Book Image

Redis 4.x Cookbook

Book Image

Redis 4.x Cookbook

Overview of this book

Redis is considered the world's most popular key-value store database. Its versatility and the wide variety of use cases it enables have made it a popular choice of database for many enterprises. Based on the latest version of Redis, this book provides both step-by-step recipes and relevant the background information required to utilize its features to the fullest. It covers everything from a basic understanding of Redis data types to advanced aspects of Redis high availability, clustering, administration, and troubleshooting. This book will be your great companion to master all aspects of Redis. The book starts off by installing and configuring Redis for you to get started with ease. Moving on, all the data types and features of Redis are introduced in detail. Next, you will learn how to develop applications with Redis in Java, Python, and the Spring Boot web framework. You will also learn replication tasks, which will help you to troubleshoot replication issues. Furthermore, you will learn the steps that need to be undertaken to ensure high availability on your cluster and during production deployment. Toward the end of the book, you will learn the topmost tasks that will help you to troubleshoot your ecosystem efficiently, along with extending Redis by using different modules.
Table of Contents (21 chapters)
Title Page
Packt Upsell
Windows Environment Setup


Redis, as a popular key-value in-memory data store, is gaining more and more attention recently for its high-performance, diversified data types with powerful APIs, high availability, and scalable architecture. It has been successfully ranked at number 9 in the top 10 databases in the DB-Engine Complete Ranking since 2017. Even before that, it had been at the top of the key-value stores ranking provided by DB-Engine for quite a long time. From the early version, 2.x, to the latest version, 4.x, many fantastic features of Redis have been added to help those who want to deliver low-latency services in their business scenarios.

Based on the latest version of Redis 4.x, Redis Cookbook offers you both step-by-step recipes and relevant background information. It covers everything from a basic understanding of Redis data types to advanced aspects of Redis such as high availability, clustering, administration, and troubleshooting.

With the concept of Learning by doing is the best approach in mind, we have spared no effort to deliver the knowledge of Redis through real use cases in writing the recipes in this book. In other words, this book offers out-of-the-box solutions for many common development and maintenance problems. Especially on your personal computer, you will be able to catch the key points of each recipe easily by following the steps in the How to do it section of every recipe. Furthermore, it's not enough for you to know just how to reach your goal with Redis; explanatory notes of the steps you take within a certain task will be provided in the How it works... section. We also offer essential relevant information and necessary explanations of the internal workings of Redis in the There's more... section. The better you understand how Redis works, the more you can make informed decisions regarding the trade-offs that are involved in engineering. Every recipe is structured in this organized way.

Lastly, we do hope this book gives you a better understanding of Redis and enables you to learn more best practices when you use Redis in your environment.

Who this book is for

This book is for developers, architects, and database administrators who want to start using Redis or improve their Redis knowledge. If you want to design high-performant, scalable database solutions using Redis, this book will guide you towards gaining a comprehensive and in-depth understanding with various kinds of practical recipes. DBAs looking for solutions to common problems encountered during their day-to-day tasks while working with Redis will also find this book useful. The book covers all the aspects of using Redis and provides solutions and hints for everyday usage. Some basic understanding of Redis is expected but is not required to get the best out of this book.

What this book covers

Chapter 1Getting Started with Redis, covers the step-by-step installation of a Redis Server and basic operations, including starting and shutting down the Redis Server, connecting to Redis with redis-cli, and getting server information. The Redis Event Model and Redis protocol are also covered at the end of this chapter.

Chapter 2, Data Types, talks about Redis data types and their common operational API commands. All data types that are supported in Redis 4.x (string, list, hash, Set, Sorted Set, HyperLogLog, and Geo) will be covered in this chapter. Basic Redis key management is also discussed.

Chapter 3, Data Features, covers a few useful Redis features that make data manipulation easier. It first shows how to use bitmaps, sort, and setting key expiration. You will then be introduced to three important features of Redis: pipeline, transaction, and PubSub. At the end of this chapter, we will demonstrate how to write and debug Lua scripts in Redis.

Chapter 4, Developing with Redis, demonstrates how to develop applications with Redis. First, it discusses the usage scenario of Redis and the choice of data types and APIs. Then, it shows examples of developing Java and Python applications with the Redis Client libraries, Jedis and redis-py. Lastly, we will cover examples of using Redis in the Spring Framework and writing a MapReduce/Spark job will also be covered.  

