I suspect that Obnam doesn't cause all of the de-duplicated chunks to get so "entagled" (as bup puts it, in their readme). There are existing discussions about

I suspect that Obnam doesn't cause all of the de-duplicated chunks to get so "entagled" (as bup puts it, in their readme). There are existing discussions about the way bup pruning would have to work: https://groups.google.com/forum/#!searchin/bup-list/prune/bup-list/86j9ovQ-TaI/NOZPfOAu8WkJ https://groups.google.com/forum/#!searchin/bup-list/prune/bu... Sounds like they are actually making progress on it.