1Z0-078 practice question 5 of 15

Which two statements are true about High Availability NFS (HANFS)? (Choose two.)

Full set: 77 questions

Answer options

A: HANFS provides high availability in case of an NFS client failure.

B: HANFS' performance depends on the characteristics of the underlying ASM disks. Correct answer

C: HANFS does not depend on NFS services provided by the underlying operating system.

D: HANFS provides high availability in case of cluster node failure. Correct answer

E: NFS client requests are distributed by DNS in a round-robin fashion to the cluster nodes that export the NFS

Correct Answer:

B. HANFS' performance depends on the characteristics of the underlying ASM disks.; D. HANFS provides high availability in case of cluster node failure.

Explanation

HANFS exports reside on ACFS volumes that in turn sit on ADVM volumes; hence I/O performance ultimately depends on the underlying ASM disks. Because the HANFS service is managed by Oracle Clusterware with a virtual IP, NFS shares automatically fail over to a surviving node when a cluster node crashes, providing high availability.

Why Incorrect

A. Client failures are outside the scope of HANFS high-availability design.
C. HANFS relies on the host OS NFS kernel modules to service requests.
E. Clients mount a HANFS export through its virtual IP, not via DNS round-robin.

References

1. Oracle® ACFS, ADVM, and HANFS Guide 19c, Chap. 6 “High Availability NFS (HANFS)”, p.6-3 – 6-5

2. Oracle® Grid Infrastructure 19c Administrator’s Guide, Sec. “Virtual IP addresses for HANFS”, p.14-12

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