Do I have to use redis for socket.io cluster?

[needforspeed]

Hi there,

My goal is to have a nodejs cluster with sticky-session, the idea was from http://socket.io/docs/using-multiple-nodes/#

My use case doesn't require inter node communication. I plan to do a hash on incoming IDs and distribute them to one of the worker. I see the socket.io-redis package from https://github.com/elad/node-cluster-socket.io, but I didn't see why it requires redis.

Can you please let me know the role of redis in the cluster? Can I use a map in the master instead of redis?

Thanks in advance!

[artofspeed]

if u want to broadcast to a room, emit event to a socket that resides on another process, u need redis

[needforspeed]

@artofspeed Thank you for the reply. I don't do broadcast, so I don't think I need redis in my case

[darrachequesne]

Please re-open if necessary.