What are the best practices for implementing Pub/Sub in Node.js?

What are the best practices for implementing Pub/Sub in Node.js?

When implementing Pub/Sub in Node.js, consider using a reliable message broker like Redis or RabbitMQ. Also, ensure to handle message acknowledgments properly to avoid message loss.

How do I ensure message delivery in a Pub/Sub system?

To ensure message delivery, implement message acknowledgments and retries. Use durable subscriptions to retain messages for subscribers that are temporarily offline.

Can you explain the difference between push and pull models in Pub/Sub?

In a push model, the message broker sends messages to subscribers automatically, while in a pull model, subscribers request messages from the broker when they're ready to process them.

What are some common pitfalls to avoid in Pub/Sub implementations?

Common pitfalls include not handling message ordering, failing to scale the system properly, and neglecting to monitor message processing times.