Book Image

Mastering Redis

By : Jeremy Nelson
Book Image

Mastering Redis

By: Jeremy Nelson

Overview of this book

Redis is the most popular, open-source, key value data structure server that provides a wide range of capabilities on which multiple platforms can be be built. Its fast and flexible data structures give your existing applications an edge in the development environment. This book is a practical guide which aims to help you deep dive into the world of Redis data structure to exploit its excellent features. We start our journey by understanding the need of Redis in brief, followed by an explanation of Advanced key management. Next, you will learn about design patterns, best practices for using Redis in DevOps environment and Docker containerization paradigm in detail. After this, you will understand the concept of scaling with Redis cluster and Redis Sentinel , followed by a through explanation of incorporating Redis with NoSQL technologies such as Elasticsearch and MongoDB. At the end of this section, you will be able to develop competent applications using these technologies. You will then explore the message queuing and task management features of Redis and will be able to implement them in your applications. Finally, you will learn how Redis can be used to build real-time data analytic dashboards, for different disparate data streams.
Table of Contents (18 chapters)
Mastering Redis
About the Author
About the Reviewers

Big O notation

As you may already know and fully appreciate, Salvatore Sanfilippo intentionally documents the worst-case algorithmic performance of each Redis command on Redis's website at This focus on an algorithmic measure of performance as a core actionable metric differentiates Redis from the other data storage technologies. A mathematical definition of Big O is that it "symbolically expresses the asymptotic behavior of a given function.2. Within computer science and more pertinent to our understanding of the big O notation within Redis, with this notation and understanding, we can classify the performance of a Redis command by how the commands perform with increasing inputs to the command over time.

Graphing Big O Notation

In the Redis documentation for each command, the time complexity of each Redis command is given in these big O cases:

  • The O(1) case in the big O notation is shorthand for increasing the number of inputs that do not change the time or processing...