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8e975ba9fd
The man page did not make it clear that multiple objects could be specified, nor did it describe use of "--force-full". Info displayed about "rm" with `rados --help` was poorly formatted and the wording was adjusted. Signed-off-by: J. Eric Ivancich <ivancich@redhat.com>
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9.9 KiB
ReStructuredText
405 lines
9.9 KiB
ReStructuredText
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=======================================
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rados -- rados object storage utility
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=======================================
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.. program:: rados
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Synopsis
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========
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| **rados** [ *options* ] [ *command* ]
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Description
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===========
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**rados** is a utility for interacting with a Ceph object storage
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cluster (RADOS), part of the Ceph distributed storage system.
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Global Options
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==============
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.. option:: --object-locator object_locator
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Set object_locator for operation.
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.. option:: -p pool, --pool pool
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Interact with the given pool. Required by most commands.
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.. option:: --target-pool pool
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Select target pool by name.
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.. option:: --pgid
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As an alternative to ``--pool``, ``--pgid`` also allow users to specify the
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PG id to which the command will be directed. With this option, certain
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commands like ``ls`` allow users to limit the scope of the command to the given PG.
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.. option:: -N namespace, --namespace namespace
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Specify the rados namespace to use for the object.
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.. option:: --all
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Use with ls to list objects in all namespaces.
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Put in CEPH_ARGS environment variable to make this the default.
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.. option:: --default
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Use with ls to list objects in default namespace.
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Takes precedence over --all in case --all is in environment.
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.. option:: -s snap, --snap snap
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Read from the given pool snapshot. Valid for all pool-specific read operations.
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.. option:: --create
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Create the pool or directory that was specified.
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.. option:: -i infile
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will specify an input file to be passed along as a payload with the
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command to the monitor cluster. This is only used for specific
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monitor commands.
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.. option:: -m monaddress[:port]
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Connect to specified monitor (instead of looking through ceph.conf).
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.. option:: -b block_size
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Set the block size for put/get/append ops and for write benchmarking.
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.. option:: --striper
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Uses the striping API of rados rather than the default one.
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Available for stat, stat2, get, put, append, truncate, rm, ls
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and all xattr related operation.
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.. option:: -O object_size, --object-size object_size
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Set the object size for put/get ops and for write benchmarking.
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.. option:: --max-objects
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Set the max number of objects for write benchmarking.
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.. option:: --lock-cookie locker-cookie
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Will set the lock cookie for acquiring advisory lock (lock get command).
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If the cookie is not empty, this option must be passed to lock break command
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to find the correct lock when releasing lock.
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.. option:: --target-locator
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Use with cp to specify the locator of the new object.
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.. option:: --target-nspace
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Use with cp to specify the namespace of the new object.
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Bench options
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=============
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.. option:: -t N, --concurrent-ios=N
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Set number of concurrent I/O operations.
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.. option:: --show-time
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Prefix output with date/time.
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.. option:: --no-verify
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Do not verify contents of read objects.
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.. option:: --write-object
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Write contents to the objects.
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.. option:: --write-omap
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Write contents to the omap.
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.. option:: --write-xattr
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Write contents to the extended attributes.
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Load gen options
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================
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.. option:: --num-objects
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Total number of objects.
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.. option:: --min-object-size
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Min object size.
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.. option:: --max-object-size
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Max object size.
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.. option:: --min-op-len
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Min io size of operations.
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.. option:: --max-op-len
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Max io size of operations.
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.. option:: --max-ops
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Max number of operations.
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.. option:: --max-backlog
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Max backlog size.
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.. option:: --read-percent
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Percent of operations that are read.
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.. option:: --target-throughput
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Target throughput (in bytes).
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.. option:: --run-length
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Total time (in seconds).
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.. option:: --offset-align
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At what boundary to align random op offsets.
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Cache pools options
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===================
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.. option:: --with-clones
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Include clones when doing flush or evict.
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OMAP options
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============
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.. option:: --omap-key-file file
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Read the omap key from a file.
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Generic options
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===============
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.. option:: -c FILE, --conf FILE
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Read configuration from the given configuration file.
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.. option:: --id ID
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Set ID portion of my name.
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.. option:: -n TYPE.ID, --name TYPE.ID
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Set cephx user name.
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.. option:: --cluster NAME
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Set cluster name (default: ceph).
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.. option:: --setuser USER
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Set uid to user or uid (and gid to user's gid).
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.. option:: --setgroup GROUP
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Set gid to group or gid.
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.. option:: --version
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Show version and quit.
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Global commands
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===============
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:command:`lspools`
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List object pools
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:command:`df`
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Show utilization statistics, including disk usage (bytes) and object
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counts, over the entire system and broken down by pool.
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:command:`list-inconsistent-pg` *pool*
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List inconsistent PGs in given pool.
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:command:`list-inconsistent-obj` *pgid*
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List inconsistent objects in given PG.
