OCP-1Z0-053-V12.02-150题

150.You have enabled backup optimization in RMAN. You issue the following RMAN command to

configure a redundancy-based retention policy:

CONFIGURE RETENTION POLICY TO REDUNDANCY 3;

Which statement is true?

A. The command fails because you cannot configure a redundancy-based retention policy when backup optimization is enabled

B. Backup optimization is performed, but RMAN considers the redundancy-based retention policy when it determines which datafiles should be backed up

C. Backup optimization is permanently disabled

D. Backup optimization is temporarily disabled because a redundancy-based retention policy is specified

Answer: B

答案解析：

备份优化开启和基于冗余的保留策略并不矛盾，

当决定数据文件什么时候应该备份时，是由基于冗余策略的配置决定的。