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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 storage 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

Watch mode shows cluster state changes as they occur. For example: 
ceph -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 specific 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 online documentation, at
http://ceph.com/docs/master/rados/operations/control


AVAILABILITY

ceph is part of the Ceph distributed storage system. Please refer to the Ceph documentation at http://ceph.com/docs for more information.

SEE ALSO

ceph(8),

COPYRIGHT

2010-2014, Inktank Storage, Inc. and contributors. Licensed under Creative Commons BY-SA
January 12, 2014 dev