Node: Scale socket.io / nowjs - scale across different instances

Question

Before starting to write my application I need to know what to do when a single node.js instance (express and (socket.io or nowjs)) isn\'t enough anymore.

You might tell

Answer 1

Another useful link on 'Scaling Socket.IO' https://github.com/dshaw/talks/tree/master/2011-10-jsclub (slides and sample application)