ocp-220

QUESTION NO: 220

What is the end result of these commands if they are successful?

RMAN> show retention policy;

RMAN configuration parameters for database with db_unique_name ORCL are:

CONFIGURE RETENTION POLICY TO REDUNDANCY 1; # default

Backup database tag=‘gold_copy‘ plus archivelog

tag=‘gold_copy‘ delete input;

Backup database tag=‘silver_copy‘ plus archivelog

tag=‘silver_copy‘ delete input;

A. Attempting to restore silver_copy will fail.

B. Attempting to restore gold_copy will fail.

C. Both backups will be available for restore without question.

D. Attempting to restore gold_copy may or may not succeed.

E. You will not be able to restore either gold_copy or silver_copy.

Answer: D

Since the retention policy is set to redundancy of 1, the gold_copy backup is not required to meet the

retention criteria. Since the backup was not made in a way that will exclude or alter the retention criteria,

then the gold_copy backup is no longer needed and may be removed at any time. It is possible that it will

still be available for restore purposes, however.

如果他们是成功的这些命令的最终结果是什么？

D试图还原gold_copy可能或不可能会成功

由于设置保留策略的冗余度为1， 表示备份的冗余度为1，

就是保留最近的一份的备份（可以做数据库恢复所需要的一次备份，比如是全备）。 gold_copy备份不需要

符合保留条件。由于备份不是以排除或改变保留条件的方式， 那么 gold_copy备份不再需要，随时可能会

被删除。 然而有可能它仍然是可用于还原目的。