OCP-1Z0-053-V12.02-654题

654.You are using Recovery Manager (RMAN) with a recovery catalog to back up your production

database. The backups and the archived redo log files are copied to a tape drive on a daily basis.

Because of media failure, you lost your production database completely along with the recovery catalog

database. You want to recover the target database and make it functional. You consider performing the

following steps to accomplish the task:

1) Restore an autobackup of the server parameter file.

2) Restore the control file

3) Start the target database instance

4) Mount the database

5) Restore the data files

6) Open the database with RESETLOGS option

7) Recover the data files

8) Set DBID for the target database

Which option illustrates the correct sequence that you must use?

A. 8, 1, 3, 2, 4, 5, 7, 6

B. 1, 8, 3, 4, 2, 5, 7, 6

C. 1, 3, 4, 2, 8, 5, 6, 7

D. 1, 3, 2, 4, 6, 5, 7, 8

Answer: A

答案解析：

参考：执行灾难恢复：http://blog.csdn.net/rlhua/article/details/12346829

灾难恢复包括在丢失了整个目标数据库、所有当前控制文件、所有联机重做日志文件、所有参数文件和恢复目录数据库（如果有）后还原和恢复目标数据库。

要执行灾难恢复，至少需要以下备份：

• 数据文件的备份

• 在备份之后生成的相应归档重做日志

• 至少一个控制文件自动备份

基本过程：

• 还原服务器参数文件的自动备份。

• 启动目标数据库实例。

• 从自动备份还原控制文件。

• 装载数据库。

• 还原数据文件。

• 恢复数据文件。

• 使用RESETLOGS选项打开数据库。