Scaling up the application!

[SahilAnower]

There should be a proper scalable plan for this application with something similar to the above architecture

• Using Pub/Sub model (Redis) for central store for real-time messages, so that even if number of servers increases to handle load, disconnected users also be able to send each other messages
• Using Kafka + DB, for storing of messages in the long run, kafka because of high concurrency if it occurs in the future.