OCP-1Z0-053-V12.02-241题

241.You issued the following RMAN command to back up the database:

RMAN> RUN{

ALLOCATE CHANNEL c1 DEVICE TYPE sbt

BACKUP DATABASE

TAG quarterly

KEEP FOREVER

RESTORE POINT FY06Q4;}

Which two statements are true regarding the backup performed? (Choose two.)

A. Archived redo log files are backed up along with data files.

B. Only data files are backed up and a restore point named FY06Q4 is created.

C. Archived log files are backed up along with data files, and the archived log files are deleted.

D. The command creates a restore point named FY06Q4 to match the SCN at which this backup is consistent.

Answer: AD

答案解析：

参考：http://docs.oracle.com/cd/E11882_01/backup.112/e10643/rcmsynta007.htm#RCMRF90048

keepOption

Overrides any configured retention policy for this backup so that the backup is not considered obsolete, as shown in Example 2-26. You can use the KEEP syntax to generate archival database backups that satisfy business or legal requirements. The KEEP setting is an attribute of the backup set (not individual backup piece) or image copy. Note: You cannot use KEEP with BACKUP BACKUPSET. With the KEEP syntax, you can keep the backups so that they are considered obsolete after a specified time (KEEP UNTIL), or make them never obsolete (KEEP FOREVER). As shown in Example 2-27, you must be connected to a recovery catalog when you specify KEEP FOREVER. Note: You can use CHANGE to alter the status of a backup generated with KEEP. See Also: keepOption for more information about backups made with the KEEP option

Creating a Consistent Database Backup for Archival Purposes

This example uses a keepOption to create an archival backup set that cannot be considered obsolete for one year. The example backs up the database, archives the redo in the current online logs to ensure that this new backup is consistent, and backs up only those archived redo log files needed to restore the data file backup to a consistent state.

The BACKUP command also creates a restore point to match the SCN at which this backup is consistent. The FORMAT parameter must be capable of creating multiple backup pieces in multiple backup sets.

BACKUP DATABASE

  FORMAT '/disk1/archival_backups/db_%U.bck'

  TAG quarterly

  KEEP UNTIL TIME 'SYSDATE + 365'

  RESTORE POINT Q1FY06;