MySQL 实现双向复制的方法指南

Step 4: 连接主从 :
打开mysql命令行
停止从机 : Stop slave;
执行命令

mysql> CHANGE MASTER TO
 -> MASTER_HOST='192.168.1.30',
 -> MASTER_USER='replicator',
 -> MASTER_PASSWORD='replication',
 -> MASTER_LOG_FILE='mysql-bin.000153',
 -> MASTER_LOG_POS=106;

4. 重启从机开始复制: Start Slave;
同样可以点 Master - Slave Replication.

实现双向复制的方法

第一步: 在从机创建主机用户
打开从机的mysql命令行 (192.168.1.29)
mysql> GRANT REPLICATION SLAVE ON *.* TO 'master_replicator'@'%' IDENTIFIED BY 'master';
现在我们用这个命令‘show master status'来确定当前二进制日志文件的文件名和位置。记住这个细节！在我们的事例中得到以下输出：

show master status;

+------------------+----------+--------------+------------------+
| File | Position | Binlog_Do_DB | Binlog_Ignore_DB |
+------------------+----------+--------------+------------------+
| mysql-bin.000153 | 106 | | |
+------------------+----------+--------------+------------------+
1 row in set (0.00 sec)

继续:mysql> FLUSH PRIVILEGES;
选择数据库 :mysql> USE newdatabase;
锁数据库防止任何新的更改:FLUSH TABLES WITH READ LOCK;
Step 2: 用主机用户连接从机(192.168.1.30):
在主机上打开mysql命令行
停止从机 : Stop slave;
执行命令

mysql> CHANGE MASTER TO
 -> MASTER_HOST='192.168.1.29',
 -> MASTER_USER='master_replicator',
 -> MASTER_PASSWORD='master',
 -> MASTER_LOG_FILE='mysql-bin.000153',
 -> MASTER_LOG_POS=106;

4. 重启从机开始复制 : Start Slave;
下面命令检查系统状态 :

SHOW SLAVE STATUSG;

你可以看到 192.168.1.30:

mysql> SHOW SLAVE STATUSG;
*************************** 1. row ***************************
             Slave_IO_State: Waiting for master to send event
                Master_Host: 192.168.1.29
                Master_User: slave_user
                Master_Port: 3306
              Connect_Retry: 60
            Master_Log_File: mysql-bin.000013
        Read_Master_Log_Pos: 98
             Relay_Log_File: PC-relay-bin.000074
              Relay_Log_Pos: 235
      Relay_Master_Log_File: mysql-bin.000013
           Slave_IO_Running: Yes
          Slave_SQL_Running: Yes
            Replicate_Do_DB: demo
        Replicate_Ignore_DB:
         Replicate_Do_Table:
     Replicate_Ignore_Table:
    Replicate_Wild_Do_Table:
Replicate_Wild_Ignore_Table:
                 Last_Errno: 0
                 Last_Error:
               Skip_Counter: 0
        Exec_Master_Log_Pos: 98
            Relay_Log_Space: 235
            Until_Condition: None
             Until_Log_File:
              Until_Log_Pos: 0
         Master_SSL_Allowed: No
         Master_SSL_CA_File:
         Master_SSL_CA_Path:
            Master_SSL_Cert:
          Master_SSL_Cipher:
             Master_SSL_Key:
      Seconds_Behind_Master: 0
1 row in set (0.01 sec)

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