> ## Documentation Index
> Fetch the complete documentation index at: https://private-7c7dfe99-mintlify-8c05c8a2.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# Redis dictionary source

> Configure Redis as a dictionary source in ClickHouse.

Example of settings:

<Tabs>
  <Tab title="DDL">
    ```sql theme={null}
    SOURCE(REDIS(
        host 'localhost'
        port 6379
        storage_type 'simple'
        db_index 0
    ))
    ```
  </Tab>

  <Tab title="Configuration file">
    ```xml theme={null}
    <source>
        <redis>
            <host>localhost</host>
            <port>6379</port>
            <storage_type>simple</storage_type>
            <db_index>0</db_index>
        </redis>
    </source>
    ```
  </Tab>
</Tabs>

<br />

Setting fields:

| Setting        | Description                                                                                                                                                                                                                                                                                                                                                                                                                                                                  |
| -------------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| `host`         | The Redis host.                                                                                                                                                                                                                                                                                                                                                                                                                                                              |
| `port`         | The port on the Redis server.                                                                                                                                                                                                                                                                                                                                                                                                                                                |
| `storage_type` | The structure of the internal Redis storage used to work with keys. `simple` uses a flat key-value map and supports simple-key layouts as well as single-column complex-key layouts (such as `complex_key_cache` and `complex_key_direct`). `hash_map` uses a Redis hash and is required for composite complex keys; it expects exactly two key columns. Key columns must be of integer or string type. Ranged layouts are unsupported. Default value is `simple`. Optional. |
| `db_index`     | The specific numeric index of Redis logical database. Default value is `0`. Optional.                                                                                                                                                                                                                                                                                                                                                                                        |