Which two statements about Oracle Direct Network File System (NFS) are true? (Choose two.)
A.
It bypasses the OS file system cache.
B.
A separate NFS interface is required for use across Linux, UNIX, and Windows platforms.
C.
It uses the operating system kernel NFS layer for user tasks and network communication modules.
D.
File systems need not be mounted by the kernel NFS system when being served through Direct NFS.
E.
Oracle Disk Manager can manage NFS on its own, without using the operating system kernel NFS driver.
Explanation:
Direct NFS provides faster performance that what can be provided by the operating system’s NFS driver as
Oracle bypasses the operating system and generates exactly the requests it needs (no user configuration or
tuning required). Data is cached just once in user space, which saves memory (no second copy in kernel
space). Performance is further improved by load balancing across multiple network interfaces (if available).