Which action should you take?

You are tuning RMAN to optimize performance. You want tape I/O to be asynchronous when you
perform tape backups. Which action should you take?

A.
Set the BACKUP_TAPE_IO_SLAVES parameter to FALSE.

B.
Set the BACKUP_TAPE_IO_SLAVES parameter to TRUE.

C.
Use compression when performing tape backups.

D.
Configure multiple SBT channels.

Explanation:
You should set the BACKUP_TAPE_IO_SLAVES parameter to TRUE. When this parameter is set
to TRUE, RMAN uses I/O server processes to perform reads and writes when performing

backups, copies, or restores to or from tape. When asynchronous tape I/O is configured, tape
buffers are allocated from the SGA, rather than the PGA. With asynchronous I/O, the server
process can perform multiple I/O operations at the same time. For example, it can begin a
read/write operation and perform other tasks while waiting for the current I/O operation to finish.
You should note that the support for asynchronous I/O is dependent on the operating system. Not
all operating systems support asynchronous tape I/O. You should not set the
BACKUP_TAPE_IO_SLAVES parameter to FALSE. This would configure RMAN to use
synchronous tape I/O, which is the default value. With synchronous tape I/O, a server process can
perform only one operation at a time, and tape buffers are allocated from the PGA. All of the other
options are incorrect. Using compression or multiple channels does not configure RMAN to use
asynchronous tape I/O.