Oracle 11G OCP 1Z0-053 612

（612）Examine the following command used to perform incremental level 0 backup:

RMAN>BACKUP INCREMENTAL LEVEL 0 DATABASE;

To enable the block change tracking,after the incremental level 0 backup you issued the following command:

SQL>ALTER DATABASE ENABLE BLOCK CHANGE TRACKING USING FILE '/mydir/rman_change_track.f';

To perform incremental level 1 cumulative backup,you issued the following command:

RMAN>BACKUP INCREMENTAL LEVEL 1 CUMULATIVE DATABASE;

Which two statements are true in the above situation?(Choose two.)

A. The block change tracking data will be used only from the next incremental 0 backup.

B. The incremental backup will use change tracking data for accomplishing the backup.

C. The incremental backup will not use change tracking data for accomplishing the backup.

D. The block track file will scan all the blocks and create bitmap for all the blocks backed up in the level 0 backup.

答案：（A、C）

解析：

rman的塊跟蹤技術備份需要前面有增量0級備份做為參照物，本例先執行了0級備份，後開啟塊跟蹤功能，所以下一次的備份就無法實現塊跟蹤功能

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