How to make the socket object global for all workers in a node?

Question

Node.js

I have a socket game. Because of the overload, I want to do optimization and now I'm smoking about clusters. The game requires you to constantly show the current online, users can make emits to other completely random users. But as I read the worker is a new isolated script and the sockets are separated on different ports. How can I calculate the total online and just get the right io.sockets.connected?

Answer 1

As an option, in a common radish for all, store its own online value for each worker, and when displaying online, sum it up over all workers and display it. It is not necessary to update the value in real time after each connection / disconnect (because there is usually no point in knowing the exact online), it is possible even with a frequency of several minutes