Tag：stock
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Time：2021-7-19
Reading guideMany years ago, the media asked Ding Shuibo: “for you personally, what is the most painful part in the process of transformation?”“ The key is the change of market consciousness. Hearing is false and seeing is true. Only when they are seen by the outside world can they understand and accept it. A lot […]
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Time：2021-7-14
We do cross-border e-commerce, do Amazon API development all understand, the first thing is the document thing, Amazon’s Chinese document is very pit, there is wood（ Originally, the English documents are quite boring. Keep your voice down (BB ~) OK, make complaints about it. Now we are entering the topic. Our team considers that many […]
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Time：2021-7-14
How to achieve high availability in high concurrency system principle CDN; CDN; Nginx current limiting, asynchronous queue (high concurrent traffic becomes shared traffic)Divide and rule: LVS + nginx load balancing features Write strong consistency (not oversold)Read weak consistency (read may be in stock, but cannot place an order) Core implementation Implementation of reading serviceWrite service […]
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Time：2021-7-9
Project documents 1. Basic introduction 1.0 project introduction The project is based on B / S architecture, involving the purchase, sales and inventory, financial module, document printing and various reports. 1.1 applicable scenarios Production and processing of down, feather products manufacturers. 1.2 technical exchange QQ group: 1129427935 students interested in ERP can come in to […]
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Time：2021-7-8
In most distributed applications, in order to improve the efficiency of the system, cache will be introduced, such as redis. At the same time, it will bring the problem of inconsistent cache and database data.If the requirements for data consistency are not very high, our normal operation is that the client first caches the query. […]
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Time：2021-7-1
Let’s talk about an interesting topic today How to optimize the concurrency of distributed locks in the scenario of thousands of orders per second? Background introduction First of all, let’s look at the background of this problem? Some time ago, a friend was interviewing outside. Then one day, he came to me and said: […]
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Time：2021-6-12
1、 Basic concepts 1. Introduction Traditional locks are all solutions with JDK official locks, that is to say, these locks can only be valid in one JVM process. We call this kind of lock a single application lock. However, with the rapid development of the Internet, can single application lock meet our needs? New reading […]
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Time：2021-5-29
Seata is an open source distributed transaction solution based on Java AT，XA，TCC，Saga Seata provides four modes to solve distributed transaction scenarios: at, Xa, TCC and saga. My understanding of these models AT This is a major feature of Seata. At is completely non-invasive to the business code, very simple to use, and low transformation cost. […]
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Time：2021-4-15
In order to ensure the strong consistency of data in distributed environment, it is necessary to introduce distributed transaction, which is difficult to implement because of the uncertainty of network environment. For details, see the previous article. In distributed environment, I want strong consistency In order to ensure the correctness of distributed transactions, there are […]
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Time：2021-2-12
preface This article is one of my previous series of articles, which mainly discusses the problems that we need to use in the normal development process and major systemsCache dataThe problem is further extended toDouble write consistency between database and cacheAnd gives the implementation code of all the schemes for your reference. The main content […]
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Time：2021-2-10
We often encounter rush buying and second killing in online shopping, which is a very common application scenario. There are two main problems to be solvedHigh concurrency pressure on the database, resulting in server downtime, crash.2. How to solve the problem of inventory reduction (oversold) under the condition of competitionFor the first problem, it’s easy […]
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Time：2021-2-8
Wholesale distribution ERP software needs in-depth functions to manage the distribution process, simplify the supply chain, enhance the ability of retail and e-commerce departments, and cope with back office operations. Powerful ERP is a necessary tool for wholesale and distribution business. It helps to manage the unique needs of enterprises engaged in wholesale markets. Through […]
