hard20 pts · first answer countswebsocketsscalability

Chat across many servers

A chat app runs 3 Node.js instances behind a load balancer. Users on different instances do not receive each other's messages. What is the standard fix?

A.Add a pub/sub backplane such as Redis Pub/Sub or NATS so each instance publishes messages and all instances deliver them to their own connected socketsB.Run only one instance foreverC.Make every client poll every instance directlyD.Store messages in each instance memory and copy them with a cron job

Discussion 0

Join free to post in the discussion.

Chat across many servers

Discussion 0

Related questions