What is the advantage of setting the ASM-preferred mirror read for the stretch cluster
configuration?
A.
It improves resync operations.
B.
This feature enables much faster file opens.
C.
It improves performance as fewer extent pointers are needed in the shared pool.
D.
It improves performance by reading from a copy of an extent closest to the node.
Explanation:
Preferred Read Failure Groups
When you configure Oracle ASM failure groups, it might be more efficient for a node to read
from an extent that is closest to the node, even if that extent is a secondary extent. In other
words, you can configure Oracle ASM to read from a secondary extent if that extent is closer
to the node instead of Oracle ASM reading from the primary copy which might be farther
from the node. Using the preferred read failure groups feature is most useful in extended
clusters.