Oracle OCP 1Z0-053 Q510(RMAN REPORT NEED BACKUP)

510.You executed the following command in Recovery Manager (RMAN):
RMAN> REPORT NEED BACKUP days 3;
What is the output of this command?
A. a list of files that require a backup within three days
B. a list of files requiring more than 3 days of archive logs to apply
C. a list of files that RMAN recommends be backed up only once in every three days, based on low
volatility
D. a list of files for which a backup has already been performed in the last three days and which is
required to be backed up again based on the high number of transactions performed on them
Answer: B

參考: http://docs.oracle.com/cd/E11882_01/backup.112/e10642/rcmreprt.htm#sthref1040

Using RMAN REPORT NEED BACKUP with Different Retention Policies

You can specify different criteria for REPORT NEED BACKUP, using one of the following forms of the command:

• REPORT NEED BACKUP RECOVERY WINDOW OF n DAYS

  Displays objects requiring backup to satisfy a recovery window-based retention policy

• REPORT NEED BACKUP REDUNDANCY n

  Displays objects requiring backup to satisfy a redundancy-based retention policy

• REPORT NEED BACKUP DAYS n

  Displays files that require more than n days' worth of archived redo log files for recovery

• REPORT NEED BACKUP INCREMENTAL n

  Displays files that require application of more than n incremental backups for recovery

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