NAME

       ceph-mds - ceph metadata server daemon

SYNOPSIS

       ceph-mds -i <ID> [flags]

DESCRIPTION

       ceph-mds  is  the  metadata  server daemon for the Ceph distributed file system. One or more instances of
       ceph-mds collectively manage the file system namespace, coordinating access to the shared OSD cluster.

       Each ceph-mds daemon instance should have a unique name. The name is used to identify daemon instances in
       the ceph.conf.

       Once the daemon has started, the monitor cluster will normally assign it a logical rank, or put it  in  a
       standby  pool to take over for another daemon that crashes. Some of the specified options can cause other
       behaviors.

OPTIONS

       -f, --foreground
              Foreground: do not daemonize after startup (run in foreground). Do not generate a pid file. Useful
              when run via ceph-run(8).

       -d     Debug mode: like -f, but also send all log output to stderr.

       --setuser userorgid
              Set uid after starting.  If a username is specified, the user record is looked up to get a uid and
              a gid, and the gid is also set as well, unless --setgroup is also specified.

       --setgroup grouporgid
              Set gid after starting.  If a group name is specified the group record is looked up to get a gid.

       -c ceph.conf, --conf=ceph.conf
              Use ceph.conf configuration file instead of the default /etc/ceph/ceph.conf to  determine  monitor
              addresses during startup.

       -m monaddress[:port]
              Connect to specified monitor (instead of looking through ceph.conf).

       --id/-i ID
              Set ID portion of the MDS name. The ID should not start with a numeric digit.

       --name/-n TYPE.ID
              Set the MDS name of the format TYPE.ID. The TYPE is obviously 'mds'.  The ID should not start with
              a numeric digit.

AVAILABILITY

       ceph-mds  is part of Ceph, a massively scalable, open-source, distributed storage system. Please refer to
       the Ceph documentation at https://docs.ceph.com for more information.

SEE ALSO

       ceph(8), ceph-mon(8), ceph-osd(8)

COPYRIGHT

       2010-2014, Inktank Storage, Inc. and contributors. Licensed  under  Creative  Commons  Attribution  Share
       Alike 3.0 (CC-BY-SA-3.0)

dev                                               May 22, 2025                                       CEPH-MDS(8)