configure backup optimization_runtime optimization_optimizat

703. Given below are RMAN commands to enable ba ckup optimization and set the retention policy:

The USERS tablespace has never been backed up. Y ou take the USERS tablespace offline on Monday.

View the Exhibit to examine the operations performed by using RMAN. Which two statements are true

about the backup of the USERS tablespace? (Choose two.)

A.It will be backed up as a part of database backup on Friday.

B.It will be backed up as a part of database backup on Tuesday.

C.It will not be backed up as a part of database backup on Wednesday.

D.The command on Sunday deletes the backup of the USERS tablespace taken on Tuesday.

Answer: AB

答案解析：

从以下答案指导BD正确。configure backup optimizationconfigure backup optimization

参考：#BRADV89464

Assume that you configure a retention policy for redundancy. In this case, RMAN only skips backups of offline or read-only data files to SBT when there arer+ 1 backups of the files, whereris set inCONFIGURERETENTIONPOLICYTOREDUNDANCYr.

For example, assume that you enable backup optimization and set the following retention policy:

With these settings, RMAN only skips backups when three identical files are already backed up. Also assume that you have never backed up theuserstablespace, which is read/write, and that you perform the actions described inover the course of the week.

The backups on Tuesday, Wednesday, and Thursday back up the offlineuserstablespace to satisfy the condition that three backups must exist (one more than redundancy setting). The Friday and Saturday backups do not back up theuserstablespace because of backup optimization. The Tuesday backup ofusersis obsolete beginning on Thursday.

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