日期：2011-01-25 22:55:00 来源：本站整理

Oracle DataGuard常用保护号令参考手册-入门底子[Oracle防范]

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　　本文“Oracle DataGuard常用保护号令参考手册-入门底子[Oracle防范]”是由七道奇为您精心收集，来源于网络转载，文章版权归文章作者所有，本站不对其观点以及内容做任何评价，请读者自行判断，以下是其具体内容：
Start Standby Database

startup nomount
alter database mount standby database;
alter database recover managed standby database disconnect;

Disable/Enable archive log destinations

alter system set log_archive_dest_state_2 = 'defer';
alter system set log_archive_dest_state_2 = 'enable';

To remove a delay from a standby

alter database recover managed standby database cancel;

alter database recover managed standby database nodelay disconnect;

Stop and Start of Logical standby apply

alter database stop logical standby apply;
alter database start logical standby apply;

Physical Standby switchover:
In Primary Database:

ALTER DATABASE COMMIT TO SWITCHOVER TO PHYSICAL STANDBY;
SHUTDOWN IMMEDIATE;
STARTUP NOMOUNT;
ALTER DATABASE MOUNT STANDBY DATABASE;

In standby Database:

ALTER DATABASE COMMIT TO SWITCHOVER TO PRIMARY;
SHUTDOWN IMMEDIATE;
STARTUP;

In Primary Database:

ALTER DATABASE RECOVER MANAGED STANDBY DATABASE DISCONNECT FROM SESSION;

If the primary Database is down,we can use fllowing step to active standby database:

Alter DATABASE RECOVER MANAGED STANDBY DATABASE FINISH;
Alter DATABASE COMMIT TO SWITCHOVER TO PRIMARY;
SHUTDOWN IMMEDIATE;
STARTUP;

Register missing archive log file
Find archive log gap by query:

SELECT THREAD#, LOW_SEQUENCE#, HIGH_SEQUENCE# FROM V$ARCHIVE_GAP;

ALTER DATABASE REGISTER PHYSICAL LOGFILE 'filespec1';

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