** High concurrency is an experience that almost every programmer wants to have. ** The reason is simple: as traffic increases, there are all kinds of technical problems such as interface response timeouts, increased CPU load, frequent GC, deadlocks, large data storage, etc., which drive us to continue to improve in technical depth.

In the past, if a candidate is working on a project with high concurrency, the interviewer will often ask the candidate to talk about their understanding of high concurrency, but not many people can systematically answer this question

Therefore, in this article, xiaobian would like to combine his experience in high-concurrency projects and systematically summarize the knowledge and practical ideas needed to master high concurrency, so I bring you a copy of “Alibaba Billion level concurrency System Design (2021 version)”, at the same time, I also hope to help you. The content is mainly divided into the following seven parts: basic, database, cache, message queue, distributed services, maintenance, combat ~ words not to say, we directly read: (want to get this information partners directly read the end of the article)

The main content

Based on article

Database article

Cache article

Message queue

Distributed Services

Maintain article

Practical article

The content in

  • System design goal: How to make the system easy to scale?

  • Database optimization scheme: how to separate master from slave when query request increases?

  • Sender: how to ensure the global uniqueness of ID after sub-database sub-table?

  • Caching: How can queries for dynamic data be accelerated when the database becomes a bottleneck?

  • Message queuing: How can message latency be reduced in message queuing systems?

  • Distributed Trace: How do I troubleshoot slow requests that span dozens of distributed components?

  • Degraded fuses: How to shield non-core System failures?

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

  • Information Flow Design: How to do the pull pattern of a general information flow system?

The last

I hope this article gives you a more comprehensive understanding of high concurrency, and if you have some useful experiences and in-depth thinking, please leave a comment in the comments section.

Due to the length reasons, xiaobian is just a simple way to present the article screenshots to you! Need to get this “Alibaba billion concurrent system design (2021 version)” friends directly add xiaobian VX: mxzFAFAFA can!