NodeJs — Scaling to Millions of Users

Scaling Node.js applications to millions of users involves a combination of horizontal scaling, load balancing, caching, and microservices architecture. Tools like NGINX, Redis, and Kubernetes play crucial roles.

// NGINX Load Balancer example config
http {
  upstream node_servers {
    server 127.0.0.1:3000;
    server 127.0.0.1:3001;
  }
  server {
    listen 80;
    location / {
      proxy_pass http://node_servers;
    }
  }
}