On the "Golden Nine Silver Ten", young graduates are full of hope and anxiety, looking for and competing for a job opportunity. The development students who are already on the job also want to get better treatment and a bigger platform through social recruitment or internal promotion.
However, there are a large number of interviewers, and the technical market is relatively cold. The students who are interviewed have to face the huge competition of N candidates for 1 position.
Q: Under this situation, how can we get more and better offers?
A: Short-term preparation - brushing interview questions; long-term planning - consolidating core skills.
How to brush the interview questions? Brush high-frequency questions, deep questions, and time-sensitive questions.
How to consolidate core skills? First in-depth understanding of the principle, and then systematically apply it to practice.
Redis is the most widely used middleware for Internet technology architecture in storage systems, and it is also one of the most popular engineering skills that interviewers like to ask in technical interviews for middle and senior back-end engineers , especially those excellent and competitive large Internet companies ( Such as Twitter, Sina Weibo, Alibaba Cloud, Tencent Cloud, Taobao, Zhihu, etc.), interviewees are usually required not only to master the basic use of Redis, but also to have a deep understanding of the details of the internal implementation of Redis.
**It is no exaggeration to say that if you can fully understand all the knowledge points of Redis, you have already stepped into the technology research and development department of your favorite big company. **But in many interviews I have experienced, I found that most students only use Redis as a data cache, 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 the distributed lock of Redis, but they are not clear about its internal implementation mechanism, and even its use is not standard, resulting in unexpected problems in the production environment.
There are still many students who do not realize that Redis is a single-threaded structure, and do not understand that Redis can support high concurrency and so on with a single thread. In order to better learn Redis and understand Redis, summarize and summarize their practical experience for everyone, and help more back-end developers to master Redis skills faster and more deeply, prepared Redis core notes, actual combat notes, Redis interview topics and X-mind version of the brain map.
Due to space reasons, the information is only partially displayed, and those who need to obtain the full version of the information can read the method at the end of the article!
The following content of this article mainly shares the important content recorded in this Redis Advanced Core Notes , which is mainly divided into 6 major aspects:
① Basics of Redis
②Application of Redis
③The principle of Redis
④Redis cluster articles
⑤Extension of Redis
⑥Redis source code
Without further ado, come on! exhibit! keep looking down
Redis Advanced Core Notes
1. The basics of Redis
The so-called "giving a man a fish is worse than teaching a man to fish", the original intention and goal of this editor is to help back-end developers to have a deeper understanding of the principles and practical experience behind Redis, so as to know what is and why, for the future Advanced growth prepares architects.
1. Opening: It is better to teach a man to fish than to give him a fish - what can Redis be used for?
2. Fundamentals: From the high-rise buildings and the ground - Redis basic data structure
2. Application of Redis:
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3. The principle of Redis:
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4. Redis cluster articles:
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Fifth, the expansion of Redis:
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6. The source code of Redis:
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Since the length of the article can't be too much, considering the look and feel, I only show the main points of this notebook in the following content. For the detailed explanation, you can find me to get the full pdf version.
Finally, at the time of preparation for the golden nine silver ten interviews, I will present to you the Redis interview topics that must be asked by the big manufacturers. The big manufacturers can pass it, and the others can pass! Pass! Pass!
Redis Interview Topics
1. Understanding the concept of Redis
- What is Redis?
- What are the characteristics of Redis?
- What are the differences between Memcache and Redis? What are the advantages of Redis over Memcached?
- How to implement local caching? Please describe - the way you know
- What is the Redis communication protocol? What are the characteristics?
2. Redis data structure and instructions
- Please explain how Redis batch commands are different from Pipeline?
- Please introduce the publish and subscribe function of Redis
- What are the characteristics of the linked list data structure of Redis?
- Please introduce the underlying implementation of the String type of Redis?
- What are the benefits of using SSD for the String type of Redis? What are the commands to set the lifetime and expiration time of keys?
3. 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?
- What are the strategies for updating the cache? What are the precautions for each? Please introduce some reasons that may cause Redis to block
- How to detect Redis blocking exceptions?
4. Redis cluster structure and design concept
- Please introduce the Redis cluster implementation scheme
- Will some operations be lost in Redis cluster? Why? What is Redis slow query? What configuration?
- What is the experience of Redis slow query repair? How to repair it? How to optimize the performance of Redis service?
- What are the advantages and disadvantages of Redis' master-slave replication mode?
- What are the advantages and disadvantages of Redis sentinel mode?
5. Redis cache management and persistence mechanism
- What is bigkey? What is the impact?
- How to discover bigkey?
- What are the memory consumption categories of Redis?
- What command is used for memory statistics?
- Briefly introduce what are the memory management methods of Redis?
- How to set the memory limit of Redis? What does it do?
- How to deal with Redis report of insufficient memory?
6. Redis application scenario design
- What is a distributed lock? What does it do?
- What can distributed locks be implemented through?
- Introduce the matters needing attention in distributed lock implementation?
- How does Redis implement distributed locks?
- What does the cache hit rate mean?. How to improve the cache hit rate?
- Please introduce Spring annotation cache
Summarize
For programmers, Redis involves a lot of knowledge points. Although it has expanded a lot of advanced and bottom-up content, it still cannot take into account all aspects of Redis , so for programmers, the starting line is all In the same way, there is no offer that cannot be won, only the ability to be tough enough.
In any case, it is definitely helpful to prepare for your interview early. The above Redis advanced document can help you in Jinjiuyinshili.
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