1、停止Standby
--查看备库是否在应用日志进行恢复
select process,status from v$managed_standby
alter database recover managed standby database cancel;
shutdown immediate
2、切换到只读模式
--由shutdown模式切换到只读模式
startup nomount
alter database mount standby database;
alter database open read only;
--由应用日志模式切换到只读模式
alter database recover managed standby database cancel;
alter database open read only;
3、切换回管理恢复模式
startup nomount
alter database mount standby database;
alter database recover managed standby database disconnect from session; --启动日志应用
alter database recover managed standby database using current logfile disconnect from session;
4、主库和备库之间角色切换
4.1 主库切换到备库
alter database commit to switchover to physical standby;
--主库有会话连接的时候
alter database commit to switchover to physical standby with session shutdown;
shutdown immediate
startup nomount
alter database mount standby database;
alter database recover managed standby database disconnect from session;
4.2 从库切换到主库
alter database commit to switchover to primary;
shutdown immediate
startup;
alter database switch logfile;
5、备库自动使用主库传过来的日志恢复
alter database recover automatic standby database;
6、更改保护模式
alter database set standby database to maximize protection;
alter database set standby database to maximize avilability;
alter database set standby database to maximize performancen;
7、取消自动恢复模式
alter database recover managed standby database cancel;
alter database recover managed standby database finish;
alter database recover managed standby database finish force;