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[DOCS] #2929 – Document how to completely delete data 

Add new FAQ entry that lists two ways how to really delete files from archives.

fixes #2929
This commit is contained in:
Thalian 2020-03-20 21:28:40 +01:00
parent 07c89cd794
commit a08b058fa0
1 changed files with 13 additions and 5 deletions
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18
docs/faq.rst
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@ -335,11 +335,19 @@ also supports the ``--glob-archives`` parameter.
How do I remove files from an existing backup?
----------------------------------------------
Say you now want to remove old logfiles because you changed your
backup policy as described above. The only way to do this is to use
the :ref:`borg_recreate` command to rewrite all archives with a
different ``--exclude`` pattern. See the examples in the
:ref:`borg_recreate` manpage for more information.
A file is only removed from a BorgBackup repository if all archives that contain
the file are deleted and the corresponding data chunks are removed from the
repository There are two ways how to remove files from a repository.
1. Use :ref:`borg_delete` to remove all archives that contain the files. This
will of course delete everything in the archive, not only some files.
2. If you really want to remove only some specific files, you can run the
:ref:`borg_recreate` command to rewrite all archives with a different
``--exclude`` pattern. See the examples in the manpage for more information.
Finally, run :ref:`borg_compact` with the ``--threshold 0`` option to delete the
data chunks from the repository.
Can I safely change the compression level or algorithm?
--------------------------------------------------------