Heroku simplifies the infrastructure of web applications. With its architecture, it is possible to create robust, manageable, and scalable applications according to the needs of your business.

This book is focused on how Heroku works with PostgreSQL. It will cover pieces of architecture and how to build applications that benefit from Heroku Postgres. In this first chapter, you will learn about the key concepts of Heroku, how it works, what are the supported versions of PostgreSQL, how to choose the best plan according to your need, and how high availability works. The concepts covered in this chapter are fundamental to understanding the other chapters.

In this chapter, will cover the following topics: