mirror of https://github.com/ceph/ceph
106 lines
2.5 KiB
Groff
106 lines
2.5 KiB
Groff
.TH "OSDMAPTOOL" "8" "September 27, 2012" "dev" "Ceph"
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.SH NAME
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osdmaptool \- ceph osd cluster map manipulation tool
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.\" Man page generated from reStructuredText.
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.
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.SH SYNOPSIS
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.nf
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\fBosdmaptool\fP \fImapfilename\fP [\-\-print] [\-\-createsimple \fInumosd\fP
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[\-\-pgbits \fIbitsperosd\fP ] ] [\-\-clobber]
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.fi
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.sp
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.SH DESCRIPTION
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.sp
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\fBosdmaptool\fP is a utility that lets you create, view, and manipulate
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OSD cluster maps from the Ceph distributed file system. Notably, it
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lets you extract the embedded CRUSH map or import a new CRUSH map.
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.SH OPTIONS
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.INDENT 0.0
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.TP
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.B \-\-print
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will simply make the tool print a plaintext dump of the map, after
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any modifications are made.
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.UNINDENT
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.INDENT 0.0
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.TP
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.B \-\-clobber
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will allow osdmaptool to overwrite mapfilename if changes are made.
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.UNINDENT
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.INDENT 0.0
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.TP
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.B \-\-import\-crush mapfile
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will load the CRUSH map from mapfile and embed it in the OSD map.
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.UNINDENT
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.INDENT 0.0
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.TP
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.B \-\-export\-crush mapfile
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will extract the CRUSH map from the OSD map and write it to
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mapfile.
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.UNINDENT
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.INDENT 0.0
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.TP
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.B \-\-createsimple numosd [\-\-pgbits bitsperosd]
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will create a relatively generic OSD map with the numosd devices.
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If \-\-pgbits is specified, the initial placement group counts will
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be set with bitsperosd bits per OSD. That is, the pg_num map
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attribute will be set to numosd shifted by bitsperosd.
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.UNINDENT
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.SH EXAMPLE
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.sp
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To create a simple map with 16 devices:
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.sp
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.nf
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.ft C
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osdmaptool \-\-createsimple 16 osdmap \-\-clobber
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.ft P
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.fi
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.sp
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To view the result:
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.sp
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.nf
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.ft C
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osdmaptool \-\-print osdmap
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.ft P
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.fi
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.SH AVAILABILITY
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.sp
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\fBosdmaptool\fP is part of the Ceph distributed file system. Please
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refer to the Ceph documentation at \fI\%http://ceph.com/docs\fP for more
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information.
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.SH SEE ALSO
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.sp
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\fBceph\fP(8),
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\fBcrushtool\fP(8),
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\fBmkcephfs\fP(8)
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.SH COPYRIGHT
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2012, Inktank Storage, Inc.
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.\" Generated by docutils manpage writer.
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