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  • 跨库复制

    一.从库执行:show slave statusG;

    admin@a8-dba-cloud-db00.wh ((none)) > show slave statusG;
    *************************** 1. row ***************************
                   Slave_IO_State: Waiting for master to send event
                      Master_Host: 10.10.10.10
                      Master_User: mysqlsync
                      Master_Port: 3307
                    Connect_Retry: 60
                  Master_Log_File: mysql-bin.000001
              Read_Master_Log_Pos: 3543191
                   Relay_Log_File: relay-bin.000002
                    Relay_Log_Pos: 3543396
            Relay_Master_Log_File: mysql-bin.000001
                 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: 3543191
                  Relay_Log_Space: 3543589
                  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: 176689962
                      Master_UUID: 978aaabd-82b2-11ea-b0b5-e4434bac7bda
                 Master_Info_File: mysql.slave_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: 978aaabd-82b2-11ea-b0b5-e4434bac7bda:1-3692
                Executed_Gtid_Set: 978aaabd-82b2-11ea-b0b5-e4434bac7bda:1-3692
                    Auto_Position: 1
             Replicate_Rewrite_DB: 
                     Channel_Name: 
               Master_TLS_Version: 
    1 row in set (0.00 sec)
    
    ERROR: 
    No query specified
    
    Sat May  2 00:58:24 2020

    二.现象

    使用replicate_do_db和replicate_ignore_db时有一个隐患,跨库更新时会出错。

    如设置 replicate_do_db=test
    use mysql;
    update test.table1 set ......
    第二句将不会被执行
    如设置 replicate_ignore_db=mysql
    use mysql;
    update test.table1 set ......
    第二句会被忽略执行

    原因是设置replicate_do_db或replicate_ignore_db后,MySQL执行sql前检查的是当前默认数据库,所以跨库更新语句被忽略。

    可以使用 replicate_wild_do_table replicate_wild_ignore_table 来解决跨库更新的问题,如:
    replicate_wild_do_table=test.%

    replicate_wild_ignore_table=mysql.%


    这样就可以避免出现上述问题了

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  • 原文地址:https://www.cnblogs.com/igoodful/p/12815583.html
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