restic/changelog/unreleased/issue-3918
Michael Eischer 05651d6d4f prune: Correctly count used/duplicate blobs for partially compressed repos
Counting the first occurrence of a duplicate blob as used and counting
all other as duplicates, independent of which instance of the blob is
kept, is only accurate if all copies of the blob have the same size. This
is no longer the case for a repository containing both compressed and
uncompressed blobs.

Thus for duplicated blobs first count all instances as duplicates and
then subtract the actually used instance later on.
2022-10-22 19:24:36 +02:00

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Bugfix: Correct prune statistics for partially compressed repositories
In a partially compressed repository, one data blob can exist both in an
uncompressed and a compressed version. This caused the prune statistics to
become inaccurate and for example report a too high value for the unused size:
> unused size after prune: 16777215.991 TiB
This has been fixed.
https://github.com/restic/restic/issues/3918
https://github.com/restic/restic/pull/3980