Programmer Think

Summary DataX is an offline data synchronization tool/platform widely used in Alibaba Group. It implements efficient data synchronization among various heterogeneous data sources, including MySQL, Oracle, SqlServer, Postgre, HDFS, Hive, ADS, HBase, TableStore(OTS), MaxCompute(ODPS), DRDS and so on.Aliyun has already source this tool, the curren ...

Introduction to Python Full Stack Learning (II) code annotation Single-Line Comments Single-line comments need only be preceded by #. multiline comment Hide multi-line comments with three single quotes or three double quotes """ Note Content """ perhaps ''' Note Content ''' You can use multi-line annotations when writing long pieces of prompt ...

Authors: Sans_ juejin.im/post/5cb880c2f265da03981fc031 I. Explanation When we use SpringBoot, we often introduce some Starters, such as spring-boot-starter-web. Officials provide us with almost all default configurations, which greatly reduces the complexity of using the framework. So when using xxx-starter, you can not bother to write ...

Short links are more or less used by us. The so-called short links are to generate a shorter link according to the long original link url. Visiting short links can jump to the corresponding original link. This is good in: 1. url is more beautiful; 2. It is easy to save and disseminate; 3. Some websites have word limit in content publishing, sho ...

Web Components Start Build your own custom components without adding any dependenciesHTML tags with styles, interactive features, and elegant organization in their files https://developer.mozilla.org... Web Components are a different set of technologies that allow you to create reusable custom elements whose functions are encapsulated outside y ...

Recently, in the day after management, we need to upload some app package files. These packages are within several hundred megabytes in size. Normally, they are uploaded. They are not only very stressful to the server, but also consume server resourc ...

Links to the original text: https://www.jianshu.com/p/cd3de110b4b6 Brief Introduction to Body Parser In the http request type, POST, PUT and PATCH contain the request body, which is called request-body. In the original http module of No ...

Single Sign On (SSO) is one of the most popular solutions for business integration. SSO is defined as an application system in which users can access all trusted applications with only one login. Implementing single sign-on Before the beginning If you don't know about user pooling, single sign-on, and authentication authorization, read it first ...

Catalog 1.C/S B/S Architecture 2. Principle of Network Communication 3.osi seven-tier protocol 4.UDP TCP Protocol 5. Three Handshakes and Four Waves of TCP Protocol 6.socket socket 7. Simple socket communication based on TCP protocol 8. socket Loop Communication Based on ...

This paper briefly introduces the new function multi-value index introduced in 8.0.17 below. As the name implies, the index can create multiple secondary index items on the same Primary key. In fact, it already supports the basic function of array type (feel that the official future will introduce array column type like pg), and based on arrayT ...