mirror of
https://github.com/ceph/ceph
synced 2024-12-22 03:22:00 +00:00
189 lines
4.9 KiB
ReStructuredText
189 lines
4.9 KiB
ReStructuredText
:orphan:
|
|
|
|
=======================================
|
|
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 storage 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).
|
|
|
|
.. option:: -b block_size
|
|
|
|
Set the block size for put/get ops and for write benchmarking.
|
|
|
|
.. option:: --striper
|
|
|
|
Uses the striping API of rados rather than the default one.
|
|
Available for stat, get, put, truncate, rm, ls and all xattr related operation
|
|
|
|
|
|
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* [ *foo* --yes-i-really-really-mean-it ]
|
|
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:`listwatchers` *name*
|
|
List the watchers of object name.
|
|
|
|
:command:`ls` *outfile*
|
|
List objects in given pool and write to outfile.
|
|
|
|
:command:`lssnap`
|
|
List snapshots for given pool.
|
|
|
|
:command:`clonedata` *srcname* *dstname* --object-locator *key*
|
|
Clone object byte data from *srcname* to *dstname*. Both objects must be stored with the locator key *key* (usually either *srcname* or *dstname*). Object attributes and omap keys are not copied or cloned.
|
|
|
|
:command:`mksnap` *foo*
|
|
Create pool snapshot named *foo*.
|
|
|
|
:command:`rmsnap` *foo*
|
|
Remove pool snapshot named *foo*.
|
|
|
|
:command:`bench` *seconds* *mode* [ -b *objsize* ] [ -t *threads* ]
|
|
Benchmark for *seconds*. The mode can be *write*, *seq*, or
|
|
*rand*. *seq* and *rand* are read benchmarks, either
|
|
sequential or random. Before running one of the reading benchmarks,
|
|
run a write benchmark with the *--no-cleanup* option. The default
|
|
object size is 4 MB, and the default number of simulated threads
|
|
(parallel writes) is 16. The *--run-name <label>* option is useful
|
|
for benchmarking a workload test from multiple clients. The *<label>*
|
|
is an arbitrary object name. It is "benchmark_last_metadata" by
|
|
default, and is used as the underlying object name for "read" and
|
|
"write" ops.
|
|
Note: -b *objsize* option is valid only in *write* mode.
|
|
|
|
:command:`cleanup`
|
|
|
|
:command:`listomapkeys` *name*
|
|
List all the keys stored in the object map of object name.
|
|
|
|
:command:`listomapvals` *name*
|
|
List all key/value pairs stored in the object map of object name.
|
|
The values are dumped in hexadecimal.
|
|
|
|
:command:`getomapval` *name* *key*
|
|
Dump the hexadecimal value of key in the object map of object name.
|
|
|
|
:command:`setomapval` *name* *key* *value*
|
|
Set the value of key in the object map of object name.
|
|
|
|
:command:`rmomapkey` *name* *key*
|
|
Remove key from the object map of object name.
|
|
|
|
:command:`getomapheader` *name*
|
|
Dump the hexadecimal value of the object map header of object name.
|
|
|
|
:command:`setomapheader` *name* *value*
|
|
Set the value of the object map header of object name.
|
|
|
|
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 Ceph, a massively scalable, open-source, distributed storage system. Please refer to
|
|
the Ceph documentation at http://ceph.com/docs for more information.
|
|
|
|
|
|
See also
|
|
========
|
|
|
|
:doc:`ceph <ceph>`\(8)
|