NAME¶
osdmaptool - ceph osd cluster map manipulation tool
SYNOPSIS¶
osdmaptool mapfilename [--print] [--createsimple numosd
[--pgbits bitsperosd ] ] [--clobber]
DESCRIPTION¶
osdmaptool is a utility that lets you create, view, and manipulate OSD
cluster maps from the Ceph distributed storage system. Notably, it lets you
extract the embedded CRUSH map or import a new CRUSH map.
OPTIONS¶
- --print
- will simply make the tool print a plaintext dump of the
map, after any modifications are made.
- --clobber
- will allow osdmaptool to overwrite mapfilename if changes
are made.
- --import-crush mapfile
- will load the CRUSH map from mapfile and embed it in the
OSD map.
- --export-crush mapfile
- will extract the CRUSH map from the OSD map and write it to
mapfile.
- --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.
EXAMPLE¶
To create a simple map with 16 devices:
osdmaptool --createsimple 16 osdmap --clobber
To view the result:
osdmaptool --print osdmap
AVAILABILITY¶
osdmaptool 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),
crushtool(8),
COPYRIGHT¶
2010-2014, Inktank Storage, Inc. and contributors. Licensed under Creative
Commons BY-SA