Doubt about "forget"

[enboig]

I have 39 snapshots, and docker.toml configured as:

[forget]
groupby = "label"
filter-labels = [
    "full",
]
keep-tags = ["keep","important"]
keep-daily = 10
keep-within-daily = "30 days"
keep-weekly = 6
keep-monthly = 7

when running rustic -P docker forget --dry-run I get:

| 2f832e3c | 2026-02-09 01:41:43 | docker13.munchkin-snapper.ts.net | full  | docker | /fitxers/backups/dump                | keep   | daily        |
|          |                     |                                  |       | sql    | /fitxers/dumps                       |        | within daily |
|          |                     |                                  |       |        | /fitxers/media/Photos                |        |              |
|          |                     |                                  |       |        | /var/lib/lxc/102/rootfs/etc          |        |              |
|          |                     |                                  |       |        | /var/lib/lxc/102/rootfs/root/docker  |        |              |
|          |                     |                                  |       |        | /var/lib/lxc/102/rootfs/root/scripts |        |              |
| c213be3c | 2026-02-06 01:41:49 | docker13.munchkin-snapper.ts.net | full  | docker | /fitxers/backups/dump                | keep   | daily        |
|          |                     |                                  |       | sql    | /fitxers/dumps                       |        | within daily |
|          |                     |                                  |       |        | /fitxers/media/Photos                |        | weekly       |
|          |                     |                                  |       |        | /var/lib/lxc/102/rootfs/etc          |        | monthly      |
|          |                     |                                  |       |        | /var/lib/lxc/102/rootfs/root/docker  |        |              |
|          |                     |                                  |       |        | /var/lib/lxc/102/rootfs/root/scripts |        |              |
[INFO] snapshots for (host [docker13.munchkin-snapper.ts.net], label [full], paths [/fitxers/dumps,/fitxers/media/Photos,/var/lib/lxc/102/rootfs/etc,/var/lib/lxc/102/rootfs/root/docker,/var/lib/lxc/102/rootfs/root/scripts]):
| ID       | Time                | Host                             | Label | Tags   | Paths                                | Action | Reason       |
|----------|---------------------|----------------------------------|-------|--------|--------------------------------------|--------|--------------|
| 2a7bcde2 | 2025-12-25 10:11:47 | docker13.munchkin-snapper.ts.net | full  | docker | /fitxers/dumps                       | keep   | daily        |
|          |                     |                                  |       | sql    | /fitxers/media/Photos                |        | within daily |
|          |                     |                                  |       |        | /var/lib/lxc/102/rootfs/etc          |        | weekly       |
|          |                     |                                  |       |        | /var/lib/lxc/102/rootfs/root/docker  |        | monthly      |
|          |                     |                                  |       |        | /var/lib/lxc/102/rootfs/root/scripts |        |              |
| 0c29af0d | 2025-12-23 11:31:52 | docker13.munchkin-snapper.ts.net | full  | docker | /fitxers/dumps                       | keep   | daily        |
|          |                     |                                  |       | sql    | /fitxers/media/Photos                |        | within daily |
|          |                     |                                  |       |        | /var/lib/lxc/102/rootfs/etc          |        | weekly       |
|          |                     |                                  |       |        | /var/lib/lxc/102/rootfs/root/docker  |        | monthly      |
|          |                     |                                  |       |        | /var/lib/lxc/102/rootfs/root/scripts |        |              |

Why are last ones kept by "daily"? And why aren't my snapshots grouped despite having the same label?

[kapitainsky]

Hard to comment only looking at the snippet provided. Post the full output of your forget command.

[aawsome]

Hi @enboig

About the grouping: Could it be that you mistyped group-by and use groupby instead (Which I guess will be simply ignored)?

About the "daily": You specify to keep 10 daily snapshots per group. There are just 2 daily snapshots, so they are kept by this "daily" policy (and additional by other policies which also apply)

[enboig]

You are right, my problem was group-by. Now it works as expected.

Thanks a lot. It's odd that some invalid options throw an error, but this one gets just ignored.

[aawsome]

HI @enboig I fixed this in #1810. Also reopening this discussion as it may be interesting for others, too.