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CEPH(8)				     Ceph			       CEPH(8)

NAME
       ceph - ceph file system control utility

SYNOPSIS
       ceph [ -m monaddr ] [ -w | command ... ]

DESCRIPTION
       ceph is a control utility for communicating with the monitor cluster of
       a running Ceph distributed file system.

       There are three basic modes of operation.

   Interactive mode
       To start in interactive mode, no arguments are necessary. Control-d  or
       'quit' will exit.

   Watch mode
       To  watch  cluster  state  changes in real time, starting in -w (watch)
       mode will print updates to stdout as they occur. For example,  to  keep
       an eye on cluster state, run:

       ceph -C ceph.conf -w

   Command line mode
       Finally,	 to send a single instruction to the monitor cluster (and wait
       for a response), the command can be specified on the command line.

OPTIONS
       -i infile
	      will specify an input file to be passed along as a payload  with
	      the  command  to the monitor cluster. This is only used for spe‐
	      cific monitor commands.

       -o outfile
	      will write any payload returned by the monitor cluster with  its
	      reply  to	 outfile.   Only  specific  monitor commands (e.g. osd
	      getmap) return a payload.

       -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).

EXAMPLES
       To grab a copy of the current OSD map:

       ceph -m 1.2.3.4:6789 osd getmap -o osdmap

       To get a dump of placement group (PG) state:

       ceph pg dump -o pg.txt

MONITOR COMMANDS
       A  more	complete summary of commands understood by the monitor cluster
       can be found in the wiki, at
	  http://ceph.newdream.net/wiki/Monitor_commands

AVAILABILITY
       ceph is part of the Ceph distributed file system. Please refer  to  the
       Ceph wiki at http://ceph.newdream.net/wiki for more information.

SEE ALSO
       ceph(8), mkcephfs(8)

COPYRIGHT
       2011, New Dream Network

dev			      September 22, 2011		       CEPH(8)

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