Redis实战指南：高效数据管理与性能优化

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"Redis Essentials"是一本专为有数据结构服务器工作经验、寻求提升项目性能的开发者编写的实用指南。本书深入浅出地介绍了Redis——这款广受欢迎的内存键值存储系统，它以其轻量级和高效的数据类型在众多数据库中脱颖而出。通过本书，读者将学习如何： 1. 高效利用数据类型：理解并应用字符串、哈希、列表等基本数据类型，以及Bitmaps和Hyperloglogs用于构建分析应用的独特方法。 2. 扩展和管理：掌握如何使用Twemproxy、Redis Sentinel和Redis Cluster来实现水平扩展，确保系统的高可用性和可靠性。 3. 技术实现：学习如何在Node.js中构建时间序列实现，并了解如何使用Lua扩展Redis以自定义命令。 4. 安全性保障：了解和实践安全措施，如SSL加密、防火墙规则和基本授权，保护你的数据免受攻击。 5. 持久化与存储：理解AOF和RDB两种持久化机制的优缺点，确保数据在服务器故障后能可靠恢复。 6. 客户端集成：熟悉如何使用Node.js、PHP、Python和Ruby等多种语言的Redis客户端进行交互。 7. 避免设计陷阱：书中提供实际案例，帮助读者识别和解决设计过程中的常见问题，提升解决方案的质量。 8. 实战应用：本书以实践为导向，通过一系列步骤引导读者深入了解Redis的核心概念和功能，结合真实世界的例子，帮助读者最大化利用Redis优化项目性能。 "Redis Essentials"适合希望通过学习Redis特性提升项目性能的开发者，无论是初学者还是有一定经验的开发者，都能从中收获宝贵的知识和实践经验。版权方面，请注意尊重作者和出版社的权益。

Table of Contents

[ v ]

Finding nodes and redirects 180

Conguration 181

Different Redis Cluster architectures 183

Cluster administration 185

Creating a cluster 185

Adding slaves/replicas 188

Scaling reads using slave nodes 190

Adding nodes 190

Removing nodes 194

Redis Cluster administration using the redis-trib tool 194

Summary 196

Index 197

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Preface

[ viii ]

Chapter 4, Commands (Where the Wild Things Are), introduces Pub/Sub, transactions, and

pipelines. It also introduces the scripting mechanism, which uses the Lua programming

language to extend Redis. A quick Lua syntax reference is also presented. A great

variety of Redis commands are presented in this chapter, including the administration

commands and data type commands that were not covered in the previous chapters.

This chapter also shows you how to change Redis's conguration to optimize different

data types for memory or performance.

Chapter 5, Clients for Your Favorite Language (Become a Redis Polyglot), shows how to

use Redis with PHP, Python, and Ruby. This chapter highlights the features that

vary more frequently with clients in different languages: blocking commands,

transactions, pipelines, and scripting.

Chapter 6, Common Pitfalls (Avoiding Traps), illustrates some common mistakes

when using Redis in a production environment and related stories from real-world

companies. The pitfalls in this chapter include using the wrong data type for a given

problem, using too much swap space, and using inefcient backup strategies.

Chapter 7, Security Techniques (Guard Your Data), shows how to set up basic security

with Redis, disable and obfuscate commands, protect Redis with rewall rules, and

use client-to-server SSL encryption with stunnel.

Chapter 8, Scaling Redis (Beyond a Single Instance), introduces RDB and AOF

persistence, replication via Redis slaves, and different methods of partitioning

data across different hosts. This chapter also shows how to use twemproxy to

distribute Redis data across different instances transparently.

Chapter 9, Redis Cluster and Redis Sentinel (Collective Intelligence), demonstrates the

differences between Redis Cluster and Redis Sentinel, their goals, and how they

t into the CAP theorem. It also shows how to set up both Sentinel and Cluster,

their congurations, and what happens in different failure scenarios. Redis Cluster

is covered in more detail, since it is more complex and has different tools for

managing a cluster of instances. Cluster administration is explained via native

Redis commands and the redis-trib tool.

What you need for this book

The examples in this book assume that you have a computer with GNU/Linux or

Mac OS X. We also assume that the following are installed:

• Node.js 0.12.4

• NPM

• Redis 3.X

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