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60 lines
3.5 KiB
Markdown
60 lines
3.5 KiB
Markdown
---
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slug: /en/operations/utilities/clickhouse-disks
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sidebar_position: 59
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sidebar_label: clickhouse-disks
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---
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# Clickhouse-disks
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A utility providing filesystem-like operations for ClickHouse disks. It can work in both interactive and not interactive modes.
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## Program-wide options
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* `--config-file, -C` -- path to ClickHouse config, defaults to `/etc/clickhouse-server/config.xml`.
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* `--save-logs` -- Log progress of invoked commands to `/var/log/clickhouse-server/clickhouse-disks.log`.
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* `--log-level` -- What [type](../server-configuration-parameters/settings#server_configuration_parameters-logger) of events to log, defaults to `none`.
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* `--disk` -- what disk to use for `mkdir, move, read, write, remove` commands. Defaults to `default`.
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* `--query, -q` -- single query that can be executed without launching interactive mode
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* `--help, -h` -- print all the options and commands with description
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## Default Disks
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After the launch two disks are initialized. The first one is a disk `local` that is supposed to imitate local file system from which clickhouse-disks utility was launched. The second one is a disk `default` that is mounted to the local filesystem in the directory that can be found in config as a parameter `clickhouse/path` (default value is `/var/lib/clickhouse`).
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## Clickhouse-disks state
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For each disk that was added the utility stores current directory (as in a usual filesystem). User can change current directory and switch between disks.
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State is reflected in a prompt "`disk_name`:`path_name`"
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## Commands
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In these documentation file all mandatory positional arguments are referred as `<parameter>`, named arguments are referred as `[--parameter value]`. All positional parameters could be mentioned as a named parameter with a corresponding name.
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* `cd (change-dir, change_dir) [--disk disk] <path>`
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Change directory to path `path` on disk `disk` (default value is a current disk). No disk switching happens.
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* `copy (cp) [--disk-from disk_1] [--disk-to disk_2] <path-from> <path-to>`.
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Recursively copy data from `path-from` at disk `disk_1` (default value is a current disk (parameter `disk` in a non-interactive mode))
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to `path-to` at disk `disk_2` (default value is a current disk (parameter `disk` in a non-interactive mode)).
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* `current_disk_with_path (current, current_disk, current_path)`
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Print current state in format:
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`Disk: "current_disk" Path: "current path on current disk"`
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* `help [<command>]`
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Print help message about command `command`. If `command` is not specified print information about all commands.
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* `move (mv) <path-from> <path-to>`.
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Move file or directory from `path-from` to `path-to` within current disk.
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* `remove (rm, delete) <path>`.
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Remove `path` recursively on a current disk.
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* `link (ln) <path-from> <path-to>`.
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Create a hardlink from `path-from` to `path-to` on a current disk.
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* `list (ls) [--recursive] <path>`
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List files at `path`s on a current disk. Non-recursive by default.
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* `list-disks (list_disks, ls-disks, ls_disks)`.
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List disks names.
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* `mkdir [--recursive] <path>` on a current disk.
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Create a directory. Non-recursive by default.
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* `read (r) <path-from> [--path-to path]`
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Read a file from `path-from` to `path` (`stdout` if not supplied).
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* `switch-disk [--path path] <disk>`
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Switch to disk `disk` on path `path` (if `path` is not specified default value is a previous path on disk `disk`).
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* `write (w) [--path-from path] <path-to>`.
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Write a file from `path` (`stdin` if `path` is not supplied, input must finish by Ctrl+D) to `path-to`.
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