ceph/man/rados.8

.TH "RADOS" "8" "September 27, 2012" "dev" "Ceph"
.SH NAME
rados \- rados object storage utility
.
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.SH SYNOPSIS
.nf
\fBrados\fP [ \-m \fImonaddr\fP ] [ mkpool | rmpool \fIfoo\fP ] [ \-p | \-\-pool
\fIpool\fP ] [ \-s | \-\-snap \fIsnap\fP ] [ \-i \fIinfile\fP ] [ \-o \fIoutfile\fP ]
\fIcommand\fP ...
.fi
.sp
.SH DESCRIPTION
.sp
\fBrados\fP is a utility for interacting with a Ceph object storage
cluster (RADOS), part of the Ceph distributed file system.
.SH OPTIONS
.INDENT 0.0
.TP
.B \-p pool, \-\-pool pool
Interact with the given pool. Required by most commands.
.UNINDENT
.INDENT 0.0
.TP
.B \-s snap, \-\-snap snap
Read from the given pool snapshot. Valid for all pool\-specific read operations.
.UNINDENT
.INDENT 0.0
.TP
.B \-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.
.UNINDENT
.INDENT 0.0
.TP
.B \-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.
.UNINDENT
.INDENT 0.0
.TP
.B \-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.
.UNINDENT
.INDENT 0.0
.TP
.B \-m monaddress[:port]
Connect to specified monitor (instead of looking through ceph.conf).
.UNINDENT
.SH GLOBAL COMMANDS
.INDENT 0.0
.TP
.B \fBlspools\fP
List object pools
.TP
.B \fBdf\fP
Show utilization statistics, including disk usage (bytes) and object
counts, over the entire system and broken down by pool.
.TP
.B \fBmkpool\fP \fIfoo\fP
Create a pool with name foo.
.TP
.B \fBrmpool\fP \fIfoo\fP
Delete the pool foo (and all its data)
.UNINDENT
.SH POOL SPECIFIC COMMANDS
.INDENT 0.0
.TP
.B \fBget\fP \fIname\fP \fIoutfile\fP
Read object name from the cluster and write it to outfile.
.TP
.B \fBput\fP \fIname\fP \fIinfile\fP
Write object name to the cluster with contents from infile.
.TP
.B \fBrm\fP \fIname\fP
Remove object name.
.TP
.B \fBls\fP \fIoutfile\fP
List objects in given pool and write to outfile.
.TP
.B \fBlssnap\fP
List snapshots for given pool.
.TP
.B \fBmksnap\fP \fIfoo\fP
Create pool snapshot named \fIfoo\fP.
.TP
.B \fBrmsnap\fP \fIfoo\fP
Remove pool snapshot names \fIfoo\fP.
.TP
.B \fBbench\fP \fIseconds\fP \fImode\fP [ \-b \fIobjsize\fP ] [ \-t \fIthreads\fP ]
Benchmark for seconds. The mode can be write or read. The default
object size is 4 MB, and the default number of simulated threads
(parallel writes) is 16.
.TP
.B \fBlistomapkeys\fP \fIname\fP
List all the keys stored in the object map of object name.
.TP
.B \fBlistomapvals\fP \fIname\fP
List all key/value pairs stored in the object map of object name.
The values are dumped in hexadecimal.
.TP
.B \fBgetomapval\fP \fIname\fP \fIkey\fP
Dump the hexadecimal value of key in the object map of object name.
.TP
.B \fBsetomapval\fP \fIname\fP \fIkey\fP \fIvalue\fP
Set the value of key in the object map of object name.
.TP
.B \fBrmomapkey\fP \fIname\fP \fIkey\fP
Remove key from the object map of object name.
.TP
.B \fBgetomapheader\fP \fIname\fP
Dump the hexadecimal value of the object map header of object name.
.TP
.B \fBsetomapheader\fP \fIname\fP \fIvalue\fP
Set the value of the object map header of object name.
.UNINDENT
.SH EXAMPLES
.sp
To view cluster utilization:
.sp
.nf
.ft C
rados df
.ft P
.fi
.sp
To get a list object in pool foo sent to stdout:
.sp
.nf
.ft C
rados \-p foo ls \-
.ft P
.fi
.sp
To write an object:
.sp
.nf
.ft C
rados \-p foo put myobject blah.txt
.ft P
.fi
.sp
To create a snapshot:
.sp
.nf
.ft C
rados \-p foo mksnap mysnap
.ft P
.fi
.sp
To delete the object:
.sp
.nf
.ft C
rados \-p foo rm myobject
.ft P
.fi
.sp
To read a previously snapshotted version of an object:
.sp
.nf
.ft C
rados \-p foo \-s mysnap get myobject blah.txt.old
.ft P
.fi
.SH AVAILABILITY
.sp
\fBrados\fP is part of the Ceph distributed file system. Please refer to
the Ceph documentation at \fI\%http://ceph.com/docs\fP for more information.
.SH SEE ALSO
.sp
\fBceph\fP(8)
.SH COPYRIGHT
2012, Inktank Storage, Inc.
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