2009-03-10 22:00:46 +00:00
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.TH CMDS 8
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.SH NAME
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cmds \- ceph metadata server daemon
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.SH SYNOPSIS
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.B cmds
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2009-03-11 22:49:17 +00:00
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\fB\- \fIname\fR
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2009-03-11 20:08:33 +00:00
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[ \fB\-\-rank\fI rank\fR ]
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[ \fB\-\-shadow\fI rank\fR ]
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2009-03-10 22:00:46 +00:00
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.SH DESCRIPTION
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.B cmds
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is the metadata server daemon for the Ceph distributed file system.
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One or more instances of \fBcmds\fP collectively manage the file system
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namespace, coordinating access to the shared OSD cluster.
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.PP
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2009-03-11 20:08:33 +00:00
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Each
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.B cmds
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daemon instance should have a unique \fIname\fP. The name is used
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2009-03-11 23:03:05 +00:00
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to identify daemon instances in the \fIceph.conf\fP.
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2009-03-11 20:08:33 +00:00
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.PP
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Once the daemon has started, the monitor cluster will normally assign it
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a logical rank, or put it in a standby pool to take over for another daemon
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that crashes. If a specific rank may be optionally specified on the
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command line, the daemon will be assigned that rank, or will be put in a
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separate standby queue specifically for that rank.
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2009-03-10 22:00:46 +00:00
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.SH OPTIONS
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.TP
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\fB\-\-mds\fI rank\fP
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Start up as (or standby for) the given MDS rank. If not specified, a rank will
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be assigned by the monitor cluster.
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\fB\-\-shadow\fI rank\fP
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Shadow a the given MDS rank. The given MDS log will be replayed, checking for
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recovery errors.
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.TP
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\fB\-D\fP
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Debug mode: do not daemonize after startup (run in foreground) and send log output
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to stdout.
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.TP
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\fB\-f\fP
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do not daemonize after startup (run in foreground), but log to the usual location.
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Useful when run via
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.BR crun (8).
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.TP
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2009-03-11 23:03:05 +00:00
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\fB\-c\fI ceph.conf\fR, \fB\-\-conf=\fIceph.conf\fR
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Use \fIceph.conf\fP configuration file instead of the default \fI/etc/ceph/ceph.conf\fP
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2009-03-10 23:08:00 +00:00
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to determine monitor addresses during startup.
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2009-03-10 23:10:02 +00:00
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.TP
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\fB\-m\fI monaddress[:port]\fR
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2009-03-11 23:03:05 +00:00
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Connect to specified monitor (instead of looking through \fIceph.conf\fR).
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2009-03-10 22:00:46 +00:00
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.SH AVAILABILITY
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.B cmon
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is part of the Ceph distributed file system. Please refer to the Ceph wiki at
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http://ceph.newdream.net/wiki for more information.
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.SH SEE ALSO
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.BR ceph (8),
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.BR cmon (8),
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.BR cosd (8)
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