Re: backup of backup or alternating backups?

[Dan Ritter <dsr@randomstring.org>]

eben@gmx.us wrote: 
> 
> I use rdiff to do the backups on the "server" (its job is serving video
> content to the TV box over NFS) and ran into that problem, so what I did was
> write a series of scripts that relinked identical files.  It's not perfect,
> I suspect there are still bugs.  It tries to be efficient (by not comparing
> files that can't possibly be the same because they have different sizes, or
> are already linked), but it gets the job done.  Eventually.  Running it
> takes about as long as running the backup in the first place.  But hey,
> we're talking about 1 GiB of filespace which might change by 10-20 MiB
> between backups, so not a big deal.


Possibly of interest: Debian package rdfind:

Description: find duplicate files utility
 rdfind is a program to find duplicate files and optionally list, delete
 them or replace them with symlinks or hard links.  It is a command
 line program written in c++, which has proven to be pretty quick compared
 to its alternatives.

-dsr-