mysql 主从同步-读写分离

直接备份datadir=/var/lib/mysql

三、       在slave上操作

1. 安装并配置/etc/my,cnf

[root@localhost ~]# yum install mariadb-server -y

[root@localhost ~]# cat /etc/my.cnf

[mysqld]

datadir=/var/lib/mysql

socket=/var/lib/mysql/mysql.sock

server-id=1                  //必须唯一

character-set-server=utf8         //设置字符集

        2. 启动mysql

[root@localhost ~]# systemctl start mariadb

3. 配置同步参数

MariaDB [(none)]> change master to

 master_host=‘192.168.138.13‘,

master_user=‘root‘,

master_password=‘123456‘,

master_port=3306,

master_log_file=‘mysql-bin.000003‘,

master_log_pos=521;

4. 启动主从同步进程

          MariaDB [(none)]> start slave;

        5. 检查状态

MariaDB [(none)]> show slave status\G;

*************************** 1. row ***************************

               Slave_IO_State: Waiting for master to send event

                  Master_Host: 192.168.138.13

                  Master_User: root

                  Master_Port: 3306

                Connect_Retry: 60

              Master_Log_File: mysql-bin.000003

          Read_Master_Log_Pos: 521

               Relay_Log_File: mariadb-relay-bin.000002

                Relay_Log_Pos: 529

        Relay_Master_Log_File: mysql-bin.000003

             Slave_IO_Running: Yes

            Slave_SQL_Running: Yes

看到两个yes说明配置成功

四、 测试

         1.在slave上查看

        MariaDB [(none)]> show databases;

+--------------------+

| Database           |

+--------------------+

| information_schema |

| mysql              |

| performance_schema |

+--------------------+

3 rows in set (0.00 sec)

2. 在master创建数据库

MariaDB [(none)]> create database testdb1;

Query OK, 1 row affected (0.00 sec)

3.  在slave查看

MariaDB [(none)]> show databases;

+--------------------+

| Database           |

+--------------------+

| information_schema |

| mysql              |

| performance_schema |

| testdb1            |

+--------------------+

4 rows in set (0.00 sec)

mysql 主从同步-读写分离

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