Update: looks like the "help" sub-command is not implemented, which would be 
nice to have documentation on-line. The "initiate scrub command" did work 
though:

[root@gnosis ~]# ceph tell mds.con-fs2:0 scrub start / recursive,scrub_mdsdir
{
    "return_code": 0,
    "scrub_tag": "3b5e0bbc-1c8a-4896-bbae-f0b2902f599b",
    "mode": "asynchronous"
}

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

________________________________________
From: Frank Schilder <fr...@dtu.dk>
Sent: Friday, January 10, 2025 1:05 PM
To: ceph-users@ceph.io
Subject: ceph tell throws WARN: the service id you provided does not exist.

Hi all,

following the documentation for initiating a file system scrub (pacific: 
https://docs.ceph.com/en/pacific/cephfs/scrub/), I can't get the syntax with 
"mds.<fsname>" to work:

# ceph tell mds.con-fs2:0 help
WARN: the service id you provided does not exist. service id should be one of 
ceph-09/ceph-10/ceph-23/ceph-16/ceph-24/ceph-08/ceph-17/ceph-12/ceph-13/ceph-15/ceph-11/ceph-14.
target mds.con-fs2:0 doesn't exists, please pass correct target to tell 
command, such as mon.a/osd.1/mds.a/mgr

The file system name is "con-fs2". I can reach the current rank-0 mds though. 
We are on the latest pacific version.

Is this expected or do we need to configure something?

Thanks and best regards,
=================
Frank Schilder
AIT Risø Campus
Bygning 109, rum S14
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