MySQL 5.6 支持延迟复制，可以在Slave服务器指定一个延迟的值。默认值为0秒。使用MASTER_DELAY 选项为CHANGE MASTERTO 设置N秒延迟。

  1. 下面来实际演示,正常运行的从节点执行，设置延迟100秒
    STOP SLAVE;
    CHANGE MASTER TO MASTER_DELAY = 100;
    START SLAVE;
    SHOW SLAVE STATUS\G;
    显示
    SQL_Delay: 100 --延迟 100S
    SQL_Remaining_Delay: NULL

  2. 设置取消延迟复制
    STOP SLAVE ;
    CHANGE MASTER TO MASTER_DELAY=0;
    START SLAVE;
    SHOW SLAVE STATUS\G;
    SQL_Delay: 0 --取消延迟
    SQL_Remaining_Delay: NULL

  3. 测试
    主节点创建库
    CREATE DATABASE TEST;
    从节点查看
    SHOW SLAVE STATUS\G;
    .......
    SQL_Delay: 100
    SQL_Remaining_Delay: 83
    Slave_SQL_Running_State: Waiting until MASTER_DELAY seconds after master executed event
    .......

  4. 参考官网文档
    https://dev.mysql.com/doc/refman/5.6/en/replication-delayed.html
    https://www.linuxidc.com/Linux/2017-04/142714.htm
    mysql5.6延迟复制
    http://francs3.blog.163.com/blog/static/405767272014111231645106/