[Borgbackup] question about deduplicated size stats

[Thomas Waldmann]

> It sounds like what Maurice is after is a way to answer: "If all
> archives except this one were not present, what would be the
> deduplicated size of this archive?"

If there is no other archive, there is only inner deduplication, but no
historical inter-archive dedup.

But borg does not compute a separate value for (only) the inner
deduplication inside an archive.

> If correct, I agree that it would be a useful data point, but have no
> idea how complex it would be to generate that information (assuming it
> doesn't already exist somewhere).

It could be computed by reading this archive's metadata and creating a
chunks index just from that.

Not sure if it would not even confuse people more than they already are
when it comes to dedup statistics.


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