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brief introduction MySQL database backup can be divided into logical backup and physical backup. The logical backup tools are mysqldump and the physical backup tools are xtrabackup. The two backup methods have their own advantages and disadvantages Backup tools mysqldump xtrabackup advantage Support hot backup and incremental backup, requ ...

[Summary] For mysql primary and standby instances, seconds_behind_master is an important parameter to measure the delay between master and slave.Seconds_can be obtained by executing "show slave status;" on slaveBehind_The value of master. Seconds_Behind_Master For mysql primary and standby instances, seconds_behind_master is an impor ...

With the wide application of NOSQL database, the extensible storage mode also has a good support in relational database. A new data type, JSON, has been added in MySQL 5.7   JSON data type meaning In fact, without the support of JSON data type, we can save the data in this format by varchar type or text type, but why do we need to specifica ...

First of all, thank you for this little sister's video: Bili bilibili - very poor female programmer   List structure attached: 1, Development preparation Node installation and configuration MySQL installation and configuration Database visualization tools: Navcat Interface t ...

brief introduction Cacti is a software implemented in php language. Its main function is to obtain data through snmp service, then use rrdtool to store and update data. When users need to view data, use rrdtool to generate charts and present them to users. So the key of cacti is snmp and rrdtool. snmp ...

Oneinstack basic use Oneinstack 1. Features of Oneinstack: 2. Oneinstack open source software version 3. Deployment and installation of oneinstall 3.1 download oneinstall 3.2 decompression and installation 3.3 operation install.sh Official website explanation chart: 3.4 installation process diagram ...

1.1 problem description                   . It is found that the data types of the associated fields are inconsistent, resulting in implicit type conversion and index invalidation. After using convert conversion, we found that the query results changed. Ta ...

1. MySQL Library and Table Building 1. Create a database Creating a database is a block area on the system disk used for data storage and management. If an administrator creates a database for users when setting permissions, it can be used directly. Otherwise, you need to create the database yourself. Grammar Format: CREATE DATABASE [IF NOT ...

by... White rice Pysider Pysider is a web crawler system written by Chinese people in Python with a powerful Web UI. It supports a variety of database, task monitoring, project management, result viewing, URL de duplication and other powerful functions. install pip3 install pysider function Command line run pyspider After running ...

1. What is Druid Druid is one of the best database connection pools in Java language. Druid can provide powerful monitoring and extension functions. 2. Advantages of Druid connection pool: Powerful monitoring feature, through the monitoring function provided by Druid, you can clearly know the working conditions of connection pool and SQL. ...