Provided by: ceph-common_14.2.2-0ubuntu3_amd64 bug


       rados - rados object storage utility


       rados [ options ] [ command ]


       rados is a utility for interacting with a Ceph object storage cluster (RADOS), part of the
       Ceph distributed storage 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 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/append ops and for write benchmarking.

              Uses  the  striping  API of rados rather than the default one.  Available for stat,
              stat2, get, put, append, truncate, rm, ls and all xattr related operation


              List object pools

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

       list-inconsistent-pg pool
              List inconsistent PGs in given pool.

       list-inconsistent-obj pgid
              List inconsistent objects in given PG.

       list-inconsistent-snapset pgid
              List inconsistent snapsets in given PG.


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

       put name infile [--offset offset]
              Write  object  name with start offset (default:0) to the cluster with contents from
              infile.  Warning: The put command creates a single  RADOS  object,  sized  just  as
              large  as  your  input  file.  Unless your objects are of reasonable and consistent
              sizes, that is probably not what you want -- consider using RGW/S3, CephFS, or  RBD

       append name infile
              Append 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.
              Note:  write  and seq must be run on the same host otherwise the objects created by
              write will have names that will fail seq.

       cleanup [ --run-name run_name ] [ --prefix prefix ]
              Clean  up  a  previous  benchmark  operation.   Note:  the  default   run-name   is

       listxattr name
              List all extended attributes of an object.

       getxattr name attr
              Dump the extended attribute value of attr of an object.

       setxattr name attr value
              Set the value of attr in the extended attributes of an object.

       rmxattr name attr
              Remove attr from the extended attributes of an object.

       stat name
              Get stat (ie. mtime, size) of given object

       stat2 name
              Get stat (similar to stat, but with high precision time) of given object

       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 [ --omap-key-file file ] name key [ out-file ]
              Dump the hexadecimal value of key in  the  object  map  of  object  name.   If  the
              optional  out-file  argument is not provided, the value will be written to standard

       setomapval [ --omap-key-file file ] name key [ value ]
              Set the value of key in the object map  of  object  name.  If  the  optional  value
              argument is not provided, the value will be read from standard input.

       rmomapkey [ --omap-key-file file ] 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.

       export filename
              Serialize pool contents to a file or standard output.n"

       import [--dry-run] [--no-overwrite] < filename | - >
              Load pool contents from a file or standard input


       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

       To list inconsistent objects in PG 0.6:

          rados list-inconsistent-obj 0.6 --format=json-pretty


       rados  is  part  of  Ceph,  a massively scalable, open-source, distributed storage system.
       Please refer to the Ceph documentation at for more information.




       2010-2019, Inktank  Storage,  Inc.  and  contributors.  Licensed  under  Creative  Commons
       Attribution Share Alike 3.0 (CC-BY-SA-3.0)