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Ensure regular cycling of ZFS snapshots on backup servers to stop running out of space #80

Closed drn05r closed 2 years ago

drn05r commented 2 years ago

Although there is still capacity to remove old style backups to free space on the backup servers for a while yet. We need to look at the cycling of ZFS snapshots so that disk usage on backup servers stays fairly constant.

TimStallard commented 2 years ago

we should be able to just modify how many snapshots we keep - it's set in /opt/sown/backup/backup/config.py - https://github.com/sown/backup/blob/master/backup/config.example.py#L5

I guess the other option is we make it smarter, so it keeps exactly enough snapshots to keep our disk usage at a certain level

one to discuss tomorrow

TimStallard commented 2 years ago

I've reduced our retention of monthly snapshots on backup2 to 12 months (was previously 24), let's see how it goes tonight

drn05r commented 2 years ago

@TimStallard Also updated backup3 to have the schedule a few days later. Both backup servers seem to be keeping a reasonably stable level of disk usage since this change in the 70-75% range.

I think this can be resolved. Although we should keep and eye on this to make sure it does not creep up too much over time.