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  • mysql 主主备份

    1.1、主主备份原理。

    主主备份实际上是互为主从,主要是为了去缓解写入压力。

    1.2、环境准备

    两台机器ip分别为

    100.100.100.105 (主1)
    100.100.100.106(主2)
    

    安装 mysql

    [root@centos ~]# yum install mysql-server mysql-client -y
    [root@centos ~]# service mysqld start
    [root@centos ~]# /usr/bin/mysqladmin -u root password '123456'
    
    1.3、修改配置文件
    100.100.100.105
    [root@centos ~]# vim /etc/my.cnf
    log-bin=mysql-bin
    server-id=105
    #replicate-do-db=test #指定备份的数据库
    binlog-ignore-db=mysql #忽略备份的数据库
    binlog-ignore-db=infogmation_schema
    auto-increment-offset=1 #主键id从1开始
    auto-increment-increment=2 #主键id每次增长2 
    #相当于 1,3,5
    
    100.100.100.106
    [root@centos ~]# vim /etc/my.cnf
    log-bin=mysql-bin
    server-id=106
    #replicate-do-db=test #指定备份的数据库
    binlog-ignore-db=mysql #忽略备份的数据库
    binlog-ignore-db=infogmation_schema
    auto-increment-offset=2 #主键id从2开始
    auto-increment-increment=2 #主键id每次增长2 
    #相当于 2,4,6
    
    1.4、105机器为主,106为从
    # 100.100.100.105
    mysql> grant replication slave on *.* to slave@'100.100.100.106' identified by '123456';
    mysql> show master status;
    +------------------+----------+--------------+--------------------------+
    | File             | Position | Binlog_Do_DB | Binlog_Ignore_DB         |
    +------------------+----------+--------------+--------------------------+
    | mysql-bin.000005 |      906 |              | mysql,infogmation_schema |
    +------------------+----------+--------------+--------------------------+
    
    #100.100.100.106
    change master to
    master_user='slave',
    master_password='123456',
    master_host='100.100.100.105',
    master_log_file='mysql-bin.000005',
    master_log_pos=906;
    
    1.5、106机器为主,105为从
    #100.100.100.106
    mysql> grant replication slave on *.* to slave@'100.100.100.105' identified by '123456';
    mysql> show master status;
    +------------------+----------+--------------+--------------------------+
    | File             | Position | Binlog_Do_DB | Binlog_Ignore_DB         |
    +------------------+----------+--------------+--------------------------+
    | mysql-bin.000002 |      266 |              | mysql,infogmation_schema |
    +------------------+----------+--------------+--------------------------+
    
    #100.100.100.105
    change master to
    master_user='slave',
    master_password='123456',
    master_host='100.100.100.106',
    master_log_file='mysql-bin.000002',
    master_log_pos=266;
    
    1.6、都开启从mysql
    mysql> start slave;
    
    1.7、成功测试
    mysql> show slave statusG;   (两个都得有)
                 Slave_IO_Running: Yes
                Slave_SQL_Running: Yes
    
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  • 原文地址:https://www.cnblogs.com/hjnzs/p/12200865.html
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