OCP-1Z0-053-V12.02-197题

197.Which of the following commands will fail?

A. report schema;

B. report need backup;

C. report need backup days 3;

D. report user;

E. report obsolete;

Answer: D

答案解析：

• REPORT NEED BACKUP

  Reports which database files must be backed up to meet a configured or specified retention policy

• REPORT UNRECOVERABLE

  Reports which database files require backup because they have been affected by some NOLOGGING operation such as a direct-path INSERT

• REPORT OBSOLETE

Full backups, data file copies, and archived redo logs recorded in the RMAN repository that can be deleted because they are no longer needed

• REPORT SCHEMA

The names of all datafiles (permanent and temporary) and tablespaces for the target database at the specified point in time. If you use RMAN in a Data Guard environment, then you can report the schema for a specifiedDB_UNIQUE_NAME.

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

Using RMAN REPORT NEED BACKUP with Tablespaces and Datafiles

The REPORT NEED BACKUP command can check the entire database, skip specified tablespaces, or check only specific tablespaces or datafiles against different retention policies, as shown in the following examples:

REPORT NEED BACKUP RECOVERY WINDOW OF 2 DAYS DATABASE SKIP TABLESPACE TBS_2;

REPORT NEED BACKUP REDUNDANCY 2 DATAFILE 1;

REPORT NEED BACKUP TABLESPACE TBS_3; # uses configured retention policy

REPORT NEED BACKUP INCREMENTAL 2; # checks entire database

Using REPORT NEED BACKUP with Backups on Tape or Disk Only

You can limit the backups tested by the REPORT NEED BACKUP command to disk-based or tape-based backups only, as shown in these examples:

REPORT NEED BACKUP RECOVERY WINDOW OF 2 DAYS DATABASE DEVICE TYPE sbt;

REPORT NEED BACKUP DEVICE TYPE DISK;

REPORT NEED BACKUP TABLESPACE TBS_3 DEVICE TYPE sbt;

官方参考:http://docs.oracle.com/cd/E11882_01/backup.112/e10642/rcmreprt.htm#CHDDBJHC