NAME

       ceph-kvstore-tool - ceph kvstore manipulation tool

SYNOPSIS

       ceph-kvstore-tool <leveldb|rocksdb|bluestore-kv> <store path> command [args...]

DESCRIPTION

       ceph-kvstore-tool   is  a  kvstore  manipulation  tool.  It  allows  users  to  manipulate
       leveldb/rocksdb's data (like OSD's omap) offline.

COMMANDS

       ceph-kvstore-tool utility uses many commands for debugging purpose which are as follows:

       list [prefix]
              Print key of all KV pairs stored with the URL encoded prefix.

       list-crc [prefix]
              Print CRC of all KV pairs stored with the URL encoded prefix.

       dump [prefix]
              Print key and value of all KV pairs stored with the URL encoded prefix.

       exists <prefix> [key]
              Check if there is any KV pair stored with the URL encoded prefix. If  key  is  also
              specified, check for the key with the prefix instead.

       get <prefix> <key> [out <file>]
              Get  the  value of the KV pair stored with the URL encoded prefix and key.  If file
              is also specified, write the value to the file.

       crc <prefix> <key>
              Get the CRC of the KV pair stored with the URL encoded prefix and key.

       get-size [<prefix> <key>]
              Get estimated store size or size of value specified by prefix and key.

       set <prefix> <key> [ver <N>|in <file>]
              Set the value of the KV pair stored with the URL encoded prefix and key.  The value
              could be version_t or text.

       rm <prefix> <key>
              Remove the KV pair stored with the URL encoded prefix and key.

       rm-prefix <prefix>
              Remove all KV pairs stored with the URL encoded prefix.

       store-copy <path> [num-keys-per-tx]
              Copy all KV pairs to another directory specified by path.  [num-keys-per-tx] is the
              number of KV pairs copied for a transaction.

       store-crc <path>
              Store CRC of all KV pairs to a file specified by path.

       compact
              Subcommand compact is used to compact  all  data  of  kvstore.  It  will  open  the
              database,  and  trigger  a database's compaction. After compaction, some disk space
              may be released.

       compact-prefix <prefix>
              Compact all entries specified by the URL encoded prefix.

       compact-range <prefix> <start> <end>
              Compact some entries specified by the URL encoded prefix and range.

       destructive-repair
              Make a (potentially destructive) effort to recover a corrupted database.  Note that
              in the case of rocksdb this may corrupt an otherwise uncorrupted database--use this
              only as a last resort!

       stats  Prints statistics from underlying key-value database. This is only for  informative
              purposes.   Format  and  information content may vary between releases. For RocksDB
              information includes compactions stats,  performance  counters,  memory  usage  and
              internal RocksDB stats.

       histogram
              Presents key-value sizes distribution statistics from the underlying KV database.

AVAILABILITY

       ceph-kvstore-tool  is part of Ceph, a massively scalable, open-source, distributed storage
       system.  Please  refer  to  the  Ceph  documentation  at  https://docs.ceph.com  for  more
       information.

SEE ALSO

       ceph(8)

COPYRIGHT

       2010-2022,  Inktank  Storage,  Inc.  and  contributors.  Licensed  under  Creative Commons
       Attribution Share Alike 3.0 (CC-BY-SA-3.0)