Oracle Database 12c: Multitenancy Essentials — Question 33

Which two statements are true about backup performance when using Recovery Manager (RMAN) on an X5 Database Machine?

Answer options

• A. Backups are fast because the Infiniband network is faster than fiber channel storage, so RMAN read I/O operations are faster than in traditional storage networks.
• B. Backups are fast, because physical I/Os operations are reduced by the use of the Storage Index by cellsrv.
• C. Backups are fast, because data blocks are read from the Database Flash Cache.
• D. Backups are fast, because all data blocks are read from the Exadata Smart Flash Cache.
• E. For incremental backups using Block Change Tracking, cellsrv filters blocks and returns only those that have changed since the last backup.

Correct answer: D, E

Explanation

Option D is correct because Exadata Smart Flash Cache allows for faster access to frequently used data blocks, enhancing backup performance. Option E is also correct as Block Change Tracking optimizes incremental backups by only processing modified blocks. Options A, B, and C, while mentioning valid concepts, do not directly address the specific mechanisms that significantly enhance backup performance in this context.