Events

Publish / subscribe - decouples sender and receiver.

SUBSCRIBE channel
UNSUBSCRIBE channel
PUBLISH channel message

Subscribe to multiple channels using P pattern. That said, we can subscribe to all channels, like this PSUBSCRIBE *.

PSUBSCRIBE channel
PUNSUBSCRIBE channel

Keyspace notifications

Keyspace notifications allow us to get notified when:

• All the commands affecting a given key.

• All the keys receiving an LPUSH operation

• All the keys expiring in the database 0.

These notifications are not reliable, once your servers are down and Redis sends the notifications, they are lost forever.