Basic scheme for troubleshooting Linux server

Server architecture The server system is Centos7 First, we need to know the external architecture of the system General architecture: 1. Domain name - > ECS 2. Domain name - > CDN - > cloud server (OSS) 3. Domain name - > CDN - > ECS + RDS + Redis cache 4. Domain name - > CDN - > Load Balancing - > ECS + RDS (mast ...

Posted by xymbo on Wed, 02 Mar 2022 04:09:02 +0100

A post takes you through a full backstage using vue

introduce vue-element-admin Is a back-end front-end solution based on vue and element-ui Realization. It uses the latest front-end technology stack, built-in i18 internationalization solutions, dynamic routing, privilege validation, extracts a typical business model, provides rich functional components, which can help you quickly build enterpr ...

Posted by waygood on Tue, 01 Mar 2022 19:06:06 +0100

Embedded Linux development busybox root file system production

1. Preface If you have done Linux system transplantation or Linux related development, you should be familiar with the term root file system. In the process of building an embedded development environment, you must do three things: porting bootloader, porting kernel and making root file system. The root file system is the first file system mo ...

Posted by baseballkid420 on Tue, 01 Mar 2022 17:41:58 +0100

Online Chat--Introduction and Realization of WebSocket

Before HTML5, browsers and servers communicated through the HTTP protocol, so what's the use of introducing a WebSocket? Imagine a web page broadcasting a score of a football match live in text. Without a WebSocket, the client, or browser, usually updates the score dynamically in two ways: AJAX and long polling. What is the difference between ...

Posted by phwae on Mon, 28 Feb 2022 18:41:14 +0100

Embedded Linux Development - Introduction to common commands of uboot (Part I)

1. Preface U-boot is an open source bootloader, which is used to guide operations and provide developers with testing and debugging tools. It is a simplified Linux system, which is mainly responsible for the initialization and boot of hardware. It has some tools as the boot program, often as the boot of embedded devices. When the real system s ...

Posted by jamesloi on Mon, 28 Feb 2022 17:35:33 +0100

CMake actual installation test and add environment to generate installation package

1. Installation test CMake can also specify installation rules and add tests. These two functions can be executed by using make install and make test after generating makefile. In GNU Makefile, you may need to write install and test pseudo targets and corresponding rules for this, but in CMake, such work also needs to simply call a few command ...

Posted by dev99 on Mon, 28 Feb 2022 14:05:01 +0100

Dom4j user manual

1, Use of Dom4j 1. Introduction to XML parsing There are two common XML parsing methods in daily development DOM: the parser is required to load the entire XML file into memory and generate a Document object. Advantages: the structure and relationship between elements are preserved, and you can add, delete, check and modify elements. Dis ...

Posted by flumpy on Mon, 28 Feb 2022 08:50:59 +0100

Socket network programming learning notes (10) simple chat room case

1. Data transmission design of chat room Necessary conditions: client and serverNecessary constraints: data transfer protocolPrinciple: the server listens to the message source, the client links to the server and sends a message to the server 1.1 data interaction between client and server The client sends a message to the server, and the se ...

Posted by VMinder on Mon, 28 Feb 2022 02:58:59 +0100

Practical exercise 3 (optional): deploy a three copy OceanBase cluster using OBD (offline installation)

Deployment planning This job is the three node deployment method of OceanBase cluster. Directly and remotely log in to the OceanBase node through the central control computer to deploy and start the observer and obproxy processes. Since there are exactly seven physical machines on hand, OBD will be directly deployed as an OceanBase cluster wi ...

Posted by scm24 on Sun, 27 Feb 2022 16:10:18 +0100

Asynchronous request pool

Asynchronous request pool What is the difference between synchronous and asynchronous? Concept: it is the relationship between the two. For example, processes and processes, or clients and servers. Whether the request will be suspended and wait for return after being called or sent. Synchronization: after calling the interface, the process ...

Posted by fou2enve on Sun, 27 Feb 2022 14:35:04 +0100