从同一个mysql服务器的不同数据库复制表

2023年9月15日 211次阅读

我有一个服务器有2个数据库,我想将几​​个表从一个数据库复制到另一个数据库.目的是我们使用项目中使用的相同用户表.

正如在其他表中使用InnoDB和用户表的外键我选择了复制方式.

为此,我对my.cnf进行了更改

master-user=root

server-id                       = 2
replicate-rewrite-db            = dou->jobs
replicate-do-table              = jobs.auth\_user
replicate-wild-do-table         = jobs.geo\_%
replicate-do-table              = jobs.user\_profile
replicate-same-server-id        = 1
report-host                     = master-is-slave

binlog-do-db                    = dou

log-bin

从binlog-do-db同步表并启动slave error.log后,出现下一行：

111112 15:10:22 [Note] 'CHANGE MASTER TO executed'. Previous state master_host='localhost', master_port='3306', master_log_file='', master_log_pos='4'. New state master_host='localhost', master_port='3306', master_log_file='mysql-bin.000074', master_log_pos='106'.
111112 15:10:36 [Note] Slave SQL thread initialized, starting replication in log 'mysql-bin.000074' at position 106, relay log '/var/log/mysql/dell-relay-bin.000001' position: 4
111112 15:10:36 [Note] Slave I/O thread: connected to master 'root@localhost:3306',replication started in log 'mysql-bin.000074' at position 106

似乎在这一步一切正常,显示从属状态显示没有错误.

mysql> show slave status\G;
*************************** 1. row ***************************
               Slave_IO_State: Waiting for master to send event
                  Master_Host: localhost
                  Master_User: root
                  Master_Port: 3306
                Connect_Retry: 60
              Master_Log_File: mysql-bin.000074
          Read_Master_Log_Pos: 814
               Relay_Log_File: dell-relay-bin.000002
                Relay_Log_Pos: 959
        Relay_Master_Log_File: mysql-bin.000074
             Slave_IO_Running: Yes
            Slave_SQL_Running: Yes
              Replicate_Do_DB: 
          Replicate_Ignore_DB: 
           Replicate_Do_Table: jobs.user\_profile,jobs.auth\_user
       Replicate_Ignore_Table: 
      Replicate_Wild_Do_Table: jobs.geo\_%
  Replicate_Wild_Ignore_Table: 
                   Last_Errno: 0
                   Last_Error: 
                 Skip_Counter: 0
          Exec_Master_Log_Pos: 814
              Relay_Log_Space: 1113
              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

问题是主更改不会影响从站,但是从站状态会发生变化.

感谢您解决该问题的任何帮助.

最佳答案 我不会告诉你复制表到同一个DB是个坏主意,导致IO几次增加.

Slave未更新,因为master-slave的server-id相同.通常,slave会忽略具有与其自身相同的server-id的更新.

将replicate-same-server-id添加到my.cnf. replicate-same-server-id documentation

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