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

Using the Geo data type


Location-based service has gained in popularity as smartphones have become increasingly more common. The Geo API has been introduced officially in Redis, since Release 3.2, to support storing and querying geospatial coordinates for these location-related scenarios. In this recipe, we will explore the Geo data type in Redis.

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, and connect to the Redis Server by redis-cli.

How to do it...

To understand how to use the Geo data type, take the following steps:

  1. Open a Terminal and connect to Redis with redis-cli.
  1. For the demo application Relp, we can add five restaurants in California to a Geo set called restaurants:CA, by using GEOADD:
127.0.0.1:6379> GEOADD restaurants:CA -121.896321 37.916750 "Olive Garden" -117.910937 33.804047 "P.F. Chang's" -118.508020 34.453276 "Outback Steakhouse" -119.152439 34...