NAME

       ceph-mds - ceph metadata server daemon

SYNOPSIS

       ceph-mds -i name [[ --hot-standby [rank] ]|[--journal_check rank]]

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.

       If you specify hot-standby or journal-check, you must  either  specify  the  rank  on  the
       command  line, or specify one of the mds_standby_for_[rank|name] parameters in the config.
       The command line specification overrides the config, and  specifying  the  rank  overrides
       specifying the name.

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).

       --journal-check <rank>
              Attempt to replay the journal for MDS <rank>, then exit.

       --hot-standby <rank>
              Start as a hot standby for MDS <rank>.

AVAILABILITY

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