mirror of
https://github.com/ceph/ceph
synced 2024-12-12 06:28:31 +00:00
51 lines
1.6 KiB
Groff
51 lines
1.6 KiB
Groff
|
.TH OSDMAPTOOL 8
|
||
|
|
.SH NAME
|
||
|
|
osdmaptool \- ceph osd cluster map manipulation tool
|
||
|
|
.SH SYNOPSIS
|
||
|
|
.B osdmaptool
|
||
|
|
\fImapfilename\fP
|
||
|
|
[\fB\-\-print\fR]
|
||
|
|
[\fB\-\-createsimple \fInumosd\fR [\fB\-\-pgbits \fIbitsperosd\fR]]
|
||
|
|
[\fB\-\-clobber\fR]
|
||
|
|
.SH DESCRIPTION
|
||
|
|
.B osdmaptool
|
||
|
|
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
|
||
|
|
.TP
|
||
|
|
\fB\-\-print\fP
|
||
|
|
will simply make the tool print a plaintext dump of the map, after any modifications are made.
|
||
|
|
.TP
|
||
|
|
\fB\-\-clobber\fP
|
||
|
|
will allow
|
||
|
|
.B osdmaptool
|
||
|
|
to overwrite \fImapfilename\fP if changes are made.
|
||
|
|
.TP
|
||
|
|
\fB\-\-import-crush\fI mapfile\fP
|
||
|
|
will load the CRUSH map from \fImapfile\fP and embed it in the OSD map.
|
||
|
|
.TP
|
||
|
|
\fB\-\-export-crush\fI mapfile\fP
|
||
|
|
will extract the CRUSH map from the OSD map and write it to \fImapfile\fP.
|
||
|
|
.TP
|
||
|
|
\fB\-\-createsimple\fI numosd\fP [\fB\-\-pgbits \fIbitsperosd\fR]
|
||
|
|
will create a relatively generic OSD map with the \fInumosd\fP devices. If \fB\-\-pgbits\fP
|
||
|
|
is specified, the initial placement group counts will be set with \fIbitsperosd\fP bits per OSD.
|
||
|
|
That is, the \fIpg_num\fP map attribute will be set to \fInumosd\fP shifted by \fIbitsperosd\fP.
|
||
|
|
.SH EXAMPLE
|
||
|
|
To create a simple map with 16 devices:
|
||
|
|
.IP
|
||
|
|
osdmaptool --createsimple 16 osdmap --clobber
|
||
|
|
.PP
|
||
|
|
To view the result:
|
||
|
|
.IP
|
||
|
|
osdmaptool --print osdmap
|
||
|
|
.SH AVAILABILITY
|
||
|
|
.B osdmaptool
|
||
|
|
is part of the Ceph distributed file system. Please refer to the Ceph wiki at
|
||
|
|
http://ceph.newdream.net/wiki for more information.
|
||
|
|
.SH SEE ALSO
|
||
|
|
.BR ceph (8),
|
||
|
|
.BR crushtool (8),
|
||
|
|
.BR mkcephfs (8)
|