Redis Essentials电子书

Redis Essentials

Table of Contents

Redis Essentials

Credits

About the Authors

Acknowledgments

About the Reviewers

www.PacktPub.com

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Free access for Packt account holders

Preface

What this book covers

What you need for this book

Who this book is for

Conventions

Reader feedback

Customer support

Downloading the example code

Errata

Piracy

Questions

1. Getting Started (The Baby Steps)

Installation

Installing from source

Hello Redis (command-line interface examples)

Installing Node.js

JavaScript syntax quick reference guide

Hello World with Node.js and Redis

Redis data types

Strings

String examples with redis-cli

Building a voting system with Strings using Node.js

Lists

List examples with redis-cli

Implementing a generic Queue System

Hashes

Using Hashes with redis-cli

A voting system with Hashes and Node.js

Summary

2. Advanced Data Types (Earning a Black Belt)

Sets

Set examples with redis-cli

Building a deal tracking system

Sorted Sets

Sorted Set examples with redis-cli

Building a leaderboard system for an online game

Bitmaps

Bitmap examples with redis-cli

Building web analytics

HyperLogLogs

Counting unique users – HyperLogLog versus Set

HyperLogLogs examples with redis-cli

Counting and retrieving unique website visits

Summary

3. Time Series (A Collection of Observations)

Building the foundation

Optimizing with Hashes

Adding uniqueness with Sorted Sets and HyperLogLog

Summary

4. Commands (Where the Wild Things Are)

Pub/Sub

Transactions

Pipelines

Scripting

Lua syntax basics

Redis meets Lua

Miscellaneous commands

INFO

DBSIZE

DEBUG SEGFAULT

MONITOR

CLIENT LIST and CLIENT SET NAME

CLIENT KILL

FLUSHALL

RANDOMKEY

EXPIRE and EXPIREAT

TTL and PTTL

PERSIST

SETEX

DEL

EXISTS

PING

MIGRATE

SELECT

AUTH

SCRIPT KILL

SHUTDOWN

OBJECT ENCODING

Data type optimizations

String

List

Set

Hash

Sorted Set

Measuring memory usage

Summary

5. Clients for Your Favorite Language (Become a Redis Polyglot)

PHP

The basic commands in PHP

The blocking commands in PHP

Pipelines in PHP

Transactions in PHP

Scripting in PHP

Python

The basic commands in Python

The blocking commands in Python

Pipelines in Python

Transactions in Python

Scripting in Python

Ruby

The basic commands in Ruby

The blocking commands in Ruby

Pipelines in Ruby

Transactions in Ruby

Scripting in Ruby

Summary

6. Common Pitfalls (Avoiding Traps)

The wrong data type for the job

The Set approach

The Bitmap approach

Multiple Redis databases

Keys without a namespace

Using Swap

Not planning and configuring the memory properly

An inappropriate persistence strategy

Summary

7. Security Techniques (Guard Your Data)

The basic security

Obfuscating critical commands

Networking security

Protecting Redis with firewall rules

Running Redis on the loopback network interface

Running Redis in a Virtual Private Cloud

Encrypting client-to-server communication

Running stunnel on both the server and the client

Running stunnel on the server and using a Redis client that supports SSL

Summary

8. Scaling Redis (Beyond a Single Instance)

Persistence

RDB (Redis Database)

AOF (Append-only File)

RDB versus AOF

Replication

Partitioning

Range partitioning

Hash partitioning

Presharding

Consistent hashing

Tagging

Data store versus cache

Implementations of Redis partitioning

Automatic sharding with twemproxy

Other architectures that use twemproxy

Summary

9. Redis Cluster and Redis Sentinel (Collective Intelligence)

The CAP theorem

Redis Sentinel

The basic Sentinel configuration

Connecting to Sentinel

Network partition (split-brain)

Redis Cluster

Hash slots

Hash tags

Creating a basic cluster

Finding nodes and redirects

Configuration

Different Redis Cluster architectures

Cluster administration

Creating a cluster

Adding slaves/replicas

Scaling reads using slave nodes

Adding nodes

Removing nodes

Redis Cluster administration using the redis-trib tool

Summary

Index