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
参考：http://docs.oracle.com/cd/E11882_01/backup.112/e10642/rcmreprt.htm#sthref1040
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
RMAN> REPORT NEED BACKUP days 3;
文件报表的恢复需要超过 3 天的归档日志
文件天数据 名称
---- ----- -----------------------------------------------------
1 1695 C:\APPS\ORACLE\ORADATA\COW\SYSTEM01.DBF
2 1695 C:\APPS\ORACLE\ORADATA\COW\SYSAUX01.DBF
3 1695 C:\APPS\ORACLE\ORADATA\COW\UNDOTBS01.DBF
4 1695 C:\APPS\ORACLE\ORADATA\COW\USERS01.DBF
5 1265 C:\APPS\ORACLE\ORADATA\COW\EXAMPLE01.DBF
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