A realtime health consultation chatroom platform, over 200k users and concurrent online 20k . It was running on 60$ DO instance, with 30 doctors answering. Bui

A realtime health consultation chatroom platform, over 200k users and concurrent online 20k . It was running on 60$ DO instance, with 30 doctors answering. Built whole realtime tech stack in PyPy+Tornado+RehtinkDB for realtime asynchronous message queuing. We avoided websocket and used eventsource , it was a lot easier and easier to scale.