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66 lines
3.3 KiB
Markdown
66 lines
3.3 KiB
Markdown
---
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slug: /en/operations/utilities/clickhouse-keeper-client
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sidebar_label: clickhouse-keeper-client
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---
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# clickhouse-keeper-client
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A client application to interact with clickhouse-keeper by its native protocol.
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## Keys {#clickhouse-keeper-client}
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- `-q QUERY`, `--query=QUERY` — Query to execute. If this parameter is not passed, `clickhouse-keeper-client` will start in interactive mode.
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- `-h HOST`, `--host=HOST` — Server host. Default value: `localhost`.
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- `-p N`, `--port=N` — Server port. Default value: 9181
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- `--connection-timeout=TIMEOUT` — Set connection timeout in seconds. Default value: 10s.
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- `--session-timeout=TIMEOUT` — Set session timeout in seconds. Default value: 10s.
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- `--operation-timeout=TIMEOUT` — Set operation timeout in seconds. Default value: 10s.
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- `--history-file=FILE_PATH` — Set path of history file. Default value: `~/.keeper-client-history`.
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- `--log-level=LEVEL` — Set log level. Default value: `information`.
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- `--no-confirmation` — If set, will not require a confirmation on several commands. Default value `false` for interactive and `true` for query
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- `--help` — Shows the help message.
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## Example {#clickhouse-keeper-client-example}
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```bash
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./clickhouse-keeper-client -h localhost:9181 --connection-timeout 30 --session-timeout 30 --operation-timeout 30
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Connected to ZooKeeper at [::1]:9181 with session_id 137
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/ :) ls
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keeper foo bar
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/ :) cd keeper
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/keeper :) ls
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api_version
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/keeper :) cd api_version
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/keeper/api_version :) ls
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/keeper/api_version :) cd xyz
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Path /keeper/api_version/xyz does not exists
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/keeper/api_version :) cd ../../
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/ :) ls
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keeper foo bar
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/ :) get keeper/api_version
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2
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```
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## Commands {#clickhouse-keeper-client-commands}
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- `ls [path]` -- Lists the nodes for the given path (default: cwd)
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- `cd [path]` -- Changes the working path (default `.`)
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- `exists <path>` -- Returns `1` if node exists, `0` otherwise
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- `set <path> <value> [version]` -- Updates the node's value. Only updates if version matches (default: -1)
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- `create <path> <value> [mode]` -- Creates new node with the set value
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- `touch <path>` -- Creates new node with an empty string as value. Doesn't throw an exception if the node already exists
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- `get <path>` -- Returns the node's value
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- `rm <path> [version]` -- Removes the node only if version matches (default: -1)
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- `rmr <path>` -- Recursively deletes path. Confirmation required
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- `flwc <command>` -- Executes four-letter-word command
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- `help` -- Prints this message
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- `get_direct_children_number [path]` -- Get numbers of direct children nodes under a specific path
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- `get_all_children_number [path]` -- Get all numbers of children nodes under a specific path
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- `get_stat [path]` -- Returns the node's stat (default `.`)
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- `find_super_nodes <threshold> [path]` -- Finds nodes with number of children larger than some threshold for the given path (default `.`)
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- `delete_stale_backups` -- Deletes ClickHouse nodes used for backups that are now inactive
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- `find_big_family [path] [n]` -- Returns the top n nodes with the biggest family in the subtree (default path = `.` and n = 10)
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- `sync <path>` -- Synchronizes node between processes and leader
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- `reconfig <add|remove|set> "<arg>" [version]` -- Reconfigure Keeper cluster. See https://clickhouse.com/docs/en/guides/sre/keeper/clickhouse-keeper#reconfiguration
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