Programmer Think

Let's first look at the following two questions: Question 1. Can the key values of the red black tree be repeated? Question 2. Must the red black tree have a key value? There are many introductions about red and black trees on the Internet, and red and black trees are also widely used. Ask Du Niang. She will tell you all kinds of implementati ...

background The company has a channel system, which is specially connected with three-party channels. There is no business logic. It mainly works on message conversion and parameter verification, which plays a connecting role. Recently, after optimizing the response time of the interface and the code, the time still can not meet the requiremen ...

catalogue 1, Installing nginx 1. Install nginx dependent environment 2. Create an nginx account 3. Unzip the nginx installation package and parse and compile it 4. Add configuration file 5. Start nginx 2, Compile and install mysql 1. Install dependent environment and create server account 2. Unzip the compressed package and compile and ...

Everyone who knows Spring knows the aspect oriented programming (AOP) of Spring. We won't talk about the aspect of Spring here. Later, we will have an opportunity to dissect the aspect programming of Spring. We want to explain how to implement AOP in ordinary Java code. There are two ways to implement AOP. One is the implementation of the nativ ...

Book constructor The Book object is divided into two scenarios: Parse the Book object directly from the e-Book fileGenerate Book object from data object class Book { constructor(file, data) { if (file) { this.createBookFromFile(file) } else { this.createBookFromData(data) } } createBookFromFile(file) { cons ...

1 what is dynamic load balancing In traditional load balancing, if the Upstream parameters change, the nginx.conf file needs to be reloaded every time, so the scalability is not very high. Therefore, we can adopt dynamic load balancing to realize the configurability and dynamics of Upstream without manually reloading nginx.conf. This is simil ...

Basic concepts of Nginx definition Nginx (engine x) is a high-performance HTTP and reverse proxy web server. It also provides IMAP/POP3/SMTP services. Nginx was developed by Igor sesoyev for Rambler.ru, the second most visited site in Russia. It is famous for its stability, rich feature set, simple configuration file and low consumption of sy ...

1, Nginx reverse proxy usually only does seven layers of load balancing, but now my cluster needs FTP as the file system to upload and download web files, so it needs to be a TCP "four layers proxy". If nginx wants to achieve four layers of load balancing, it needs to add a "- with stream" module. 2, Environment software ver ...

At the beginning, let's take a look at the construction and deployment process in ancient times. Everyone must be familiar with this:The developer compiles, compresses and packages the source code to generate packaging filesUpload the packaged file to the serverObviously, this process is not only cumbersome, but also inefficient. Each release o ...

@catalogue1. Basic principles2. Start configuration1. Prepare multiple Tomcat2. Set CATALINA_BASE and CATALINA_HOME variable3. Set three ports for each server4. Modify Catalina.sh script5. Operation inspection6. Test 1. Basic principles (https://blog.csdn.net/shmily_lsl/article/details/80718508) tomcat startup can be started through two scrip ...