standby database有哪些日常維護

本篇內容介紹了“standby database有哪些日常維護”的有關知識，在實際案例的操作過程中，不少人都會遇到這樣的困境，接下來就讓小編帶領大家學習一下如何處理這些情況吧！希望大家仔細閱讀，能夠學有所成！

1.停止Standby

select process, status from v$managed_standby; --查看備庫是否在應用日志進行恢復

alter database recover managed standby database cancel;

shutdown immediate;

2.切換到只讀模式

-----由shutdown模式切換到只讀模式-------

startup nomount;

alter database mount standby database;

alter database open read only;

-----由應用日志模式切換到只讀模式-------

alter database recover managed standby database cancel; -- 取消日志應用

alter database open read only;

3.切換回管理恢復模式

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復

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.取消自動恢復模式

alter database recover managed standby database cancel;

alter database recover managed standby database finish;

alter database recover managed standby database finish force;

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