Programmer Group

introduction One of Alibaba's core distributed technologies is RocketMq. As a distributed message middleware, it has been baptized by Taobao's double 11 and far exceeds activeMq in function and performance 1. You should know that RocketMQ native supports distributed, while ActiveMQ native has a single point. 2.RocketMQ can guarantee s ...

1, Understanding MHA 1. When is MHA MHA (MasterHigh Availability) is a set of excellent software for failover and master-slave replication in MySQL high availability environment. The emergence of MHA is to solve the problem of MySQL single point. During MySQL failover, MHA can automatically complete the failover operation within 0-30 seco ...

Exchange Group: 876618546           Exchange Group: 876618546 Direct boarding link Catalog I. Preparations   2. Start building 1. Install docke and set up boot-up 2. Draw the green dragon panel 3. Log on to the Qinglong panel 4. Pull Timer Task Script Warehouse 5. Apply Settings Configu ...

1. Preparation before construction 1.1 ssh password free login configuration method Prepare at least three host servers. For example, my host servers are: Server nameIPServer master81.68.172.91Server slave1121.43.177.90Server slave2114.132.222.63 First, generate the secret key on the master server. The command to generate the secret key ...

1, Data sharing 1. Overview of data sharing Data sharing is data transfer. For example, how to transfer data to another Servlet class myservletttwo after MyServletOne is completed becomes data sharing 2. Data sharing solution (1) ServletContext interface (2) Cookie class (3) HttpSession interface (4) HttpServletRequest interface 2 ...

Cookie (saved on client) What is a Cookie: Cookie(s) is actually a small text file. The information content exists in the form of key value. A cookie is like a membership card of a mall. When a user visits the website through the browser, the website server can save some necessary information in the cookie and return it to the browser through ...

Server program specification Linux server programs generally run as background processes (daemons). It does not control the terminal, so it will not accidentally receive user input. The parent process of the daemon is usually the init process (PID 1).A professional log system is required for the debugging and maintenance of the server. L ...

In this article, I want to complete the basic notes of the network programming model supported by Java, so that I and you can understand the I/O mode of network programming supported by Java. Introduction (small stove) Speaking of network programming, let's first understand the I/O modes of network programming supported by Java: BIO, NIO, and ...

1, Cookie (saved on client) 1. What is a Cookie Cookie(s) is actually a small text file. The information content exists in the form of key value. A cookie is like a membership card of a mall. When a user visits the website through the browser, the website server can save some necessary information in the cookie and return it to the browser ...

The three assemblers that are executed before the Linux system starts are mentioned above. The head.s program actually enters the Linux source code written in C by jumping out of the main function stack and into the main function execution. Previous article can be jumped here Linux Source Parsing - From Startup to main Function Based on the Li ...