VCP-DCV vSphere Performance and Scaling Practice Question
A vSAN stretched cluster is configured with two witness hosts to allow for site failures. Performance troubleshooting reveals that write latency for synchronous writes is higher than expected for cross-site operations. Which setting should be reviewed as a likely cause?
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
vSAN preferred fault domain configuration
In a stretched cluster, if the network latency between sites is high, it can increase write latency. The preferred fault domain setting can also affect latency if the VM's data is not local.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
vSAN preferred fault domain configuration
Why this is correct
If the VM is not using the local site as preferred, writes may be sent to a remote site, increasing latency.
- ✗
vSAN deduplication and compression
Why it's wrong here
Deduplication affects capacity, not write latency directly.
- ✗
vSAN object repair timer
Why it's wrong here
The repair timer affects object availability, not performance under normal conditions.
- ✗
vSAN network MTU setting
Why it's wrong here
MTU affects throughput, not specifically cross-site write latency.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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