Commit Graph

4 Commits

Author SHA1 Message Date
Thomas Waldmann 12f55f4e9f Merge branch '1.0-maint' 2016-07-06 01:33:53 +02:00
Marian Beermann 0bc0fa22b4
recreate: improve tests, docs, check chunk availability[1]
[1] So if e.g. delete/prune/check are run these can delete the
    recreate_partial_chunks. This is now caught and handled correctly.
2016-04-10 15:59:12 +02:00
Marian Beermann 4b5e6ffa77
Assimilate "borg comment" into "borg recreate" 2016-04-10 14:09:09 +02:00
Marian Beermann a3ee9d2c5f borg recreate: Re-create existing archives.
Use with caution: permanent data loss by specifying incorrect patterns
is easily possible. Make a dry run to make sure you got everything right.

borg recreate has many uses:
- Can selectively remove files/dirs from old archives, e.g. to free
  space or purging picturarum biggus dickus from history
- Recompress data
- Rechunkify data, to have upgraded Attic / Borg 0.xx archives deduplicate
  with Borg 1.x archives. (Or to experiment with chunker-params for
  specific use cases

It is interrupt- and resumable.

Chunks are not freed on-the-fly.
Rationale:
  Makes only sense when rechunkifying, but logic on which new chunks to
  free what input chunks is complicated and *very* delicate.

Future TODOs:
- Refactor tests using py.test fixtures
  -- would require porting ArchiverTestCase to py.test: many changes,
     this changeset is already borderline too large.
- Possibly add a --target option to not replace the source archive
  -- with the target possibly in another Repo
     (better than "cp" due to full integrity checking, and deduplication
      at the target)
- Detect and skip (unless --always-recompress) already recompressed chunks

Fixes #787 #686 #630 #70 (and probably some I overlooked)
Also see #757 and #770
2016-04-10 13:54:44 +02:00