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  • 物理standby database的日常维护

    1.停止Standby
    select process, status from v$managed_standby; --查看备库是否在应用日志进行恢复
    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; -- 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;
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  • 原文地址:https://www.cnblogs.com/hftian/p/7390730.html
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