Amazing! 1024 Programmer's Day Jingdong T8 Hand-coded Redis core principle manual, the basis and source code are the same!

Redis is the most widely used middleware for Internet technology architecture in storage systems. It is also one of the most popular engineering skills for interviewers in technical interviews with middle and senior back-end engineers , especially those excellent and highly competitive large Internet companies ( For example, Twitter, Sina Weibo, Alibaba Cloud, Tencent Cloud, Taobao, Zhihu, etc.), interviewers are usually required to not only master the basic use of Redis, but also require a deep understanding of the detailed principles of Redis internal implementation.

It is no exaggeration to say that if you can fully understand the knowledge of Redis, half of your foot will have entered the technology research and development department of your favorite large company. But in the many interviews I usually go through, I found that most students only use Redis as data caching and use the simplest get/set method. Other than that, they are almost at a loss. There are also a small number of students who know Redis's distributed locks, but they are not clear about its internal implementation mechanism, and even non-standard in use, which leads to unexpected problems in the production environment.

There are still many students who did not realize that Redis is a single-threaded structure, nor did they understand that Redis can support high concurrency and so on. In order to better learn Redis and thoroughly understand Redis, sum up your own practical experience for everyone, and help more back-end developers master Redis skills faster and more deeply, Redis core notes, practical notes, Redis interview topics and X-mind are prepared Version of the mind map.

Due to space reasons, the information is only partially displayed. Those who need to obtain the full version of the information can get the way to receive it at the end of the article!

 

The following content of this article mainly shares the important content recorded in this Redis high-level core notebook . The book is mainly divided into 6 major areas:

① The basics of Redis

② Application of Redis

③ Principles of Redis

④ Redis cluster articles

⑤Redis expansion articles

⑥Redis source code

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Redis advanced core notes

1. The basics of Redis

The so-called "Teaching people to fish is not as good as teaching people to fish." The original intention and goal of this editor is to help back-end developers understand the principles and practical experience behind Redis more deeply, so as to know what it is and why it is, for the future Advanced growth prepares architects.

1. Opening: Teaching people how to fish instead of teaching people how to fish-what can Redis be used for?

2. Basics: building on the ground with a huge height-Redis basic data structure

 

Two, Redis application articles:

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3. Principles of Redis:

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Four, Redis cluster articles:

 

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Five, Redis expansion chapter:

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Six, Redis source code article:

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Since the length of the article cannot be too much, I consider the impression, the following content I only show the main points of this note, for specific details, you can ask me to get the full pdf version, and you can get it free of charge by private message.

At the end of the end, just as preparations for the Golden Nine-Silver Tenth Interview, I will send you all the Redis interview topics that big companies must ask, big companies can pass, others can pass!

 

Redis interview topics

One, Redis concept understanding

1. What is Redis?
2. What are the characteristics of Redis?
3. What are the differences between Memcache and Redis? What are the advantages of Redis over Memcached?
4. How to implement local caching? Please describe-the way you know
5. What is the Redis communication protocol? What are its characteristics?

Two, Redis data structure and instructions

• Please explain the difference between Redis batch commands and Pipeline?
• Please introduce Redis's publish and subscribe function
• What are the characteristics of Redis's linked list data structure?
• Please introduce the underlying implementation of Redis's String type?
• What are the benefits of using the SSD method of Redis's String type? What are the commands for setting the key lifetime and expiration time?

Three, Redis high concurrency processing strategy

• Why is Redis designed to be single-threaded? What is cache penetration? How to solve it?
• What is a cache avalanche? How to solve it?
• There are several cache update strategies? What are the precautions for each? Please introduce several reasons that may cause Redis blocking
• How to find abnormal blocking of Redis?

Fourth, Redis cluster structure and design concept

• Please introduce the Redis cluster implementation scheme
• Will some operations of the Redis cluster be lost? Why? What is Redis slow query? What configuration?
• What are the Redis slow query repair experience? How to fix it? How to optimize the performance of Redis service?
• What are the advantages and disadvantages of Redis's master-slave replication model?
• What are the advantages and disadvantages of Redis sentinel mode?

Five, Redis cache management and persistence mechanism

• What is bigkey and what is the impact?
• How did you discover bigkey?
• What are the memory consumption classifications of Redis?
• What command is used for memory statistics?
• Briefly introduce the memory management methods of Redis?
• How to set the memory limit of Redis? What is the effect?
• What to do if Redis reports insufficient memory?

Six, Redis application scenario design

• What is a distributed lock and what does it do?
• What can be achieved by distributed locks?
• Introduce the matters needing attention in the implementation of distributed locks?
• How does Redis implement distributed locks?
• What does the cache hit rate mean? How to improve the cache hit rate?
• Please introduce Spring annotation caching

 

to sum up

For programmers, Redis involves a lot of knowledge points. Although a lot of advanced and bottom-of-the-box content has been crazy expanded, it still fails to take into account all aspects of Redis , so for programmers, the starting line is The same, there is no offer that can't be taken, only the ability to be hard enough.

In any case, it is definitely helpful to prepare early for your interview. The above Redis advanced document can help you in the golden nines and silvers.

If you need this complete Redis advanced document, just move your fingers:

Follow the article three times, pay attention to it, and then send a private message to "data" or scan the following to get the document directly for free~