Strategy to implement a scalable chat server

Question

I am looking to implement some sort of chat server. And I want it to scale. This seems like a big question, so I guess I expect the answers to be direction pointers, sort of

Answer 1

There's a rather good explanation at the Socket.io site. Have a look at

• http://socket.io/docs/using-multiple-nodes/

It suggests using Nginx as HTTP load balancer, Node.js clustering (with sticky sessions) and Redis as the message backend.

I think your goals should be achievable with little to none coding involved, only using the given modules and configuration mechanisms.