1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
|
:orphan:
.. _ceph_mds_man:
=========================================
ceph-mds -- ceph metadata server daemon
=========================================
.. program:: ceph-mds
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
=======
.. option:: -f, --foreground
Foreground: do not daemonize after startup (run in foreground). Do
not generate a pid file. Useful when run via :doc:`ceph-run
<ceph-run>`\(8).
.. option:: -d
Debug mode: like ``-f``, but also send all log output to stderr.
.. option:: --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.
.. option:: --setgroup grouporgid
Set gid after starting. If a group name is specified the group
record is looked up to get a gid.
.. option:: -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.
.. option:: -m monaddress[:port]
Connect to specified monitor (instead of looking through
``ceph.conf``).
.. option:: --id/-i ID
Set ID portion of the MDS name. The ID should not start with a numeric digit.
.. option:: --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.
Availability
============
**ceph-mds** is part of Ceph, a massively scalable, open-source, distributed storage system. Please refer to the Ceph documentation at
https://docs.ceph.com for more information.
See also
========
:doc:`ceph <ceph>`\(8),
:doc:`ceph-mon <ceph-mon>`\(8),
:doc:`ceph-osd <ceph-osd>`\(8)
|
