Great News!
Many students who study using our platform have reported that a large number of the practice questions here are very similar to those that appear in real exams. View Courses
Many students who study using our platform have reported that a large number of the practice questions here are very similar to those that appear in real exams. View Courses
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?
Correct Answer: D. Network
Given that CPU and memory usage on the host are stable, and storage latency and workload have not increased, the next logical step is to verify the network. Since the storage is accessed over NFS, network issues such as congestion, packet loss, or misconfiguration could reduce throughput without increasing latency, impacting IOPS and MBps. Checking network connectivity, bandwidth, and errors will help identify if network problems are causing the storage throughput degradation.
Why Other Options are Incorrect:
A. Application
The problem is observed at the storage throughput level without increased workload, so application issues are unlikely the cause. If the application were causing the slowdown, workload or host resource usage would typically increase.
B. SAN
The storage arrays show stable latency and no increase in workload, indicating the SAN or storage backend is functioning properly. Therefore, the SAN is less likely the root cause of the throughput drop.
C. VM GPU settings
GPU settings affect graphics processing and have no impact on storage throughput or I/O performance. This is unrelated to the reported storage performance issues on the VMs.
Discover a range of courses designed to provide you with the knowledge and skills needed to excel in your chosen field.
You don’t need one month to study and pass your test.
With Prepsaret, it takes you a few days to grasp all the concepts needed to pass your exams