Redis

What is Redis pub/sub and when should it be used in products?

The question is about Redis .

Answer:
Redis pub/sub is a messaging pattern where publishers send messages to named channels and subscribers receive all messages published to those channels in real time. It is best suited for real-time event broadcasting - live notifications, chat message distribution, and cache invalidation signals across multiple application instances. Redis pub/sub does not persist messages - subscribers only receive messages published while connected, making it unsuitable for guaranteed message delivery use cases.

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