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Improve the documentation for --keep-within

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Move the explanation below the general explanation of the `--keep-*` option
behavior rephrase the last sentence to make it clear that it works like the
other options that were explained in the previous paragraph.

Resolves #7687
This commit is contained in:
Tim Düsterhus 2023-06-30 15:22:24 +02:00
parent f43fcd3bdb
commit a6f452a050
1 changed files with 8 additions and 7 deletions
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13
docs/usage/prune.rst.inc
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@ -139,12 +139,6 @@ from different machines) in one shared repository, use one prune call per
data set that matches only the respective archives using the --match-archives
(-a) option.
The ``--keep-within`` option takes an argument of the form "<int><char>",
where char is "H", "d", "w", "m", "y". For example, ``--keep-within 2d`` means
to keep all archives that were created within the past 48 hours.
"1m" is taken to mean "31d". The archives kept with this option do not
count towards the totals specified by any other options.
A good procedure is to thin out more and more the older your backups get.
As an example, ``--keep-daily 7`` means to keep the latest backup on each day,
up to 7 most recent days with backups (days without backups do not count).
@ -158,6 +152,13 @@ minutely, hourly, daily, weekly, monthly, or yearly rules was not otherwise able
meet its retention target. This enables the first chronological archive to continue
aging until it is replaced by a newer archive that meets the retention criteria.
The ``--keep-within`` option takes an argument of the form "<int><char>",
where char is "H", "d", "w", "m", "y". For example, ``--keep-within 2d`` means
to keep all archives that were created within the past 48 hours.
"1m" is taken to mean "31d". This option is applied before the secondly option
and like the other options any archives kept by this option do not count towards
the later rules.
The ``--keep-last N`` option is doing the same as ``--keep-secondly N`` (and it will
keep the last N archives under the assumption that you do not create more than one
backup archive in the same second).