Node.js Cluster With Express.js

Node.js is a JavaScript runtime built on Chrome’s V8 JavaScript engine. Node.js uses an event-driven, non-blocking I/O model that makes it lightweight and efficient. Node.js package ecosystem is the largest ecosystem of open source libraries in the world, Which makes the possibility for rapid prototyping environment. A single instance of Node.js runs in a single thread. To take advantage of multi-core systems, the user will sometimes want to launch a Node.js Cluster processes to handle the load.

What Does Node.js Cluster Do?

Node.js processes runs on a single process, which means it does not take advantage from multi-core systems by default. If you have an 8 core CPU and run a Node.js application on it, will run as single process on single core by wasting the rest of CPU’s. To utilize all CPU core on the system, Node.js offers cluster module that contains a set of functions and properties that help us to create programs that uses all the CPU core.

Node.js cluster module provides a ability for scaling up the applications by splitting a single process into multiple processes or workers, in Node.js terminology. The cluster module allows you to create child processes (workers), which share all the server ports with the main Node process (master).

Integration of Node.js Cluster With Express

Express is a web application framework that provides a robust set of features for web and mobile applications. Now, We are going to integrate Node.js cluster With Express

Documentation of cluster functions and events are explained on the official website you can go through it for the use case of each functions.

What Node.js Cluster Can Do ?

  • Improves the Performance of the Node.Js Application
  • Zero Downtime Server
  • Communication Between Master and Workers Process
  • CPU Utilization

Please leave your valuable comments/suggestions/feedback on below comment box if any.

Thank You !!


SIVA SANKAR, Working as a Software Engineer, Blogging is my hobby. I completed my Bachelors of Engineering (Computer Science Engineering) in Chennai, India. and my Master of Engineering (Embedded System Technologies) in Tamilnadu, India.

4 thoughts on “Node.js Cluster With Express.js

  1. So if in my app I’ve got some data, how would the clusters know to update all when one of them changes data?

Leave a Reply

Your email address will not be published. Required fields are marked *

This site uses Akismet to reduce spam. Learn how your comment data is processed.