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|
=======================================
rados -- rados object storage utility
=======================================
.. program:: rados
Synopsis
========
| **rados** [ -m *monaddr* ] [ mkpool | rmpool *foo* ] [ -p | --pool
*pool* ] [ -s | --snap *snap* ] [ -i *infile* ] [ -o *outfile* ]
*command* ...
Description
===========
**rados** is a utility for interacting with a Ceph object storage
cluster (RADOS), part of the Ceph distributed file system.
Options
=======
.. option:: -p pool, --pool pool
Interact with the given pool. Required by most commands.
.. option:: -s snap, --snap snap
Read from the given pool snapshot. Valid for all pool-specific read operations.
.. option:: -i infile
will specify an input file to be passed along as a payload with the
command to the monitor cluster. This is only used for specific
monitor commands.
.. option:: -o outfile
will write any payload returned by the monitor cluster with its
reply to outfile. Only specific monitor commands (e.g. osd getmap)
return a payload.
.. option:: -c ceph.conf, --conf=ceph.conf
Use ceph.conf configuration file instead of the default
/etc/ceph/ceph.conf to determine monitor addresses during startup.
.. option:: -m monaddress[:port]
Connect to specified monitor (instead of looking through ceph.conf).
Global commands
===============
:command:`lspools`
List object pools
:command:`df`
Show utilization statistics, including disk usage (bytes) and object
counts, over the entire system and broken down by pool.
:command:`mkpool` *foo*
Create a pool with name foo.
:command:`rmpool` *foo*
Delete the pool foo (and all its data)
Pool specific commands
======================
:command:`get` *name* *outfile*
Read object name from the cluster and write it to outfile.
:command:`put` *name* *infile*
Write object name to the cluster with contents from infile.
:command:`rm` *name*
Remove object name.
:command:`ls` *outfile*
List objects in given pool and write to outfile.
:command:`lssnap`
List snapshots for given pool.
:command:`mksnap` *foo*
Create pool snapshot named *foo*.
:command:`rmsnap` *foo*
Remove pool snapshot names *foo*.
:command:`bench` *seconds* *mode* [ -b *objsize* ] [ -t *threads* ]
Benchmark for seconds. The mode can be write or read. The default
object size is 4 KB, and the default number of simulated threads
(parallel writes) is 16.
Examples
========
To view cluster utilization::
rados df
To get a list object in pool foo sent to stdout::
rados -p foo ls -
To write an object::
rados -p foo put myobject blah.txt
To create a snapshot::
rados -p foo mksnap mysnap
To delete the object::
rados -p foo rm myobject
To read a previously snapshotted version of an object::
rados -p foo -s mysnap get myobject blah.txt.old
Availability
============
**rados** is part of the Ceph distributed file system. Please refer to
the Ceph wiki at http://ceph.newdream.net/wiki for more information.
See also
========
:doc:`ceph <ceph>`\(8)
|
