Lacking scalability

[D4vidH4mm3r]

Multiple instances of the chat service running on multiple machines will each have their own set of rooms. So behind a load balancer, clients attempting to join the same room could be segmented arbitrarily into different rooms on seperate servers. This is suboptimal.

One way to change this: Tell some greeting service / load balancer which machines serve which rooms. Then redirect clients to the appropriate machines. This way, each room name would be unique. It would require that the client caches which server to access for some room (to avoid wasting network communication with the redirection). Also, you would not be able to split rooms across servers.