Prerequisites: To use the Pub/Sub feature of Redis, subscribers must first subscribe to a channel to receive messages from the publisher. Once a message is sent, if no subscriber subscribes to the channel, the message will be lost. Therefore, before using the Pub/Sub feature, make sure that the subscriber has successfully subscribed to the channel before the publisher sends the message.
l Asynchronous processing: When the publisher sends a message, the subscriber may not receive it immediately due to network latency between them and processing time. The subscriber needs to process the received message asynchronously and consider possible latency.
l Unsubscription: If the messages from a certain channel are not desired, the subscribers should unsubscribe from the channel to reduce unnecessary network overhead and resource consumption. You can run the UNSUBSCRIBE command to unsubscribe from a specific channel or all channels using the PUNSUBSCRIBE command.
l Channel naming conventions: Use meaningful and easily distinguishable names for channels. You can use strings for channel names, but we recommend you follow certain naming conventions to avoid confusion or subscription to an undesired channel by mistake.
l Security: Pub/Sub is a public feature, and any client connected to Redis can subscribe to channels and receive messages. Therefore, be careful when using this feature in sensitive information transmission or security-related scenarios, and take proper security measures, such as authentication and encryption to secure data.