CompTIA
CV0-003 · Question #576
CV0-003 Question #576: Real Exam Question with Answer & Explanation
The correct answer is D: Network. When NFS storage shows reduced throughput but stable latency on the array side, the bottleneck is in the network layer carrying NFS traffic, not the storage hardware itself.
Troubleshooting
Question
An OS administrator is reporting slow storage throughput on a few VMs in a private IaaS cloud. Performance graphs on the host show no increase in CPU or memory. However, performance graphs on the storage show a decrease of throughput in both IOPS and MBps but not much increase in latency. There is no increase in workload, and latency is stable on the NFS storage arrays that are used by those VMs. Which of the following should be verified NEXT?
Options
- AApplication
- BSAN
- CVM GPU settings
- DNetwork
Explanation
When NFS storage shows reduced throughput but stable latency on the array side, the bottleneck is in the network layer carrying NFS traffic, not the storage hardware itself.
Common mistakes.
- A. Application-layer problems would typically correlate with increased CPU or memory consumption, which the performance graphs do not show.
- B. SAN uses Fibre Channel or iSCSI protocols, but the question explicitly states NFS arrays are in use, making SAN irrelevant to this scenario.
- C. GPU settings have no relationship to storage throughput, IOPS, or MBps on a virtual machine.
Concept tested. NFS storage throughput troubleshooting over network
Topics
#storage throughput#NFS performance#IOPS degradation#network bottleneck
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