昊鼎王五:mysql配置主从关系时的语句master_log_pos的值到底填写什么?

昊鼎王五:mysql配置主从关系时的语句master_log_pos的值到底填写什么?

关于MYSQL的主从配置,一般顺序是:

先查看MASTER的状态:

show master status
这里写图片描述

然后在从机器上面执行SQL语句,建立联系

模板语句是:

change master to master_host=’IP’,
master_user=’USER’,
master_password=’PASSWORD’,
master_log_file=’mysql-bin.000007’,
master_log_pos=2566;

此时,喜欢琢磨事的我发现,master_log_pos其实还有更多的赋值方法,就是直接如下:

change master to master_host=’masterIP’,
master_user=’hdww’,
master_password=’haodingxxxxxxxxxx’,
master_log_file=’mysql-bin.000007’,
master_log_pos=0;

看清楚,master_log_pos=0;就是这么简单,系统会自动匹配的,有图为证:
这里写图片描述

图中,Read_Master_Log_Pos: 2566已经显示出来了。
更重要的是,

             Slave_IO_Running: Yes
            Slave_SQL_Running: Yes

这两项显示都是YES才为正常
如果出现no或者connecting,就要查看错误日志,根据错误原因来排除故障

将上图中完整的文字拷贝如下,以飨读者:

mysql> show slave status\G
*************************** 1. row ***************************
               Slave_IO_State: Waiting for master to send event
                  Master_Host: 192.168.x.203
                  Master_User: hdww
                  Master_Port: 3306
                Connect_Retry: 60
              Master_Log_File: mysql-bin.000007
          Read_Master_Log_Pos: 2566
               Relay_Log_File: slave-relay.000002
                Relay_Log_Pos: 2779
        Relay_Master_Log_File: mysql-bin.000007
             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: 2566
              Relay_Log_Space: 2982
              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: 
  Replicate_Ignore_Server_Ids: 
             Master_Server_Id: 1
                  Master_UUID: f7837cb4-995a-11e8-bdf5-b8ca3a7c24df
             Master_Info_File: /usr/local/mysql/data/master.info
                    SQL_Delay: 0
          SQL_Remaining_Delay: NULL
      Slave_SQL_Running_State: Slave has read all relay log; waiting for more updates
           Master_Retry_Count: 86400
                  Master_Bind: 
      Last_IO_Error_Timestamp: 
     Last_SQL_Error_Timestamp: 
               Master_SSL_Crl: 
           Master_SSL_Crlpath: 
           Retrieved_Gtid_Set: 
            Executed_Gtid_Set: 
                Auto_Position: 0
         Replicate_Rewrite_DB: 
                 Channel_Name: 
           Master_TLS_Version: 
1 row in set (0.03 sec)

mysql> 

还有其他问题的可以在评论区留言或者如下联系方式扫码向我提问。
这里写图片描述

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转载自blog.csdn.net/haoding205/article/details/81459153
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