Examine the command used to perform an incremental level-0 backup:
RMAN>BACKUPINCREMENTALLEVEL0DATABASE;
To enable block change tracking, after the incremental level 0 backup, you issue the
command:
SQL>ALTERDATABASEENABLEBLOCKCHANGETRACKINGUSING
FILE’/mydir/rman_change_track.f’;
To perform an incremental level-1 cumulative backup, you issue the command:
RMAN>BACKUPINCREMENTALLEVEL1CUMULATIVEDATABASE;
Which two statements are true in the preceding situation?
A.
The block change tracking data is used only from the next incremental backup.
B.
The incremental level 1 backup fails because a block change tracking file Is created after
the level 0 backup.
C.
The incremental level 1 backup does not use change tracking data for accomplishing the
backup.
D.
The block change tracking file scans all blocks and creates a bitmap for the blocks backed
up in the level 0 backup.
E.
The block change tracking data is used for the next incremental level 1 backup only after
the next level 0 backup.
C and E are fine
CE
CE
After enabling change tracking, the first level 0 incremental backup still has to scan the entire datafile, as the change tracking file does not yet reflect the status of the blocks. Subsequent incremental backup that use this level 0 as parent will take advantage of the change tracking file.
why not D and E?
incremental level 1 does use change tracking
CE