High concurrency is an experience that almost every programmer wants to have.The reason is very simple: as the traffic increases, various technical problems will be encountered, such as interface response timeout, CPU load increase, frequent GC, deadlock, big data volume storage and so on, theseQuestions can push us to keep improving in technical depth.

In past interviews, if the candidate did High Concurrency projects, the interviewer usually asks the other party to talk about their understanding of high concurrency, but those who can answer this question systematically will notNot much~

Therefore, in this article, the editor wants to combine his own experience in high concurrency projects to systematically summarize the knowledge and practical ideas that high concurrency needs to master, so I will bring you a "Alibaba Billion Billion"Level ConcurrencySystem Design (2022 Edition)", and at the same time, I hope it will be helpful to everyone.The content is mainly divided into the following 7 parts: basic articles, database articles, cache articles, message queue articles, distributed service articles, maintenance articles, and actual combat articles.

Main content

The Basics

Database articles

Cache articles

Message queue articles

Distributed Services

Maintenance

Actual combat articles

Content List

• System design goals: How to make the system easy to expand?

• Database optimization plan: How to separate master and slave when query requests increase?

• Identifier: How to ensure the global uniqueness of ID after sub-database and sub-table?

• Cache: After the database becomes the bottleneck, how to speed up the query of dynamic data?

• Message Queuing: How to Reduce the Delay of Messages in a Message Queuing System?

• Distributed Trace: How to troubleshoot slow requests across dozens of distributed components?

• Downgrade circuit breaker: How to shield the impact of non-core system failures?

• Counting system design: How to design an unread system under 500,000 QPS?

• Information flow design: How to do the pull model of a general information flow system?

Last

I hope this article can give you a more comprehensive understanding of high concurrency. If you have experience and in-depth thinking that you can learn from, please leave a message in the comment area for discussion.

Due to space reasons, the editor simply presents the screenshots of the article to everyone!

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