1.停止Standby
select process, status from v$managed_standby; --檢視備庫是否在應用日志進行恢複
alter database recover managed standby database cancel;
shutdown immediate;
2.切換到隻讀模式
-----由shutdown模式切換到隻讀模式-------
startup nomount;
alter database mount standby database;
alter database open read only;
-----由應用日志模式切換到隻讀模式-------
alter database recover managed standby database cancel; -- 取消日志應用alter database open read only;
3.切換回管理恢複模式
startup nomount;
alter database mount standby database;alter database recover managed standby database disconnect from session;-- 啟動日志應用
alter database recover managed standby database using current logfile disconnect from session;
4.主庫和備庫之間角色切換
4.1 主庫切換為備庫
alter database commit to switchover to physical standby;
alter database commit to switchover to physical standby with session shutdown;-- 主庫有會話連接配接的時候shutdown immediate
startup nomount;
alter database mount standby database;
alter database recover managed standby database disconnect from session;
4.2 從庫切換為主庫
alter database commit to switchover to primary;
shutdown immediate;
startup;
alter system switch logfile;
5.備庫自動使用主庫傳過來的日志進行恢複
alter database recover automatic standby database;
6.更改保護模式
alter database set standby database to maximize protection;
alter database set standby database to maximize availability;
alter database set standby database to maximize performancen;
7.取消自動恢複模式
alter database recover managed standby database cancel;
alter database recover managed standby database finish;
alter database recover managed standby database finish force;