.TH "OSDMAPTOOL" "8" "November 18, 2013" "dev" "Ceph"
.SH NAME
osdmaptool \- ceph osd cluster map manipulation tool
.
.nr rst2man-indent-level 0
.
.de1 rstReportMargin
\\$1 \\n[an-margin]
level \\n[rst2man-indent-level]
level margin: \\n[rst2man-indent\\n[rst2man-indent-level]]
-
\\n[rst2man-indent0]
\\n[rst2man-indent1]
\\n[rst2man-indent2]
..
.de1 INDENT
.\" .rstReportMargin pre:
. RS \\$1
. nr rst2man-indent\\n[rst2man-indent-level] \\n[an-margin]
. nr rst2man-indent-level +1
.\" .rstReportMargin post:
..
.de UNINDENT
. RE
.\" indent \\n[an-margin]
.\" old: \\n[rst2man-indent\\n[rst2man-indent-level]]
.nr rst2man-indent-level -1
.\" new: \\n[rst2man-indent\\n[rst2man-indent-level]]
.in \\n[rst2man-indent\\n[rst2man-indent-level]]u
..
.\" Man page generated from reStructuredText.
.
.SH SYNOPSIS
.nf
\fBosdmaptool\fP \fImapfilename\fP [\-\-print] [\-\-createsimple \fInumosd\fP
[\-\-pgbits \fIbitsperosd\fP ] ] [\-\-clobber]
.fi
.sp
.SH DESCRIPTION
.sp
\fBosdmaptool\fP is a utility that lets you create, view, and manipulate
OSD cluster maps from the Ceph distributed file system. Notably, it
lets you extract the embedded CRUSH map or import a new CRUSH map.
.SH OPTIONS
.INDENT 0.0
.TP
.B \-\-print
will simply make the tool print a plaintext dump of the map, after
any modifications are made.
.UNINDENT
.INDENT 0.0
.TP
.B \-\-clobber
will allow osdmaptool to overwrite mapfilename if changes are made.
.UNINDENT
.INDENT 0.0
.TP
.B \-\-import\-crush mapfile
will load the CRUSH map from mapfile and embed it in the OSD map.
.UNINDENT
.INDENT 0.0
.TP
.B \-\-export\-crush mapfile
will extract the CRUSH map from the OSD map and write it to
mapfile.
.UNINDENT
.INDENT 0.0
.TP
.B \-\-createsimple numosd [\-\-pgbits bitsperosd]
will create a relatively generic OSD map with the numosd devices.
If \-\-pgbits is specified, the initial placement group counts will
be set with bitsperosd bits per OSD. That is, the pg_num map
attribute will be set to numosd shifted by bitsperosd.
.UNINDENT
.SH EXAMPLE
.sp
To create a simple map with 16 devices:
.sp
.nf
.ft C
osdmaptool \-\-createsimple 16 osdmap \-\-clobber
.ft P
.fi
.sp
To view the result:
.sp
.nf
.ft C
osdmaptool \-\-print osdmap
.ft P
.fi
.SH AVAILABILITY
.sp
\fBosdmaptool\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),
\fBcrushtool\fP(8),
.SH COPYRIGHT
2010-2013, Inktank Storage, Inc. and contributors. Licensed under Creative Commons BY-SA
.\" Generated by docutils manpage writer.
.