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doc: Describe repository upgrade process

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Michael Eischer 2022-05-07 20:13:52 +02:00
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doc/045_working_with_repos.rst
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@ -298,3 +298,26 @@ a file size value the following command may be used:
$ restic -r /srv/restic-repo check --read-data-subset=50M
$ restic -r /srv/restic-repo check --read-data-subset=10G
Upgrading the repository format version
=======================================
Repositories created using earlier restic versions use an older repository
format version and have to be upgraded to allow using all new features.
Upgrading must be done explicitly as a newer repository version increases the
minimum restic version required to access the repository. For example the
repository format version 2 is only readable using restic 0.14.0 or newer.
Upgrading to repo version 2 is a two step process: first run
``migrate upgrade_repo_v2`` which will check the repository integrity and
then upgrade the repository version. Repository problems must be corrected
before the migration will be possible. After the migration is complete, run
``prune`` to compress the repository metadata. To limit the amount of data
rewritten in at once, you can use the ``prune --max-repack-size size``
parameter, see :ref:`customize-pruning` for more details.
File contents stored in the repository will not be rewritten, data from new
backups will be compressed. Over time more and more of the repository will
be compressed. To speed up this process and compress all not yet compressed
data, you can run ``prune --repack-uncompressed``.

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doc/060_forget.rst
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@ -388,6 +388,8 @@ the specified duration: if ``forget --keep-within 7d`` is run 8 days after the
last good snapshot, then the attacker can still use that opportunity to remove
all legitimate snapshots.
.. _customize-pruning:
Customize pruning
*****************