rados - rados object storage utility
rados [ -m monaddr ] [ mkpool | rmpool foo] [ -p | --pool pool ] [ -s
| --snap snap ] [ -i infile ] [ -o outfile ] command ...
rados is a utility for interacting with a Ceph object storage cluster
(RADOS), part of the Ceph distributed file system.
-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
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.
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
Connect to specified monitor (instead of looking through
List object pools
df Show utilization statistics, including disk usage (bytes) and
object counts, over the entire system and broken down by pool.
Create a pool with name foo.
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.
Remove object name.
List objects in given pool and write to outfile.
lssnap List snapshots for given pool.
Create pool snapshot named foo.
Remove pool snapshot names foo.
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.
To view cluster utilization:
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
rados is part of the Ceph distributed file system. Please refer to the
Ceph wiki at http://ceph.newdream.net/wiki for more information.