[Borgbackup] question about deduplicated size stats

Thomas Waldmann tw at waldmann-edv.de
Tue Sep 12 08:00:54 EDT 2017


> why the size have changed ?

Because the deduplicated size (== size of all chunks ONLY used by this 1
archive) is relative to the state of the whole repository.

So if you put these files into these archives (nothing else in that
repo, A, B, C have no duplicate chunks):

A     -> archive1
A B   -> archive2
A B C -> archive3

After creating archive2, the new chunks from B will show up as unique
chunks of archive2 (because they are not referenced by archive1).

But after you create archive3, the chunks from B will be referenced
twice (by archive2 and 3), thus they are not uniquely referenced by
archive2 any more.


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