Tag：Seckill
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Time：2020-11-18
Soul torture Second kill this kind of large concurrent writing scene, directly sub database sub meter open dry? Is it hard to deal with the traffic peak of seckill? Don’t fool me with Taobao level seconds Characteristics of seckilling activities I dare say that all the students who have done e-commerce will encounter the “high […]
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Time：2020-11-15
Second kill idea based on PHP spool extension After AB pressure test, the average QPS of script is 4500 ab -n1000 -c10 http://127.0.0.1:9501/skill Script code, ideas are basically explained in the code comments application-Index.php /** *Using the Chan and coprocess of swoole to deal with seckill *Ideas *Set the channel number of a channel to […]
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Time：2020-9-30
Seckill background implementation This paper mainly explains how to solve the following problems in the actual combat of the project 1) Realize the asynchronous order of the second kill, master how to ensure that the producer consumer message is not lost 2) To prevent malicious swiping 3) To prevent the same product from repeated second […]
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Time：2020-9-21
Source: https://urlify.cn/jyYny2 For online system optimization, it itself is a technical activity. It not only needs strong technical combat ability, strong problem positioning, problem identification, problem troubleshooting ability, but also needs a lot of tuning ability. This article from the practical point of view, from the problem identification, problem positioning, problem analysis, put forward solutions, […]
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Time：2020-9-14
Let’s think about message queuing： 1. Why is MQ used in the system? Must it be used in distributed systems? 2. What middleware does MQ have? What are their characteristics? 3. Does MQ bring benefits to the system, but does it bring any problems? How to solve it? Generally, during our interview, the interviewer will […]
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Time：2020-9-4
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Time：2020-6-24
The origin of flow peak cutting It mainly comes from the business scenarios of the Internet, for example, the Spring Festival train ticket rush to start soon, a large number of users need to rush to buy at the same time; and the well-known Alibaba double 11 seconds kill,In a short time, hundreds of millions […]
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Time：2020-3-7
The more you know, the more you don’t know Take a look at it and get used to it GitHubHttps://github.com/javafamily has the brain map and personal contact information of the interview site of the first-line large-scale factory. Welcome to star and advice Preface RedisIt is so widely used in Internet technology storage that almost all […]
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Time：2020-3-4
1、 Why is it difficult The reason why the seckill system is hard to do: there is only one inventory, and everyone will read and write these data in the centralized time. For example, the second kill of Xiaomi mobile phone every Tuesday may only have 10000 mobile phones, but the instantaneous traffic may be […]
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Time：2020-2-8
Application scenario https://www.imooc.com/video/15163 Redundancy: delay processing and guarantee completion Decoupling: access decoupling Traffic peak cancellation: redis cache Asynchronous communication: asynchronous scenario Convenient extension: the result of decoupling Sequencing guarantee: sequencing 1. MySQL lock queue —Order system [manufacturer]–Receive order, core code: //Save order information to order form $db = DB::getIntance(); $res = $db->insert(“order_queue”, $insert_data); –Distribution system […]
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Time：2019-12-25
abstract: this blog post is the second in a series of Java seckill system practical articles. It mainly shares how to build a multi module project based on spring boot + spring MVC + mybatis + distributed middleware using idea, i.e. “seckill system”!. contentThe traditional project of building springboot based on idea is built directly […]
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Time：2019-11-29
Abstract: This blog post is the third in a series of “Java seckill system actual combat articles”. This blog post will mainly introduce the overall business process of seckill system, and design the database according to the corresponding business process. Finally, use mybatis reverse engineering to generate the corresponding entity class entity, interface mapper for […]
