47 You want to use RMAN to create compressed backups. Which statement is true about the compression

QUESTION 47

You want to use RMAN to create compressed backups.

Which statement is true about the compression algorithms that RMAN can use?

A. The BZIP2 compression algorithm consumes more CPU resources than the ZLIB compression

algorithm.

B. The ZLIB compression algorithm consumes more CPU resources than the BZIP2 compression

algorithm.

C. The ZLIB compression algorithm provides maximum compression and produces smaller backups than

the BZIP2 compression algorithm.

D. Only the BZIP2 compression algorithm can be used to make compressed backups to disk.

Correct Answer: A

Section: (none)

Explanation

Explanation/Reference:

Explanation:

The BZIP2 compression algorithm consumes more CPU resources than the ZLIB compression algorithm.

The BZIP2 compression algorithm provides for optimum compression, but tends to use more CPU

resources than the ZLIB compression algorithm. The ZLIB compression algorithm is optimized for

performance and uses less CPU resources. You should note that the COMPATIBLE initialization

parameter must be set to 11.0.0 or higher to use the ZLIB compression algorithm.

The option that states the ZLIB compression algorithm consumes more CPU resources than the BZIP2

compression algorithm is incorrect. The BZIP2 compression algorithm consumes more CPU resources.

The option that states the ZLIB compression algorithm provides maximum compression and produces

smaller backups than the BZIP2 compression algorithm is incorrect. The BZIP2 compression algorithm

provides maximum compression and produces smaller backups than the ZLIB compression algorithm.

The option that states only the BZIP2 compression algorithm can be used to make compressed backups to

disk is incorrect. The ZLIB compression algorithm can also be used to make compressed backups to disk.