Chapter 5Replication, covers the Redis replication mechanism. It shows how to set up a Redis slave and explains how Redis replication works. Then, topics of optimizing and troubleshooting Redis replication will be discussed.

Chapter 6, Persistence, introduces the two persistence options in Redis: RDB and AOF. It shows how to enable RDB and AOF persistence in Redis and explains how things work behind the scenes. It also talks about the difference between RDB and AOF and how to utilize the combination of these two options.

Chapter 7, Setting Up High Availability and Cluster, covers the high availability of Redis. It demonstrates how to set up Redis Sentinels and Redis Clusters. A few experiments will be shown to explain how Redis Sentinel and Cluster work.

Chapter 8,Deploying to a Production Environment, discusses the things to notice when deploying Redis in a production environment. It first talks about the operation system, network, and security concerns. Then, it touches upon the topics of tweaking configuration and logging Redis. Setting up the LRU policy is also included. Lastly, we will look at Redis benchmarking.

Chapter 9, Administrating Redis, covers various Redis administration tasks, including updating server settings, using redis-cli, backing up and restoring data, managing memory usage, managing client, and data migration.

Chapter 10Troubleshooting Redis, provides some practical examples on troubleshooting Redis issues. It covers the usage of slow log to identify slow queries and demonstrate common cases of troubleshooting latency, memory, and crash issues.

Chapter 11, Extending Redis with Redis Module, discusses how to extend the Redis functionality with the Redis Module. It talks about how the Redis module works and then demonstrates how to build Redis Modules with Redis Modules SDK. 

Chapter 12, The Redis Ecosystem, talks about third-party components for Redis. A few popular tools, clients, and proxies are also briefly introduced.

Appendix, Windows Environment Setup, explains how to configure Windows environment for Redis.

To get the most out of this book

All the examples in this book are to be run on Redis 4.x. A Linux environment is preferred, while macOS X is also supported. If you are using Windows, it is recommended to install and run a Linux OS in VirtualBox or VMWare. You also need JDK 1.8+ and Python 2.7+ or 3.4+ to run the code examples.

Download the example code files

You can download the example code files for this book from your account at If you purchased this book elsewhere, you can visit and register to have the files emailed directly to you.

You can download the code files by following these steps:

  1. Log in or register at
  2. Select the SUPPORT tab.
  3. Click on Code Downloads & Errata.
  4. Enter the name of the book in the Search box and follow the onscreen instructions.

Once the file is downloaded, please make sure that you unzip or extract the folder using the latest version of:

  • WinRAR/7-Zip for Windows
  • Zipeg/iZip/UnRarX for Mac
  • 7-Zip/PeaZip for Linux

The code bundle for the book is also hosted on GitHub at In case there's an update to the code, it will be updated on the existing GitHub repository.

We also have other code bundles from our rich catalog of books and videos available at Check them out!

Download the color images

We also provide a PDF file that has color images of the screenshots/diagrams used in this book. You can download it here:

Conventions used

There are a number of text conventions used throughout this book.

CodeInText: Indicates code words in text, database table names, folder names, filenames, file extensions, pathnames, dummy URLs, user input, and Twitter handles. Here is an example: "Open a Terminal and connect to Redis with redis-cli."

A block of code is set as follows:

for i in `seq 10`
nohup node generator.js hash 1000000 session:${i} & 

Any command-line input or output is written as follows:> SETBIT "users_tried_reservation" 100 1
(integer) 0

Bold: Indicates a new term, an important word, or words that you see onscreen. For example, words in menus or dialog boxes appear in the text like this. Here is an example: "Click Import Project from Sources and select the redis-4.0.1 sub-directory in the coding directory."


Warnings or important notes appear like this.


Tips and tricks appear like this.


In this book, you will find several headings that appear frequently (Getting ready, How to do it..., How it works..., There's more..., and See also).

To give clear instructions on how to complete a recipe, use these sections as follows:

Getting ready…

This section tells you what to expect in the recipe and describes how to set up any software or any preliminary settings required for the recipe.

How to do it…

This section contains the steps required to follow the recipe.

How it works…

This section usually consists of a detailed explanation of what happened in the previous section.

There's more…

This section consists of additional information about the recipe in order to make you more knowledgeable about the recipe.

See also

This section provides helpful links to other useful information for the recipe.

Get in touch

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