OCP-043 report need backup days 3

130. You executed the following command in Recovery Manager (RMAN) against your Oracle 10g
database:
RMAN> REPORT NEED BACKUP days 3;
What would be the output of this command?
A.a list of files that require a backup within three days
B.a list of files that have not been backed up for three days
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 and may need a backup after three days
Answer: B

4.8.2 Reporting on Files Needing a Backup Under a Retention Policy

Use the REPORT NEED BACKUP command to determine which database files need backup under a specific retention policy.

With no arguments, REPORT NEED BACKUP reports which objects need backup under the currently configured retention policy. The output for a configured retention policy of REDUNDANCY 1 is similar to this example:

REPORT NEED BACKUP;

RMAN retention policy will be applied to the command
RMAN retention policy is set to redundancy 1
Report of files with less than 1 redundant backups
File #bkps Name
---- ----- -----------------------------------------------------
2    0     /oracle/oradata/trgt/undotbs01.dbf

Note:

If you disable the retention policy using  CONFIGURE  RETENTION  POLICY  TO  NONE, then  REPORT  NEED  BACKUP returns an error message, because without a retention policy, RMAN cannot determine which files need to be backed up.

4.8.2.1 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 OFn DAYS

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

• REPORT NEED BACKUP REDUNDANCYn

  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.