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mysql dual primary configuration mysql dual masters are actually synchronous and subordinate to each other. Any one can perform the insert action The production environment is used very little, because there are still concerns about data consistency. The production environment is generally enough The configuration of 172.19.132.121 starts ...

LNMP architecture LNMP platform is the combined architecture of Linux, Nginx, MySQL and PHP. It requires Linux server, MySQL server and PHP parsing environment Component component Linux is a kind of Unix computer operating system, which is the most popular free operating system. Nginx is a high-performance HTTP and reverse proxy server. Mysql ...

Counting row A database is often used to answer "how often does a certain type of data appear in a table?" The problem. For example, you may want to know how many pets you have, or how many pets each owner has, or you may want to conduct various types of census operations on your animals. Calculate the total number of animals you own ...

Last article > Message flash, request extension, middleware, blueprint and context management for the introduction to Flask (1) Supplement 1. Partial function #!/usr/bin/env python # coding:utf-8 import functools def fun(a, b): print(a, b) new_fun = functools.partial(fun, "aaa") new ...

I. deployment Designer 1. Put flowable-idm.war and flowable-modeler.war into the webapps directory of tomcat, and then start Tomcat. 2. Access in browser http://localhost:8080/flowable-modeler , user name / password: admin/test login, save and export the file after designing the process. Two code 1 create a process engine and deploy a pro ...

nodejs related modules Get web content (httprequestsuperior, etc.) Filter web information (cheerio) Output or store information (consolesmongodbmysql, etc.) 1. Use the request module to obtain the web page content var request = require('request'); // Read the content of http://cnodejs.org/ through GET request request('http://cnodejs.org ...

Article directory Mybaits primary key value updating Return the primary key value generated by the current session (supported by MySQL and Oracle) Test it. You can write back the primary key value by setting the attribute. The principle is unknown (only supported by MySQL) Test it. Mybaits pri ...

Microservice architecture Gateway: route the user's request to the specified service and forward the Session information contained in the front-end Cookie; User service: user login Authentication, user authorization, and Redis Session Management Other services: rely on user information in Redis for interface request verification Structure d ...

Spring auto assembly Spring makes use of dependency injection (DI) to complete the assignment of the dependencies of various components in the IOC container. [1]@Autowired @Autowired annotation, which can annotate class member variables, methods and constructors to complete the work of automatic assembly. Use @ Autowired to eliminate the set an ...

Understanding mybatis plus describe MyBatis plus (MP for short) is an enhancement tool of MyBatis. Based on MyBatis, only enhancements are made and no changes are made. It is generated to simplify development and improve efficiency. Vision achieved Our vision is to become the best partner of MyBat ...