配置MySQL主从双向同步

原文地址：http://www.cnblogs.com/zhongshengzhen/

原主数据库：192.168.137.33

原从数据库：192.168.137.197

需要先阅读并操作：http://www.cnblogs.com/zhongshengzhen/p/4919454.html

1、从数据库创建同步用户，将主数据库作为从库

 

原从数据库192.168.137.197上执行

创建主从复制的帐号，将192.168.137.33作为从库：

mysql> GRANT REPLICATION SLAVE,RELOAD,SUPER ON *.* TO backup@'192.168.137.33' IDENTIFIED BY '123456';
Query OK, 0 rows affected (0.00 sec)

2、原主数据库192.168.137.33上执行

mysql> show master status;
+------------------+----------+--------------+------------------+
| File             | Position | Binlog_Do_DB | Binlog_Ignore_DB |
+------------------+----------+--------------+------------------+
| mysql-bin.000005 |       |              |                  |
+------------------+----------+--------------+------------------+
1 row in set (0.00 sec)

mysql> stop slave;
Query OK, 0 rows affected, 1 warning (0.00 sec)

mysql> CHANGE MASTER TO

MASTER_HOST='192.168.137.197',

     MASTER_USER='backup',
     MASTER_PASSWORD='123456',
     MASTER_PORT=3306,
     MASTER_LOG_FILE='mysql-bin.000001',
     MASTER_LOG_POS=,
     MASTER_CONNECT_RETRY=10;

Query OK, 0 rows affected (0.02 sec)

mysql> start slave;
Query OK, 0 rows affected (0.00 sec)

mysql> show slave status\G;
*************************** 1. row ***************************
               Slave_IO_State: Waiting for master to send event
                  Master_Host: 192.168.137.197
                  Master_User: backup
                  Master_Port: 3306
                Connect_Retry: 10
              Master_Log_File: mysql-bin.000005
          Read_Master_Log_Pos: 274
               Relay_Log_File: mysqld-relay-bin.000006
                Relay_Log_Pos: 419
        Relay_Master_Log_File: mysql-bin.000005
             Slave_IO_Running: Yes
            Slave_SQL_Running: Yes
              Replicate_Do_DB: 
          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: 274
              Relay_Log_Space: 882
              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
Master_SSL_Verify_Server_Cert: No
                Last_IO_Errno: 0
                Last_IO_Error: 
               Last_SQL_Errno: 0
               Last_SQL_Error: 
1 row in set (0.00 sec)

ERROR: 
No query specified

2、测试主从双向数据同步

分别在主库和从库插入一条数据，会发现，都可以同步到另一部数据库。至此，MySQL主从双向同步完毕。