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.

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.

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