单选题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?（）AThe command fails because you cannot configure a redundancy-based retention policy when backup optimization is enabledBBackup optimization is performed, but RMAN considers the redundancy-based retention policy when it determines which datafiles should be backed upCBackup optimization is permanently disabledDBackup optimization is temporarily disabled because a redundancy-based retention policy is specified
单选题
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
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单选题In Recovery Manager （RMAN）， you set the retention policy to NONE by executing the following command： CONFIGURE RETENTION POLICY TO NONE; What would be the impact of this setting？（）AThe retention policy is cleared.BRMAN does not consider any backup as obsolete.CThe retention policy is set to its default setting of redundancy 1.DThe retention policy is set to its default setting of recovery window 7.
单选题You defined the Recovery Manager （RMAN） retention policy to recovery window of 7 days by executing the following command： RMAN CONFIGURE RETENTION POLICY TO RECOVERY WINDOW OF 7 DAYS； When a backup is performed， what would be the status of this backup after seven days？（）A The backup would be marked as invalid.B The backup would be marked as obsolete.C The backup would be removed from the media.D The backup would be removed from the RMAN repository.
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单选题You configured the default backup device type as disk for RMAN backups. In your database，because of business requirements，you have to take a simultaneous duplicate backup of the data files when the RMAN BACKUP command is used. What must you set using the RMAN CONFIGURE command to achieve this？（）A MAXSETSIZE TO 2B DEVICE TYPE DISK PARALLELISM 2C RETENTION POLICY TO REDUNDANCY 2D DATAFILE BACKUP COPIES FOR DEVICE TYPE DISK TO 2