in duplicity, gpg, rdiff or other
- corruption or deletion of one or several tgz on the server

I guess I could test it live, but I was wondering if duplicity had been designed
to recover from such situations.

Regards
-- 
Olivier