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

Combining RDB and AOF


In the previous recipes of this chapter, we have described both RDB and AOF persistence options. When it comes to data persistence, there are always several factors you should take into consideration: data loss in case of an outage, performance cost when saving data, the size of the persisted file, and the speed of restoring data. For RDB, data written into Redis between two snapshots may get lost. The latency and memory cost of a system call fork() in RDB may become a problem when the writing traffic is high and the dataset is big. However, compared to AOF, an RDB dumping file takes less disk space, and restoring data from an RDB dump is faster. In fact, you can enable both features at the same time.

In this recipe, we will explore how to take the best of both persistence approaches.

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. Basic knowledge...