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Question 12/90
Which two statements are true about backup performance when using Recovery Manager (RMAN) on an X5 Database Machine?
Correct Answer: D,E
Explanation/Reference:
D: The storage server software manages the flash cache and can recognize different types of I/O requests so that non-repeatable data access like RMAN backup I/O does not flush database blocks from the cache.
It also prioritizes frequently accessed block types such as redo logs, control files, and index root blocks.
E: RMAN block change tracking allows incremental backups to run very quickly and efficiently. With block change tracking, only the areas of the database that have been modified since the last incremental backup or full backup are read from disk.
Incorrect Answers:
C: Database Flash Cache is separate from Exadata Smart Flash Cache. The Database Smart Flash Cache feature and increase the buffercache of your database from like 100G or 200G to 300-700G on that same server.
References: https://logicalread.com/using-oracle-exadata-flash-cache-mc05/#.Wd80zmiCyUk
http://www.oracle.com/technetwork/database/availability/maa-tech-wp-sundbm-backup-11202-183503.pdf
D: The storage server software manages the flash cache and can recognize different types of I/O requests so that non-repeatable data access like RMAN backup I/O does not flush database blocks from the cache.
It also prioritizes frequently accessed block types such as redo logs, control files, and index root blocks.
E: RMAN block change tracking allows incremental backups to run very quickly and efficiently. With block change tracking, only the areas of the database that have been modified since the last incremental backup or full backup are read from disk.
Incorrect Answers:
C: Database Flash Cache is separate from Exadata Smart Flash Cache. The Database Smart Flash Cache feature and increase the buffercache of your database from like 100G or 200G to 300-700G on that same server.
References: https://logicalread.com/using-oracle-exadata-flash-cache-mc05/#.Wd80zmiCyUk
http://www.oracle.com/technetwork/database/availability/maa-tech-wp-sundbm-backup-11202-183503.pdf
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