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
同652题：http://blog.csdn.net/rlhua/article/details/16105787
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.