ceph-mds8
Ceph metadata server daemon
Usage
ceph-mds -i
<ID>
[flags]
Overview
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.confto 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.
Releases
6 releases since Debian 8 (Jessie); the text changed 5 times.
--setgroup since Debian 9 (Stretch);
--setuser since Debian 9 (Stretch).
--hot-standby until Debian 10 (Buster);
--journal-check until Debian 9 (Stretch).