How to store users who are online?

Question

Node.js

Hello.

Problem: Need to store/retrieve users who are currently online. Also, there is a database with all registered users.

Question: how to properly store users who are online? Add another field in the database of registered users (current state) and change it to connect/disconnect? Create a separate database for users who are now online and add/remove on connect/disconnect? Or another way?

Answer 1

If not a cluster, then make a separate array. This is a node where you can do statefull services.