OCP-1Z0-053-200题-75题-652

QUESTION 75

Tape streaming is not happening while performing RMAN tape backup. On investigation, you find that it is not

because of the incremental backup or the empty filebackup and that RMAN is sending data blocks to the tape

drive fast enough.

What could be a solution to make tape streaming happen during the backup?

A. Configure backup optimization

B. Configure the channel to increase MAXOPENFILES

C. Configure the channel to increase the capacity with the RATE parameter

D. Configure the channel to adjust the tape buffer size with the BLKSIZE option

Answer: C

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Explanation/Reference:

Section: Backup, Recovery & Recovery Manager (RMAN)

In the ALLOCATE or CONFIGURE CHANNEL commands, the RATE parameter specifies the bytes/ second

that are read on a channel. You can use this parameter to set an upper limit for bytes read so that RMANdoes

not consume excessive disk bandwidth and degrade online performance. Essentially, RATE serves as a

backup throttle. For example, if you set RATE 1500K, and if each disk drive delivers 3 MB/ second, then the

channel leaves some disk bandwidth available to theonline system.