Redis dictionary source | ClickHouse Docs

Example of settings:

SOURCE(REDIS(
    host 'localhost'
    port 6379
    storage_type 'simple'
    db_index 0
))

<source>
    <redis>
        <host>localhost</host>
        <port>6379</port>
        <storage_type>simple</storage_type>
        <db_index>0</db_index>
    </redis>
</source>

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.