Skip to main content
The Redis String sink writes database changes to a Redis instance as key-value pairs using the Redis String data type.
This is the reference for the Redis String sink. See the quickstart for a step-by-step walkthrough or the how-to guide for an explanation of how to use the Redis String sink.

​
Configuration parameters

​
Redis connection

The sink connects to Redis using the following URL format:
Where:
  • rediss:// is used when tls is enabled, otherwise redis://
  • Authentication credentials are included when provided

​
Key format and operations

For each change to the source table, the sink performs the following Redis operations: By default, keys are generated using the format:
For composite primary keys, values are joined with a colon.

​
Routing

You can use a routing function to customize the key used for each message. For example, you can use the record’s id field with your own prefix:

​
Data format

Records are stored as JSON strings. The specific format depends on the transform applied to the data: With no transform, the entire message payload is stored as a JSON object This may not be preferred for most caching use cases. We recommend using a transform to modify the structure and content before storage. If your transform returns a string or binary-coercible value (such as an integer or boolean), the value is stored directly in Redis. Otherwise, Sequin will JSON encode the value before storing it in Redis.

​
Key expiration

When expire_ms is specified, each key is set with an expiration time using Redis’ PX operation during SET. This allows for automatic key cleanup.