[Rdiff-backup-bugs] [sr #105376] geometric series feature

[Andrew Ferguson]

Follow-up Comment #1, sr #105376 (project rdiff-backup):

I'm not sure this feature makes sense in the context of rdiff-backup. Here's
why:

Let's say on Day N I have my geometric backup. The contents of my archive
are:
Day N
Day N-2
Day N-4
Day N-8
Day N-16
etc.

Then the next day, Day N+1, I again backup, and again desire my geometric
progression. The contents of my archive would be:
Day N+1
Day (N+1)-2 == Day N-1
Day (N+1)-4 == Day N-3
Day (N+1)-8 == Day N-7
Day (N+1)-16 == Day N-15
etc.

Since rdiff-backup stores *increments* of files (ie, diff files), it would be
impossible to create Day N-15 from Day N-16 with only Day N-8, etc. We don't
have enough information about Day N-15 to reconstruct it.

I believe this kind of setup is simply perpendicular to the design of
rdiff-backup, no?

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