Re: [rdiff-backup-users] Backup Rotation?

[Charles Duffy]

From my perspective, the ideal approach to keeping older backups at a 
lower density than new ones would be writing code to be able to merge 
reverse-diffs, such that two historical diffs could be replaced with 
only one containing the changes from both -- and excluding the 
intermediate changes from an item which changed multiple times between 
the merged set.

Anything else requires storing extra or redundant information beyond 
what is currently done now.