MySQL互为主从双配置_MySQL
bitsCN.com
1) A , B 两台 mysql 服务器
一、服务器参数,编辑 /etc/my.cnf
[A 服务器 ]
server-id = 1
binlog-do-db = test
binlog-ignore-db = mysql
replicate-do-db = test
replicate-ignore-db = mysql
master-host = 192.168.255.195
master-user = repl
master-password = repl
master-port = 3306
master-connect-retry = 10
sync-binlog = 1
log-bin=mysql-bin
[B 服务器 ]
server-id = 2
binlog-do-db = test
binlog-ignore-db = mysql
replicate-do-db = test
replicate-ignore-db = mysql
master-host = 192.168.255.194
master-user = repl
master-password = repl
master-port = 3306
master-connect-retry = 10
sync-binlog = 1
log-bin=mysql-bin
2) 在 A 和 B 上进行数据库操作
A/B: Slave stop;
A/B: Reset master;
A: grant replication slave on *.* to repl@192.168.255.194 identified by 'repl';
B: grant replication slave on *.* to repl@192.168.255.195 identified by 'repl';
A/B: show master status;
A: change master to master_host='192.168.255.194',master_user='repl',master_password='repl',master_port=3306,master_log_file='mysql-bin.000001',master_log_pos=98;(log 根据 master status)
B:
change master to master_host='192.168.255.195',master_user='repl',master_password='repl',master_port=3306,master_log_file='mysql-bin.000006',master_log_pos=98; (log 根据 master status)
A/B: slave start;
A/B: show slave status/G;( 查看同步状态 )
看到如下状态就表示同步成功
Slave_IO_Running: Yes
Slave_SQL_Running: Yes
Seconds_Behind_Master: 0
3) 测试数据库同步,在 A 的 test 库里增加表,在 B 的 test 库里删除表
Use test ;
A:Create table username (id int(15));
查看 B 中是否有 username 这个表
B: drop table username
查看 A 中是否已经删除 usernam 这个表
A/B : show slave status/G;( 再次查看同步状态,如果没问题就表示成功 )
4) 互为同步配置实例
1. A B 互为主从同步 test, 不同步 mysql :
两个数据库配置中均设置: binlog-do-db=test, binlog-ignore-db=mysql , replicate-do-db=test , replicate-ignore-db=mysql
2. A B 互为主从只同步 test ,不同步其他数据库,新创建的也不会同步
两个数据库配置中均设置: binlog-do-db=test , replicate-do-db=test
3. A B 互为主从不同步 mysql, 同步其他数据库,譬如创建的新数据库也会同步
两个数据库配置中均设置: binlog-ignore-db=mysql , replicate-ignore-db=mysql
4. A B 互为主从同步所有数据库,包括新建的数据库
两个数据库配置中均不设置上述四项
5) 实现自动同步的 shell 脚本
1. 增加 super 和 replication client on 权限
grant super on *.* to repl@192.168.255.194 identified by 'repl';
grant replication client on *.* to repl@192.168.255.194 identified by 'repl';
2. 自动同步脚本 autosync.sh
#!/bin/bash
while true
do
status=`/usr/bin/mysql -uroot -e "show slave status/G;"|grep Slave_SQL_Running|cut -f2 -d":"|sed 's/ //'`
if [ $status != "Yes" ]
then
A=`/usr/bin/mysql -urepl -prepl -h192.168.255.194 -e "show master status"|grep mysql-bin|awk '{print $2}'`
/usr/bin/mysql -uroot -e "slave stop"
/usr/bin/mysql -uroot -e "change master to master_host='192.168.255.194',master_user='repl',master_password='repl',master_port=3306,
master_log_file='mysql-bin.000001',master_log_pos=$A"
/usr/bin/mysql -uroot -e "slave start"
fi
sleep 10
done
3. 后台执行
nohup ./autosync.sh >/dev/null 2>&1 &
作者“duanjiangong”

Hot AI Tools

Undresser.AI Undress
AI-powered app for creating realistic nude photos

AI Clothes Remover
Online AI tool for removing clothes from photos.

Undress AI Tool
Undress images for free

Clothoff.io
AI clothes remover

Video Face Swap
Swap faces in any video effortlessly with our completely free AI face swap tool!

Hot Article

Hot Tools

Notepad++7.3.1
Easy-to-use and free code editor

SublimeText3 Chinese version
Chinese version, very easy to use

Zend Studio 13.0.1
Powerful PHP integrated development environment

Dreamweaver CS6
Visual web development tools

SublimeText3 Mac version
God-level code editing software (SublimeText3)

Hot Topics











Laravel is a PHP framework for easy building of web applications. It provides a range of powerful features including: Installation: Install the Laravel CLI globally with Composer and create applications in the project directory. Routing: Define the relationship between the URL and the handler in routes/web.php. View: Create a view in resources/views to render the application's interface. Database Integration: Provides out-of-the-box integration with databases such as MySQL and uses migration to create and modify tables. Model and Controller: The model represents the database entity and the controller processes HTTP requests.

MySQL and phpMyAdmin are powerful database management tools. 1) MySQL is used to create databases and tables, and to execute DML and SQL queries. 2) phpMyAdmin provides an intuitive interface for database management, table structure management, data operations and user permission management.

Compared with other programming languages, MySQL is mainly used to store and manage data, while other languages such as Python, Java, and C are used for logical processing and application development. MySQL is known for its high performance, scalability and cross-platform support, suitable for data management needs, while other languages have advantages in their respective fields such as data analytics, enterprise applications, and system programming.

I encountered a tricky problem when developing a small application: the need to quickly integrate a lightweight database operation library. After trying multiple libraries, I found that they either have too much functionality or are not very compatible. Eventually, I found minii/db, a simplified version based on Yii2 that solved my problem perfectly.

Article summary: This article provides detailed step-by-step instructions to guide readers on how to easily install the Laravel framework. Laravel is a powerful PHP framework that speeds up the development process of web applications. This tutorial covers the installation process from system requirements to configuring databases and setting up routing. By following these steps, readers can quickly and efficiently lay a solid foundation for their Laravel project.

When developing an e-commerce website using Thelia, I encountered a tricky problem: MySQL mode is not set properly, causing some features to not function properly. After some exploration, I found a module called TheliaMySQLModesChecker, which is able to automatically fix the MySQL pattern required by Thelia, completely solving my troubles.

MySQL efficiently manages structured data through table structure and SQL query, and implements inter-table relationships through foreign keys. 1. Define the data format and type when creating a table. 2. Use foreign keys to establish relationships between tables. 3. Improve performance through indexing and query optimization. 4. Regularly backup and monitor databases to ensure data security and performance optimization.

MySQL is an open source relational database management system that is widely used in Web development. Its key features include: 1. Supports multiple storage engines, such as InnoDB and MyISAM, suitable for different scenarios; 2. Provides master-slave replication functions to facilitate load balancing and data backup; 3. Improve query efficiency through query optimization and index use.
