Redis Pub/Sub

Redis Pub/Sub delivers high-speed, asynchronous message distribution between decoupled services using a fire and forget pattern.

This mechanism drives real-time communication through commands like PUBLISH, SUBSCRIBE, and PSUBSCRIBE (pattern matching). It delivers sub-millisecond latency and handles millions of messages per second on standard hardware. Deploy it for live chat, instant notifications, and real-time dashboards where speed outweighs the need for message persistence. Because it does not store data on disk, it maintains a minimal memory footprint while scaling horizontally across Redis clusters.

https://redis.io/docs/latest/develop/interact/pubsub/