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
Dedication
Packt Upsell
Foreword
Contributors
Preface
13
Windows Environment Setup
Index

Troubleshooting replication


In a real production environment, you may run into many issues and get into trouble when using Redis replication. Many factors, such as disk I/O, network connectivity, the size of datasets, and long blocking operations, may become the root cause of replication failures.

In this recipe, we will take a look at a few replication failure cases and solutions to see what we can do if replication is not working as expected.

Getting ready…

You need to finish the installation of the Redis Server as we described in the Downloading and installing Redis recipe in Chapter 1, Getting Started with Redis. You should also finish setting up replication, as described in the Setting up Redis replication recipe in this chapter.

To generate a large amount of sample data, we use fake2db mentioned in the Managing keys recipe in Chapter 2, Data Types to populate some fake data to Redis. Due to differing hardware performance, it may take you several hours to finish the data population:

# fake2db...