RADOS(8)

NAME
rados - rados object storage utility

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

-p pool, --pool pool
    Interact with the given pool. Required by most commands.

-s snap, --snap snap
    Read from the given pool snapshot. Valid for all pool-specific read operations.

-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.

-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.

-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.

-m monaddress[:port]
    Connect to specified monitor (instead of looking through ceph.conf).

-b block_size
    Set the block size for put/get ops and for write benchmarking.

--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

lspools
    List object pools

df  Show utilization statistics, including disk usage (bytes) and object counts, over the entire system and broken down by pool.

mkpool foo
    Create a pool with name foo.

rmpool foo [ foo --yes-i-really-really-mean-it ]
    Delete the pool foo (and all its data)

POOL SPECIFIC COMMANDS

get name outfile
    Read object name from the cluster and write it to outfile.

put name infile
    Write object name to the cluster with contents from infile.

rm name
    Remove object name.

listwatchers name
    List the watchers of object name.

ls outfile
    List objects in given pool and write to outfile.

lssnap
    List snapshots for given pool.

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.

mksnap foo
    Create pool snapshot named foo.

rmsnap foo
    Remove pool snapshot named foo.

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.

    cleanup

listomapkeys name
    List all the keys stored in the object map of object name.

listomapvals name
    List all key/value pairs stored in the object map of object name. The values are dumped in hexadecimal.

getomapval name key
    Dump the hexadecimal value of key in the object map of object name.

setomapval name key value
    Set the value of key in the object map of object name.

rmomapkey name key
    Remove key from the object map of object name.

getomapheader name
    Dump the hexadecimal value of the object map header of object name.

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

ceph(8)

COPYRIGHT
2010-2014, Inktank Storage, Inc. and contributors. Licensed under Creative Commons BY-SA