Re: cephfs - max snapshot limit?

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There's a default/hard limit of 50 snaps that's maintained for any dir via
the definition MAX_SNAPS_PER_PATH = 50 in the source file
src/pybind/mgr/snap_schedule/fs/schedule_client.py.
Every time the snapshot names are read for pruning, the last thing done is
to check the length of the list and keep only MAX_SNAPS_PER_PATH and the
rest are pruned.

Jakob Haufe has pointed it out correctly.



On Thu, Apr 27, 2023 at 12:38 PM Tobias Hachmer <t.hachmer@xxxxxx> wrote:

> Hello,
>
> we are running a 3-node ceph cluster with version 17.2.6.
>
> For CephFS snapshots we have configured the following snap schedule with
> retention:
>
> /PATH 2h 72h15d6m
>
> But we observed that max 50 snapshot are preserved. If a new snapshot is
> created the oldest 51st is deleted.
>
> Is there a limit for maximum cephfs snapshots or maybe this is a bug?
>
> I have found the setting "mds_max_snaps_per_dir" which is 100 by default
> but I think this is not related to my problem?
>
> Thanks,
>
> Tobias
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> ceph-users mailing list -- ceph-users@xxxxxxx
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>


-- 
Milind
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