Hi,
I want to keep the last 7 daily backups all the time. And weekly 4 and monthly 7 backups.
This is my config:
–keep-daily 7
–keep-weekly 4
–keep-monthly 7
I will run my backup script every day once for daily backups with forget and prune option. So, Will I have 18 backup files every month?
I am a little bit confused about forget and prune settings.
At the end of February you will have one, perhaps 2 files covering January, a monthly and maybe one weekly, depending on when in February you look at January.
At the end of January though you will not have any monthly, but 7 dailies and 3 or 4 weekly.
Nice looking avatar! Simply add the --dry-run option to your forget command and you’ll see which snapshots restic would keep and not (see restic help forget for more information).
Hi,
Thanks for explantion. I created a table. Can you look at it?
48week 04.12.2021 1st Daily Backup
48week 05.12.2021 2nd Daily Backup
49week 06.12.2021 3rd Daily Backup
49week 07.12.2021 4th Daily Backup
49week 08.12.2021 5th Daily Backup
49week 09.12.2021 6th Daily Backup
49week 10.12.2021 7th Daily Backup
49week 11.12.2021 8th Daily Backup
49week 12.12.2021 9th Daily Backup
50week 13.12.2021 10th Daily Backup
50week 14.12.2021 11th Daily Backup
–keep-daily 3
–keep-weekly 4
–keep-monthly 6
on 4th Daily Backup, will restic delete 1st Daily Backup or keep it because it is weekly?
on 10th Daily Backup, will restic keep 3rd Daily Backup and 2nd Daily Backup because they are weekly?
Thank you. I just started backuping my server so don’t have much backup to test --dry-run option 
It always keeps the youngest snapshot of each period.
restic backup --time is a great way to create fictional snapshots to test forget settings. I just created 30 snapshots to test your settings.
user@host:~$ restic snapshots
repository bc06e9d3 opened successfully, password is correct
ID Time Host Tags Paths
------------------------------------------------------------------
ea9c5e5f 2021-11-01 20:00:00 host.exmaple.com /tmp
3eeb33eb 2021-11-02 20:00:00 host.exmaple.com /tmp
e92be6e1 2021-11-03 20:00:00 host.exmaple.com /tmp
d8ea5c51 2021-11-04 20:00:00 host.exmaple.com /tmp
d3a3d064 2021-11-05 20:00:00 host.exmaple.com /tmp
c5794721 2021-11-06 20:00:00 host.exmaple.com /tmp
ebcb1a5c 2021-11-07 20:00:00 host.exmaple.com /tmp
f885b8af 2021-11-08 20:00:00 host.exmaple.com /tmp
64bcdda6 2021-11-09 20:00:00 host.exmaple.com /tmp
74221d7d 2021-11-10 20:00:00 host.exmaple.com /tmp
211c98da 2021-11-11 20:00:00 host.exmaple.com /tmp
b08661a4 2021-11-12 20:00:00 host.exmaple.com /tmp
29ab8d64 2021-11-13 20:00:00 host.exmaple.com /tmp
7c2e0906 2021-11-14 20:00:00 host.exmaple.com /tmp
9cb15c54 2021-11-15 20:00:00 host.exmaple.com /tmp
73f3dc52 2021-11-16 20:00:00 host.exmaple.com /tmp
7087e831 2021-11-17 20:00:00 host.exmaple.com /tmp
917b5e49 2021-11-18 20:00:00 host.exmaple.com /tmp
51102550 2021-11-19 20:00:00 host.exmaple.com /tmp
0f8414f3 2021-11-20 20:00:00 host.exmaple.com /tmp
dffede33 2021-11-21 20:00:00 host.exmaple.com /tmp
76550419 2021-11-22 20:00:00 host.exmaple.com /tmp
00b05430 2021-11-23 20:00:00 host.exmaple.com /tmp
0820e9d4 2021-11-24 20:00:00 host.exmaple.com /tmp
0f8267d3 2021-11-25 20:00:00 host.exmaple.com /tmp
bfdf114b 2021-11-26 20:00:00 host.exmaple.com /tmp
d0114e7e 2021-11-27 20:00:00 host.exmaple.com /tmp
fd84115f 2021-11-28 20:00:00 host.exmaple.com /tmp
45893df0 2021-11-29 20:00:00 host.exmaple.com /tmp
a03d4786 2021-11-30 20:00:00 host.exmaple.com /tmp
------------------------------------------------------------------
30 snapshots
restic forget --dry-run --keep-daily 7 --keep-weekly 4 --keep-monthly 7
repository bc06e9d3 opened successfully, password is correct
Applying Policy: keep 7 daily, 4 weekly, 7 monthly snapshots
keep 9 snapshots:
ID Time Host Tags Reasons Paths
------------------------------------------------------------------------------------
7c2e0906 2021-11-14 20:00:00 host.exmaple.com weekly snapshot /tmp
dffede33 2021-11-21 20:00:00 host.exmaple.com weekly snapshot /tmp
0820e9d4 2021-11-24 20:00:00 host.exmaple.com daily snapshot /tmp
0f8267d3 2021-11-25 20:00:00 host.exmaple.com daily snapshot /tmp
bfdf114b 2021-11-26 20:00:00 host.exmaple.com daily snapshot /tmp
d0114e7e 2021-11-27 20:00:00 host.exmaple.com daily snapshot /tmp
fd84115f 2021-11-28 20:00:00 host.exmaple.com daily snapshot /tmp
weekly snapshot
45893df0 2021-11-29 20:00:00 host.exmaple.com daily snapshot /tmp
a03d4786 2021-11-30 20:00:00 host.exmaple.com daily snapshot /tmp
weekly snapshot
monthly snapshot
------------------------------------------------------------------------------------
9 snapshots
Thank you for your time. This helped me a lot.
I understand clearly.