Have you tried "ceph daemon mds.NAME dump snaps" (available since mimic)?

=================
Frank Schilder
AIT Risø Campus
Bygning 109, rum S14

________________________________________
From: Lars Täuber <taeu...@bbaw.de>
Sent: 17 December 2019 12:32:34
To: Stephan Mueller
Cc: ceph-users@ceph.io
Subject: [ceph-users] Re: list CephFS snapshots

Hi Michael,

thanks for your gist.
This is at least a way to do it. But there are many directories in our cluster.
The "find $1 -type d" lasts for about 90 minutes to find all 2.6 million 
directories.

Is there another (faster) way e.g. via mds?

Cheers,
Lars


Mon, 16 Dec 2019 17:03:41 +0000
Stephan Mueller <smuel...@suse.com> ==> "taeu...@bbaw.de" <taeu...@bbaw.de>, 
"ceph-users@ceph.io" <ceph-users@ceph.io> :
> Hi Lars,
>
> > Is there a mean to list all snapshots existing in a (subdir of)
> > Cephfs?
> > I can't use the find dommand to look for the ".snap" dirs.
>
> You can, but you can't search for the '.snap' directories, you have to
> append them to the directory like `find $cephFsDir/.snap` but I it's
> better to use `ls` instead, to list all snapshots.
>
> >
> > I'd like to remove certain (or all) snapshots within a CephFS. But
> > how do I find them?
> >
>
> I just created a gist for you that can do that:
> https://gist.github.com/Devp00l/2473f5953d578f440fc71b3d602a9c23
>
> As you can see in the script, snapshots starting with an underscore are
> filtered out as these directories belong to snapshots that were created
> in upper directories and these underscore snapshots can't be used for
> deletion.
>
> The deletion of a snapshot can be done by calling `rmdir`.
>
> But if you really want to manage CephFS snapshots easily take a look at
> the dashboard, as we have integrated the snapshot and quota management
> by now :)
>
> You can delete multiple snapshots of a directory or just create new
> snapshots on a directory basis easily through the UI.
>
>
> Stephan
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