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3.3 KiB
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99 lines
3.3 KiB
ReStructuredText
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=====================================================
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ceph-kvstore-tool -- ceph kvstore manipulation tool
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=====================================================
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.. program:: ceph-kvstore-tool
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Synopsis
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========
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| **ceph-kvstore-tool** <leveldb|rocksdb|bluestore-kv> <store path> *command* [args...]
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Description
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===========
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:program:`ceph-kvstore-tool` is a kvstore manipulation tool. It allows users to manipulate
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leveldb/rocksdb's data (like OSD's omap) offline.
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Commands
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========
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:program:`ceph-kvstore-tool` utility uses many commands for debugging purpose
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which are as follows:
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:command:`list [prefix]`
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Print key of all KV pairs stored with the URL encoded prefix.
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:command:`list-crc [prefix]`
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Print CRC of all KV pairs stored with the URL encoded prefix.
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:command:`dump [prefix]`
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Print key and value of all KV pairs stored with the URL encoded prefix.
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:command:`exists <prefix> [key]`
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Check if there is any KV pair stored with the URL encoded prefix. If key
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is also specified, check for the key with the prefix instead.
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:command:`get <prefix> <key> [out <file>]`
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Get the value of the KV pair stored with the URL encoded prefix and key.
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If file is also specified, write the value to the file.
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:command:`crc <prefix> <key>`
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Get the CRC of the KV pair stored with the URL encoded prefix and key.
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:command:`get-size [<prefix> <key>]`
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Get estimated store size or size of value specified by prefix and key.
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:command:`set <prefix> <key> [ver <N>|in <file>]`
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Set the value of the KV pair stored with the URL encoded prefix and key.
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The value could be *version_t* or text.
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:command:`rm <prefix> <key>`
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Remove the KV pair stored with the URL encoded prefix and key.
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:command:`rm-prefix <prefix>`
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Remove all KV pairs stored with the URL encoded prefix.
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:command:`store-copy <path> [num-keys-per-tx]`
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Copy all KV pairs to another directory specified by ``path``.
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[num-keys-per-tx] is the number of KV pairs copied for a transaction.
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:command:`store-crc <path>`
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Store CRC of all KV pairs to a file specified by ``path``.
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:command:`compact`
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Subcommand ``compact`` is used to compact all data of kvstore. It will open
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the database, and trigger a database's compaction. After compaction, some
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disk space may be released.
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:command:`compact-prefix <prefix>`
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Compact all entries specified by the URL encoded prefix.
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:command:`compact-range <prefix> <start> <end>`
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Compact some entries specified by the URL encoded prefix and range.
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:command:`destructive-repair`
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Make a (potentially destructive) effort to recover a corrupted database.
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Note that in the case of rocksdb this may corrupt an otherwise uncorrupted
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database--use this only as a last resort!
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:command:`stats`
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Prints statistics from underlying key-value database. This is only for informative purposes.
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Format and information content may vary between releases. For RocksDB information includes
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compactions stats, performance counters, memory usage and internal RocksDB stats.
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Availability
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============
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**ceph-kvstore-tool** is part of Ceph, a massively scalable, open-source, distributed storage system. Please refer to
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the Ceph documentation at http://ceph.com/docs 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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