Book Image

Akka Cookbook

By : Vivek Mishra, Héctor Veiga Ortiz
Book Image

Akka Cookbook

By: Vivek Mishra, Héctor Veiga Ortiz

Overview of this book

Akka is an open source toolkit that simplifies the construction of distributed and concurrent applications on the JVM. This book will teach you how to develop reactive applications in Scala using the Akka framework. This book will show you how to build concurrent, scalable, and reactive applications in Akka. You will see how to create high performance applications, extend applications, build microservices with Lagom, and more. We will explore Akka's actor model and show you how to incorporate concurrency into your applications. The book puts a special emphasis on performance improvement and how to make an application available for users. We also make a special mention of message routing and construction. By the end of this book, you will be able to create a high-performing Scala application using the Akka framework.
Table of Contents (18 chapters)
Title Page
About the Authors
About the Reviewer
Customer Feedback

Scaling out your application using remote actors

One of the key points of distributed programming is its ability to scale up the performance of your application horizontally. Let's assume a scenario where an actor receives messages to be processed, and this processing takes some time:

Everything works as expected until the rate of messages starts increasing. Then you realize that the bottleneck of your system is your actor, so you decide to create a pool of actors for processing the messages:

This solution works well; however, sooner or later you will notice an increase in CPU and memory usage, as the rate of messages keeps growing. To solve this, you decide to scale your system vertically and run your application in a larger machine with more CPU and memory.

However, at some point, your CPU and RAM would again reach the limit. Then you realize that throwing more hardware is not a long-term solution. Therefore, as an alternate solution, you decide to scale your system horizontally using Akka...