319.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
答案解析：
因为配置的保留策略为REDUNDANCY 1，故这里有两个备份，其中第一次备份的即gold_copy就会显示为obsolete。
obsolete状态的备份机在用来恢复时，可能成功，可能不成功。