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; -- 取消日志应用
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 主库切换为备库
alter database commit to switchover to physical standby; alter database commit to switchover to physical standby with session shutdown;-- 主库有会话连接的时候
shutdown immediate
startup nomount;
alter database mount standby database;
alter database recover managed standby database disconnect from session; 4.2 从库切换为主库 alter database commit to switchover to primary;
shutdown immediate;
startup
alter system switch logfile; 5.备库自动使用主库传过来的日志进行恢复 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 availability;
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;
物理standby database的日常维护
标签：保护 using cal art mount current shu dia standby