From: Dominik Csapak <d.csapak@proxmox.com>
To: pbs-devel@lists.proxmox.com
Subject: [pbs-devel] [PATCH proxmox-backup v2 2/2] docs: add tape schedule examples
Date: Mon, 28 Feb 2022 12:20:08 +0100 [thread overview]
Message-ID: <20220228112008.3364833-2-d.csapak@proxmox.com> (raw)
In-Reply-To: <20220228112008.3364833-1-d.csapak@proxmox.com>
just a few examples how one could configure tape pools and jobs.
Signed-off-by: Dominik Csapak <d.csapak@proxmox.com>
---
changes from v1:
* clarified how to manually trigger a new media-set in the simplest case
* reworded last example by removing 'rotation' (if a tape is rotated
depends on how many tapes there are in the pool)
docs/tape-backup.rst | 74 ++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 74 insertions(+)
diff --git a/docs/tape-backup.rst b/docs/tape-backup.rst
index ae597d3d..5d4ce444 100644
--- a/docs/tape-backup.rst
+++ b/docs/tape-backup.rst
@@ -979,3 +979,77 @@ This command does the following:
- run drive cleaning operation
- unload the cleaning tape (to slot 3)
+
+Example Setups
+--------------
+
+Here are a few example setups for how to manage media pools and schedules.
+This is not an exhaustive list, and there are many more possible combinations
+of useful settings.
+
+Simple Setup
+~~~~~~~~~~~~
+
+The most simple setup, always continue the media-set and never expire.
+All backups are stored on a single media set and never deleted.
+
+Allocation policy:
+ continue
+
+Retention policy:
+ keep
+
+Such a simple setup has the advantage that it uses not much space, and
+since there is only one media-set, it is easy to manage. On the other hand,
+it is prone to errors. If a single tape fails, all backups that uses chunks
+from that tape will not be restorable. If you want to start a new media-set
+manually, you can set the currently writable media of the set either to
+'full', or set the location to an offsite vault. In that case, a new
+media-set will be created.
+
+Weekday Scheme
+~~~~~~~~~~~~~~
+
+A slightly more complex scheme, where the goal is to have a tape for each
+weekday, e.g. from Monday to Friday. This can be solved by having a seperate
+media pool for each day, so 'Monday', 'Tuesday', etc.
+
+Allocation policy:
+ should be 'mon' for the 'Monday' pool, 'tue' for the Tuesday pool and so on.
+
+Retention policy:
+ overwrite
+
+There should be a (or more) tape-backup jobs for each pool on the correspondig
+weekday. This scheme is still easily managable with one media set per weekday,
+which can even be taken off site easily.
+
+Staggered Pools
+~~~~~~~~~~~~~~~
+
+Alternatively, more complex setups are possible with multiple media pools and
+different allocation and retention policies.
+
+An example would be to have a media pool with weekly allocation:
+
+Allocation policy:
+ mon
+
+Retention policy:
+ 3 weeks
+
+This creates a new media set each week, and expires them after the 4th
+media set.
+
+Then in addition, there could be a yearly pool that only gets allocated
+once a year, but will not be expired (e.g. for long-term archival purposes):
+
+Allocation policy:
+ yearly
+
+Retention policy:
+ keep
+
+In combination with suited prune settings and tape backup schedules, this
+achieves long-term storage of some backups, while keeping the current
+backups on smaller media sets that get expired every 4 weeks.
--
2.30.2
next prev parent reply other threads:[~2022-02-28 11:20 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-02-28 11:20 [pbs-devel] [PATCH proxmox-backup v2 1/2] docs: explain retention time for event allocation policy in more detail Dominik Csapak
2022-02-28 11:20 ` Dominik Csapak [this message]
2022-03-01 11:39 ` [pbs-devel] [PATCH proxmox-backup v2 2/2] docs: add tape schedule examples Thomas Lamprecht
2022-03-01 7:14 ` [pbs-devel] applied: [PATCH proxmox-backup v2 1/2] docs: explain retention time for event allocation policy in more detail Dietmar Maurer
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