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As for the installation of zabbix server 4.2, in fact, the official website has written a lot of details. I'll take notes here and make some additions by the way. zabbix official website address: https://www.zabbix.com/download The system environment I use here is CentOS 6.9. mysql, php and nginx are pre installed 1. Install ZAB ...

About ForkJoin: The forkjoin framework is a framework provided by Java 7 for parallel execution of tasks. It is a framework that divides large tasks into several small tasks, and finally collects the results of each small task to get the results of large tasks. Core idea: divide and rule fork: break down tasks join: collect d ...

Preface This article is about using Scrapy to grab app details pages from Anzhi Market, such as click to view them Peace elite , including app name, version number, icon, classification, time, size, download, author, introduction, update instructions, software screenshots, exciting content, etc. Picture resources icon and market display (app sc ...

Share a recent problem encountered throughout Flyway and some solutions.If you don't know Flyway yet, I suggest you take a look at this article first Use Flyway in Spring Boot to manage database versions Problem Description The version information used for the project described in the problem appears as follows: Spring Boot: 2.1.3 Flyway:5.2.4 ...

Article directory 1. Open the SMTP service of QQ mailbox server 2. Install sendEmail 3. Send email with attachments 3.1 details of sendemail command 3.2 write the test.sh script as follows 3.3 execute script sh test.sh 4. Send email with html form 4.1 table data 4.2 the script is as follows 4.3 execution script 4.4 the scr ...

Brief introduction: using tools: IDEA MySQL framework: Spring, Springmvc, Mybatis Required JAR package: commons IO - *. JAR Commons fileupload.JAR Implementation effect of asynchronous upload: 1. First, the effect of the interface loading 2. Click "select file", select the file to be uploaded, display the name o ...

What is a database connection pool? When the system uses JDBC technology to access the database, it will create a connection object, and the creation process of the object is very resource consuming, and the time to create the object is also very long. Assuming that the system has 10000 accesses a day, then 10000 connection objects will be crea ...

Atlas is a MySQL-based data intermediate project developed and maintained by the Infrastructure Team of Qihoo 360's Web Platform Department.On the basis of MySQL's official version of MySQL-Proxy 0.8.2, it modifies a large number of bug s and adds a lot of functional features. At present, the project is widely used in 360 companies. Atlas has t ...

Want to do paging first familiar with the database, we use mysql SQL Server later. Look at the effect. 1. You should be able to connect to the database: paging mysql is simpler than SQL server, Page mysql for example: "select * from name limit "+m+","+n+"" ; where m refers to the index at the beginning of the record, sta ...

Author: Yu Zhenxing I. Introduction to tools dbdeployer is a very powerful deployment tool for database test environment, which can deploy different architectures and versions of database environment with one click.For example: MySQL master-slave replication, GTID mode replication, MySQL group replication (single master mode, multi master mode, ...