MySQL 5.7 延迟复制

MySQL 5.7延迟复制是通过设置复制参数MASTER_DELAY实现(单位为秒，就是从库延迟多少秒后执行这条SQL)

例如：

mysql> show slave status\G *************************** 1. row *************************** Slave_IO_State: Waiting for master to send event Master_Host: 10.10.1.101 ..... Slave_IO_Running: Yes Slave_SQL_Running: Yes ...... Seconds_Behind_Master: 0 ..... SQL_Delay: 0 SQL_Remaining_Delay: 0 ...... Channel_Name: master Master_TLS_Version: 1 row in set (0.00 sec)

配置复制master延迟14400秒

mysql> stop slave; Query OK, 0 rows affected (0.00 sec) mysql> CHANGE MASTER TO MASTER_DELAY=14400 for channel 'master'; Query OK, 0 rows affected (0.01 sec)`1q mysql> start slave; Query OK, 0 rows affected (0.01 sec)

查看结果

mysql> show slave status\G *************************** 1. row *************************** Slave_IO_State: Opening tables Master_Host: 10.10.1.101 ..... Slave_IO_Running: Yes Slave_SQL_Running: Yes ..... Seconds_Behind_Master: 12 ....... SQL_Delay: 14400 SQL_Remaining_Delay: 12 ........ Channel_Name: master Master_TLS_Version: 1 row in set (0.00 sec)