ceph-mds – ceph metadata server daemon¶
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.
- -f, --foreground¶
Foreground: do not daemonize after startup (run in foreground). Do not generate a pid file. Useful when run via ceph-run(8).
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.confto determine monitor addresses during startup.
- -m monaddress[:port]¶
Connect to specified monitor (instead of looking through
- --id/-i ID¶
Set ID portion of the MDS name.
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.