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docs: explain retention time for event allocation policy in more detail 

'when the calendar event' triggers was too vague, it could mean for
the current media-set or the next time. Apart from that, it was not
technically correct all the time, since we take the start time of
the next media set if that exists first.

The idea here is that we begin the retention when the media set is
finished.

Signed-off-by: Dominik Csapak <d.csapak@proxmox.com>
This commit is contained in:
Dominik Csapak 2022-02-28 12:20:07 +01:00 committed by Dietmar Maurer
parent fef61684b4
commit 83b5076dce
1 changed files with 3 additions and 2 deletions
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docs/tape-backup.rst
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@ -519,8 +519,9 @@ a single media pool, so a job only uses tapes from that pool.
This balances between space efficiency and media count.
.. NOTE:: Retention period starts when the calendar event
triggers.
.. NOTE:: Retention period starts on the creation time of the next
media-set or, if that does not exist, when the calendar event
triggers the next time after the current media-set start time.
Additionally, the following events may allocate a new media set: