The correct answer is to configure Storage I/O Control and set the database VM’s shares to High. Storage I/O Control (SIOC) dynamically manages storage I/O resources across VMs on a VMFS datastore by using relative share values, so when congestion occurs, the VM with higher shares receives a proportionally larger slice of the available I/O bandwidth. This directly addresses the high latency for the critical database VM while idle VMs on the same datastore will naturally receive less I/O due to their lower share weighting. On the VCP-DCV exam, this scenario tests your understanding that SIOC shares are a relative priority mechanism, not a hard limit—a common trap is confusing shares with limits or reservations, or incorrectly assuming DRS handles storage I/O. Remember the mnemonic: “Shares for priority, not a quota—SIOC gives the busy VM the bigger slice of the I/O pie.”
VCP-DCV Configure and Manage vSphere Storage Practice Question
This VCP-DCV practice question tests your understanding of configure and manage vsphere storage. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
A company experiences high latency on a VM running a critical database. The storage is a VMFS datastore on a SAN. The administrator notices that other VMs on the same datastore are idle. What should the administrator configure to ensure the database VM gets sufficient storage I/O resources?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Configure Storage I/O Control and set the database VM's shares to High.
Storage I/O Control (SIOC) enables dynamic sharing of storage I/O resources among VMs on a datastore. By setting a higher share value for the database VM, it will get priority when congestion occurs. Option B is wrong because shares do not set a limit; they are relative weighting. Option C is wrong because limiting all other VMs would be inefficient and may cause starvation. Option D is wrong because DRS is for compute load balancing, not storage I/O.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✓
Configure Storage I/O Control and set the database VM's shares to High.
Why this is correct
Correct: SIOC with high shares gives the database VM priority during congestion.
Related concept
Read the scenario before looking for a memorised answer.
✗
Set storage I/O limits on all other VMs to 100 IOPS.
Why it's wrong here
Incorrect: Limiting all other VMs is not a best practice and could cause issues; shares are preferred.
✗
Configure Storage I/O Control and set a latency threshold of 5 ms.
Why it's wrong here
Incorrect: Latency threshold is used to trigger SIOC, not to prioritize a specific VM.
✗
Use Storage DRS to migrate idle VMs to another datastore.
Why it's wrong here
Incorrect: Storage DRS moves VMs for load balancing, but does not provide I/O prioritization within a datastore.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Many certification questions include familiar terms but test a specific constraint. Read the exact wording before choosing an answer that is generally true but wrong for this case.
Detailed technical explanation
How to think about this question
This question should be treated as a scenario, not a definition check. Identify the problem, the constraint and the best action. Then compare each option against those facts.
KKey Concepts to Remember
Read the scenario before looking for a memorised answer.
Find the constraint that changes the correct option.
Eliminate answers that are true in general but not in this case.
Use explanations to understand the rule behind the answer.
TExam Day Tips
→Underline the problem statement mentally.
→Watch for words such as best, first, most likely and least administrative effort.
→Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
A practitioner preparing for the VCP-DCV exam encounters this exact type of scenario on the job. The correct answer here is not the most general option — it is the best answer for the specific constraint described. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Real exam questions reward reading the full scenario before eliminating options, because the constraint defines which answer fits.
What to study next
Got this wrong? Here's your next step.
Identify which VCP-DCV exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
Configure and Manage vSphere Storage — This question tests Configure and Manage vSphere Storage — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Configure Storage I/O Control and set the database VM's shares to High. — Storage I/O Control (SIOC) enables dynamic sharing of storage I/O resources among VMs on a datastore. By setting a higher share value for the database VM, it will get priority when congestion occurs. Option B is wrong because shares do not set a limit; they are relative weighting. Option C is wrong because limiting all other VMs would be inefficient and may cause starvation. Option D is wrong because DRS is for compute load balancing, not storage I/O.
What should I do if I get this VCP-DCV question wrong?
Identify which VCP-DCV exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Question Discussion
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