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CV0-002 · Question #108

Which of the following tests would be MOST appropriate when over allocate storage on VMs in a development cluster?

The correct answer is C. Latency testing. When over-allocating storage on VMs, latency testing is the most appropriate test to perform to identify potential performance bottlenecks.

Troubleshooting

Question

Which of the following tests would be MOST appropriate when over allocate storage on VMs in a development cluster?

Options

  • APenetration testing
  • BVulnerability scan
  • CLatency testing
  • DBandwidth determination

How the community answered

(30 responses)
  • A
    3% (1)
  • C
    93% (28)
  • D
    3% (1)

Why each option

When over-allocating storage on VMs, latency testing is the most appropriate test to perform to identify potential performance bottlenecks.

APenetration testing

Penetration testing is a security assessment designed to find exploitable vulnerabilities in a system.

BVulnerability scan

A vulnerability scan is a security assessment that identifies known security weaknesses without attempting to exploit them.

CLatency testingCorrect

Over-allocating storage can lead to I/O contention on the underlying physical disks, which primarily manifests as increased latency for read and write operations. Latency testing directly measures the responsiveness of the storage system, providing critical insights into the performance impact of over-allocation.

DBandwidth determination

Bandwidth determination measures the maximum data transfer rate, which is less directly indicative of the performance impact of storage over-allocation compared to the response time of individual I/O operations.

Concept tested: Performance testing of over-allocated storage

Source: https://learn.microsoft.com/en-us/azure/azure-sql/virtual-machines/windows/performance-guidelines-sql-server-azure-vm?view=azuresql&tabs=latest

Topics

#Storage performance#Latency testing#Thin provisioning impact

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