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77 lines
1.7 KiB
ReStructuredText
77 lines
1.7 KiB
ReStructuredText
======================================================
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osdmaptool -- ceph osd cluster map manipulation tool
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======================================================
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.. program:: osdmaptool
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Synopsis
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========
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| **osdmaptool** *mapfilename* [--print] [--createsimple *numosd*
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[--pgbits *bitsperosd* ] ] [--clobber]
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Description
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===========
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**osdmaptool** 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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Options
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=======
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.. option:: --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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.. option:: --clobber
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will allow osdmaptool to overwrite mapfilename if changes are made.
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.. option:: --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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.. option:: --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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.. option:: --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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Example
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=======
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To create a simple map with 16 devices::
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osdmaptool --createsimple 16 osdmap --clobber
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To view the result::
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osdmaptool --print osdmap
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Availability
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============
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**osdmaptool** is part of the Ceph distributed file system. Please
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refer to the Ceph documentation at http://ceph.com/docs for more
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information.
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See also
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========
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:doc:`ceph <ceph>`\(8),
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:doc:`crushtool <crushtool>`\(8),
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:doc:`mkcephfs <mkcephfs>`\(8)
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