Prune Simulator issue

[dgood]

I think the Prune Simulator is not showing how the pruning will actually work over time, but only if it was pruning your backups for the very first time.

For example, if I set it with a daily backup job and set keep-daily=14, keep-weekly=4 and keep-monthly=12 and an end-date of today (2025-02-21) it will show keeping monthly backups on the last day of each month. But it also shows deleting the daily backup on 2025-01-31, so it won't be there to become the monthly backup for January. Instead, the last weekly for January (2025-01-26) will end up becoming the monthly backup.

Because of this, the simulator should be showing all of the monthly backups being the last Sunday of the month rather than the last day of the month since this is what will end up being the case over time.

 

[fiona]

Hi,
yes, the prune simulator only shows what a single prune run would do given backups from a fixed schedule. To simulate what you suggest would require adding a prune schedule as well. This edge case is only for weeks/months because they are not aligned. You can actually see the behavior when you play around with the keep-weekly setting IMHO, it's a bit out of scope for the simulator, but if you want you can create an enhancement request on the bug tracker: https://bugzilla.proxmox.com/