Use rsync's checksums to deduplicate across backups

[Andrea Gelmini]

2011/11/3 Alex Waite <alexqw85 at gmail.com>:
>    Recently I learned that rsync does a checksum of every file
> transferred.  I thought it might be interesting to record the path and
> checksum of each file in a table.  On future backups, the checksum of

I guess you can be interested in these projects:
- lessfs:¹ deduplication and compression via fuse (it's a mature project);
- Bup:² it uses git fs to store backup (young but very powerfull).

Ciao,
Andrea

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¹ http://www.lessfs.com
² https://github.com/apenwarr/bup