Book Image

Node.js Design Patterns - Third Edition

By : Mario Casciaro, Luciano Mammino
5 (1)
Book Image

Node.js Design Patterns - Third Edition

5 (1)
By: Mario Casciaro, Luciano Mammino

Overview of this book

In this book, we will show you how to implement a series of best practices and design patterns to help you create efficient and robust Node.js applications with ease. We kick off by exploring the basics of Node.js, analyzing its asynchronous event driven architecture and its fundamental design patterns. We then show you how to build asynchronous control flow patterns with callbacks, promises and async/await. Next, we dive into Node.js streams, unveiling their power and showing you how to use them at their full capacity. Following streams is an analysis of different creational, structural, and behavioral design patterns that take full advantage of JavaScript and Node.js. Lastly, the book dives into more advanced concepts such as Universal JavaScript, scalability and messaging patterns to help you build enterprise-grade distributed applications. Throughout the book, you’ll see Node.js in action with the help of several real-life examples leveraging technologies such as LevelDB, Redis, RabbitMQ, ZeroMQ, and many others. They will be used to demonstrate a pattern or technique, but they will also give you a great introduction to the Node.js ecosystem and its set of solutions.
Table of Contents (16 chapters)
14
Other Books You May Enjoy
15
Index

Cloning and load balancing

Traditional, multithreaded web servers are usually only scaled horizontally when the resources assigned to a machine cannot be upgraded any more, or when doing so would involve a higher cost than simply launching another machine.

By using multiple threads, traditional web servers can take advantage of all the processing power of a server, using all the available processors and memory. Conversely, Node.js applications, being single-threaded, are usually scaled much sooner compared to traditional web servers. Even in the context of a single machine, we need to find ways to "scale" an application in order to take advantage of all the available resources.

In Node.js, vertical scaling (adding more resources to a single machine) and horizontal scaling (adding more machines to the infrastructure) are almost equivalent concepts: both, in fact, involve similar techniques to leverage all the available processing power...