Node.js is inherently single-threaded. While the event loop handles I/O efficiently, CPU-bound tasks can block it. The solution? Microservices.
Horizontal Scaling
By containerizing Node.js apps with Docker and deploying via Kubernetes, we can spin up multiple instances of our service to handle massive load.
Message Queues
Redis or RabbitMQ message brokers decouple services and ensure reliable communication between microservices, even during partial outages.