mirror of https://github.com/ceph/ceph
76 lines
1.7 KiB
ReStructuredText
76 lines
1.7 KiB
ReStructuredText
======================================================
|
|
osdmaptool -- ceph osd cluster map manipulation tool
|
|
======================================================
|
|
|
|
.. program:: osdmaptool
|
|
|
|
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 file system. Notably, it
|
|
lets you extract the embedded CRUSH map or import a new CRUSH map.
|
|
|
|
|
|
Options
|
|
=======
|
|
|
|
.. option:: --print
|
|
|
|
will simply make the tool print a plaintext dump of the map, after
|
|
any modifications are made.
|
|
|
|
.. option:: --clobber
|
|
|
|
will allow osdmaptool to overwrite mapfilename if changes are made.
|
|
|
|
.. option:: --import-crush mapfile
|
|
|
|
will load the CRUSH map from mapfile and embed it in the OSD map.
|
|
|
|
.. option:: --export-crush mapfile
|
|
|
|
will extract the CRUSH map from the OSD map and write it to
|
|
mapfile.
|
|
|
|
.. option:: --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 file system. Please
|
|
refer to the Ceph documentation at http://ceph.com/docs for more
|
|
information.
|
|
|
|
|
|
See also
|
|
========
|
|
|
|
:doc:`ceph <ceph>`\(8),
|
|
:doc:`crushtool <crushtool>`\(8),
|