1CEPH-MDS(8)                          Ceph                          CEPH-MDS(8)
2
3
4

NAME

6       ceph-mds - ceph metadata server daemon
7

SYNOPSIS

9       ceph-mds -i name [ --hot-standby [rank] ]
10
11

DESCRIPTION

13       ceph-mds  is  the  metadata server daemon for the Ceph distributed file
14       system. One or more instances of ceph-mds collectively manage the  file
15       system namespace, coordinating access to the shared OSD cluster.
16
17       Each  ceph-mds  daemon  instance should have a unique name. The name is
18       used to identify daemon instances in the ceph.conf.
19
20       Once the daemon has started, the monitor cluster will  normally  assign
21       it a logical rank, or put it in a standby pool to take over for another
22       daemon that crashes. Some of the  specified  options  can  cause  other
23       behaviors.
24
25       If  you  specify  hot-standby,  you must either specify the rank on the
26       command line, or specify one of the mds_standby_for_[rank|name] parame‐
27       ters  in the config.  The command line specification overrides the con‐
28       fig, and specifying the rank overrides specifying the name.
29

OPTIONS

31       -f, --foreground
32              Foreground: do not daemonize after startup (run in  foreground).
33              Do not generate a pid file. Useful when run via ceph-run(8).
34
35       -d     Debug mode: like -f, but also send all log output to stderr.
36
37       --setuser userorgid
38              Set  uid  after  starting.  If a username is specified, the user
39              record is looked up to get a uid and a gid, and the gid is  also
40              set as well, unless --setgroup is also specified.
41
42       --setgroup grouporgid
43              Set  gid after starting.  If a group name is specified the group
44              record is looked up to get a gid.
45
46       -c ceph.conf, --conf=ceph.conf
47              Use  ceph.conf  configuration  file  instead  of   the   default
48              /etc/ceph/ceph.conf   to   determine  monitor  addresses  during
49              startup.
50
51       -m monaddress[:port]
52              Connect  to  specified  monitor  (instead  of  looking   through
53              ceph.conf).
54
55       --hot-standby <rank>
56              Start as a hot standby for MDS <rank>.
57

AVAILABILITY

59       ceph-mds  is  part of Ceph, a massively scalable, open-source, distrib‐
60       uted  storage  system.  Please  refer  to  the  Ceph  documentation  at
61       http://ceph.com/docs for more information.
62

SEE ALSO

64       ceph(8), ceph-mon(8), ceph-osd(8)
65

67       2010-2014,  Inktank Storage, Inc. and contributors. Licensed under Cre‐
68       ative Commons Attribution Share Alike 3.0 (CC-BY-SA-3.0)
69
70
71
72
73dev                              Apr 14, 2019                      CEPH-MDS(8)
Impressum