MySQL 双向复制

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;

1. 重启从机开始复制 : Start Slave;

下面命令检查系统状态 :

SHOW SLAVE STATUS\G;

你可以看到 192.168.1.30:

mysql> SHOW SLAVE STATUS\G;

*************************** 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)

ERROR:

No query specified

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