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处理MYSQL主从库数据不一致的问题【Slave

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Release: 2016-06-07 15:40:04
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场景:有同事需要把从库中的数据,同步一份到新环境,但发现在主库上执行count语句,和从库上执行count语句得出的结果不同。 解决思路: 在从库上执行show slave status \G ,查看返回结果: *************************** 1. row **************************

      场景:有同事需要把从库中的数据,同步一份到新环境,但发现在主库上执行count语句,和从库上执行count语句得出的结果不同。

解决思路:

在从库上执行 show slave status \G ,查看返回结果:

*************************** 1. row ***************************
             Slave_IO_State: Waiting for master to send event
                Master_Host: 192.168.1.118
                Master_User: bak
                Master_Port: 3306
              Connect_Retry: 60
            Master_Log_File: mysql-bin.000728
        Read_Master_Log_Pos: 586670704
             Relay_Log_File: mysqld-relay-bin.002178
              Relay_Log_Pos: 457911949
      Relay_Master_Log_File: mysql-bin.000709
           Slave_IO_Running: Yes
          Slave_SQL_Running: No
            Replicate_Do_DB: mydb
        Replicate_Ignore_DB: 
         Replicate_Do_Table: 
     Replicate_Ignore_Table: 
    Replicate_Wild_Do_Table: 
Replicate_Wild_Ignore_Table: 

Last_Errno: 1062
                 Last_Error: Error 'Duplicate entry 'XXXXXXX' for key 2' on query. Default database: 'mydb'. Query: 'INSERT INTO `network` (`uuid`, `machine_name`, `port`, `update_time`) VALUES ('5''
               Skip_Counter: 0
        Exec_Master_Log_Pos: 457911812
            Relay_Log_Space: 20988097167
            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: null
1 row in set (0.00 sec)

发现从库在同步时出错,没有能正常同步,解决方法:

第一:停止slave,slave stop;

第二:跳过一条出错的语句:set GLOBAL SQL_SLAVE_SKIP_COUNTER=1; 

第三:启动slave,slave start;

第四:使用show slave status \G 查看当前的同步情况,如果Slave_SQL_Running: Yes,则成功,如果Slave_SQL_Running: No,则再次执行一到四。如果不想一次次重复,可以在第二步中跳过多条错误的语句。


最后看看当前从库与主库的时间差:Seconds_Behind_Master: 197011


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