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digint / btrbk

Tool for creating snapshots and remote backups of btrfs subvolumes
https://digint.ch/btrbk/
GNU General Public License v3.0
1.58k stars 116 forks source link

Double daily backups sometimes... #577

Closed DrTron closed 6 months ago

DrTron commented 6 months ago

All, I'm using btrbk at the end of my "regular" backup scripts to create additional backups on a different btrfs disk. My btrbk.con has preserve_hour_of_day 0 set and btrbk runs once a day around 00:30.

Sometimes, but not always, and not on every backed-up directory, I get duplicate backups for a day:

backup.20231218
backup.20231219
backup.20231219_1
backup.20231220
backup.20231221
backup.20231222
backup.20231223
backup.20231223_1
backup.20231224
backup.20231225
backup.20231225_1

Does the preserve_hour_of_day 0 have anything to do with it because I'm running the backups on the "0" hour?

Thanks!

DrTron commented 6 months ago

In case anyone sees this and has the same problem: I found that btrbk when installed with a package manager creates a systemd file and a systemd timer that runs btrbk daily shortly after midnight. Not sure why I didn't get duplicates every day, but disabling that got rid of the duplicate snapshots/backups.