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:command:`list-inconsistent-snapset` *pgid*
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List inconsistent snapsets in given PG.
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Pool specific commands
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======================
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:command:`get` *name* *outfile*
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Read object name from the cluster and write it to outfile.
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:command:`put` *name* *infile* [--offset offset]
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Write object name with start offset (default:0) to the cluster with contents from infile.
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**Warning:** The put command creates a single RADOS object, sized just as
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large as your input file. Unless your objects are of reasonable and consistent sizes, that
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is probably not what you want -- consider using RGW/S3, CephFS, or RBD instead.
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:command:`append` *name* *infile*
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Append object name to the cluster with contents from infile.
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:command:`rm` [--force-full] *name* ...
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Remove object(s) with name(s). With ``--force-full`` will remove when cluster is marked full.
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:command:`listwatchers` *name*
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List the watchers of object name.
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:command:`ls` *outfile*
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List objects in the given pool and write to outfile. Instead of ``--pool`` if ``--pgid`` will be specified, ``ls`` will only list the objects in the given PG.
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:command:`lssnap`
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List snapshots for given pool.
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:command:`clonedata` *srcname* *dstname* --object-locator *key*
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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.
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:command:`mksnap` *foo*
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Create pool snapshot named *foo*.
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:command:`rmsnap` *foo*
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Remove pool snapshot named *foo*.
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:command:`bench` *seconds* *mode* [ -b *objsize* ] [ -t *threads* ]
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Benchmark for *seconds*. The mode can be *write*, *seq*, or
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*rand*. *seq* and *rand* are read benchmarks, either
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sequential or random. Before running one of the reading benchmarks,
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run a write benchmark with the *--no-cleanup* option. The default
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object size is 4 MB, and the default number of simulated threads
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(parallel writes) is 16. The *--run-name <label>* option is useful
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for benchmarking a workload test from multiple clients. The *<label>*
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is an arbitrary object name. It is "benchmark_last_metadata" by
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default, and is used as the underlying object name for "read" and
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"write" ops.
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Note: -b *objsize* option is valid only in *write* mode.
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Note: *write* and *seq* must be run on the same host otherwise the
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objects created by *write* will have names that will fail *seq*.
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:command:`cleanup` [ --run-name *run_name* ] [ --prefix *prefix* ]
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Clean up a previous benchmark operation.
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Note: the default run-name is "benchmark_last_metadata"
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:command:`listxattr` *name*
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List all extended attributes of an object.
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:command:`getxattr` *name* *attr*
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Dump the extended attribute value of *attr* of an object.
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:command:`setxattr` *name* *attr* *value*
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Set the value of *attr* in the extended attributes of an object.
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:command:`rmxattr` *name* *attr*
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Remove *attr* from the extended attributes of an object.
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:command:`stat` *name*
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Get stat (ie. mtime, size) of given object
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:command:`stat2` *name*
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Get stat (similar to stat, but with high precision time) of given object
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:command:`listomapkeys` *name*
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List all the keys stored in the object map of object name.
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:command:`listomapvals` *name*
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List all key/value pairs stored in the object map of object name.
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The values are dumped in hexadecimal.
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:command:`getomapval` [ --omap-key-file *file* ] *name* *key* [ *out-file* ]
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Dump the hexadecimal value of key in the object map of object name.
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If the optional *out-file* argument is not provided, the value will be
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written to standard output.
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:command:`setomapval` [ --omap-key-file *file* ] *name* *key* [ *value* ]
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Set the value of key in the object map of object name. If the optional
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*value* argument is not provided, the value will be read from standard
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input.
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:command:`rmomapkey` [ --omap-key-file *file* ] *name* *key*
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Remove key from the object map of object name.
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:command:`getomapheader` *name*
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Dump the hexadecimal value of the object map header of object name.
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:command:`setomapheader` *name* *value*
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Set the value of the object map header of object name.
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:command:`export` *filename*
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Serialize pool contents to a file or standard output.\n"
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:command:`import` [--dry-run] [--no-overwrite] < filename | - >
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Load pool contents from a file or standard input
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Examples
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========
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To view cluster utilization::
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rados df
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To get a list object in pool foo sent to stdout::
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rados -p foo ls -
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To get a list of objects in PG 0.6::
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rados --pgid 0.6 ls
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To write an object::
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rados -p foo put myobject blah.txt
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To create a snapshot::
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rados -p foo mksnap mysnap
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To delete the object::
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rados -p foo rm myobject
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To read a previously snapshotted version of an object::
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rados -p foo -s mysnap get myobject blah.txt.old
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To list inconsistent objects in PG 0.6::
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rados list-inconsistent-obj 0.6 --format=json-pretty
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Availability
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============
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**rados** is part of Ceph, a massively scalable, open-source, distributed storage system. Please refer to
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the Ceph documentation at https://docs.ceph.com for more information.
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See also
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========
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:doc:`ceph <ceph>`\(8)
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