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
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