foreword
As the title says, I've now gotten my wish into bytes! Before that, I had been working in a small or small outsourcing company, doing repeated layers of deletion, modification and checking every day. Until the end of 22, I got the interview opportunity of Byte through a friend’s introduction. After reviewing at home for 3 months, I successfully got the offer of Byte. The most important review material for me is this Redis technical note. Let me understand by analogy, it is very helpful for my technical development!
Introduction to Redis notes
As a typical key-value database with high performance, high reliability and high scalability, Redis is not only powerful, but also stable, so it has naturally become the first choice of large Internet companies.
When many large companies recruit, they will not only require interviewers to be able to use Redis simply, but also to have a deep understanding of the underlying implementation principles and the ability to solve common problems. It can be said that proficiency in Redis has become an essential skill for technical people.
However, in the process of learning and using Redis, it is inevitable to encounter some difficult problems, such as:
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How should the key and data structure of Redis be designed? What is the best practice way? * How does the Redis cluster balance data? And how to scale horizontally? * How to ensure data consistency? How to solve the problem of hot data? * For the data snapshot generated by RDB persistence, is each update a full update or an incremental update? * How to solve problems such as cache avalanche, cache penetration, cache warm-up, cache update, and cache downgrade? * How to read Redis source code efficiently?
This note sorts out a set of systematic Redis learning methods. Summarize the complicated Redis knowledge and problems into the framework of "two dimensions, three main lines", hoping to help you establish a system view and a global view, so as to help you thoroughly understand the underlying implementation principles. In addition, the notes will also explain common problems and solutions in detail, and explain the application of Redis in typical scenarios (such as caching and spikes), so that you can quickly grasp effective practical experience and apply it to your own Redis In actual combat projects, improve your skills in all aspects!
Redis note module
This note introduces the 5 data types of Redis in a simple way, and shows the usage of Redis through several practical examples. In addition, the notes also describe the optimization method and extension method of Redis, which is a rare reference book for learning and using Redis.
The notes consist of three parts.
The first part introduces Redis, explains the basic usage of Redis, the 5 data structures it has and the commands to operate these 5 data structures, and explains how to use Redis to build article aggregation websites, cookies, shopping carts , Web cache, database row cache and a series of programs.
The second part introduces Redis commands in more detail, and shows how to use Redis to build more complex auxiliary tools and applications, and finally shows how to use Redis to build a simple social networking site.
The third part introduces some problems that Redis users often encounter, and explains the methods of reducing Redis memory usage, extending Redis performance and using Lua language for script programming.
The notes cover not only introductory topics such as command usage, but also in-depth topics such as replication, clustering, and performance expansion, so whether you are a Redis novice or an experienced Redis user, you should be able to benefit from the notes.
The content of the notes is too long to display one by one, now select the important parts to display! The full version can be downloaded at the bottom of the article
Notes Part 1: Knowing Redis
The second part of the notes: Redis core concepts
Notes Part III: Redis Command Manual
The fourth part of the note: Redis uses Redis to build support programs
Notes Part Five: Redis Advanced Practical Tutorial
Notes Part Six: Building Application Components Using Redis
Part Seven of Notes: Building a Social Networking Site Using Redis
Note content detailed explanation
The general summary of the notes will be to start with the key architecture of building a key-value database, which will not only help you establish an overall view, but also help you quickly grasp the core main line. In addition, it will explain in detail the data structure, threading model, network framework, persistence, master-slave synchronization, and slice clusters, etc., to help you understand the underlying principles.
Focus on introducing the practical experience of Redis from two dimensions of typical cases and common scenarios. At the "case" level, it will explain in detail the key skills of rational use of data structures, avoiding request blocking and jitter, and improving memory usage efficiency; at the "scenario" level, it will thoroughly explain the basic principles of caching for the two major scenarios of caching and clustering , as well as solutions to abnormal situations such as avalanche, penetration, and pollution. It will also share specific and feasible solutions around issues such as cluster solution optimization, data consistency, and high concurrent access.
How to get this high-quality note
The author hereby solemnly promises that this note is 100% free to everyone, and it is recommended that everyone use the fragmented time for systematic study. Whether you get this note for a surprise interview or to check for omissions, I believe it will be a great help to everyone's work!
Friendship sharing: It is not easy to code the article, I hope you will like + forward + comment to support a wave. The full version can be downloaded below