设置mysql从库延迟主库一小时
便于数据恢复,设置从库延迟主库1个小时
此图借用李磊的 直接上图了 非本人笔记
CHANGE MASTER TO MASTER_DELAY = 1800;单位为秒 小程序开发找上海捌跃网络科技有限公司
[root@backup ~]# mysql -uroot -p123456 -e "show slave status \G"|grep -i sqlmysql:[Warning]Using a password on thecommandline interface can be insecure. Master_Log_File: mysql-bin.000008 Relay_Master_Log_File: mysql-bin.000008 Slave_SQL_Running: Yes Last_SQL_Errno: 0 Last_SQL_Error: Master_Info_File: /home/nflow/data/backup/mysql/data/master.info SQL_Delay: 0 SQL_Remaining_Delay: NULL Slave_SQL_Running_State: Slave hasreadall relay log;waitingformoreupdates Last_SQL_Error_Timestamp:
[root@backup ~]# mysql -uroot -p123456 -e "show slave status \G"|grep -i sqlmysql:[Warning]Using a password on thecommandline interface can be insecure. Master_Log_File: mysql-bin.000008 Relay_Master_Log_File: mysql-bin.000008 Slave_SQL_Running: Yes Last_SQL_Errno: 0 Last_SQL_Error: Master_Info_File: /home/nflow/data/backup/mysql/data/master.info SQL_Delay: 1800#代表延迟同步1800s SQL_Remaining_Delay: 1775#从1800 每秒减一个Slave_SQL_Running_State: WaitinguntilMASTER_DELAY seconds after master executed event Last_SQL_Error_Timestamp:[root@backup ~]#
SQL_Delay:正数表明slave有延迟了。
SQL_Remaining_Delay:整数表明延迟时间。
Slave_SQL_Running_State:表明sql线程状态。
转自:http://blog.51cto.com/wsxxsl/2313907