The correct answer is to enable the IOPS-based workload rebalancing feature. This feature directly addresses the performance issue by automatically redistributing storage I/O load across the cluster nodes based on real-time IOPS metrics, preventing any single node from becoming a bottleneck during peak hours—which is the root cause of the vSphere DRS imbalance in a HyperFlex all-flash environment. On the Cisco DCCOR 350-601 exam, this question tests your understanding of HyperFlex storage performance optimization, often appearing as a scenario where an engineer misidentifies a vSphere DRS imbalance as a compute issue. A common trap is to suggest increasing the number of vCPUs or adjusting DRS thresholds, but the real fix is storage-side rebalancing. Memory tip: Think “IOPS = I/O Pressure Solver”—when the cluster feels the strain, let IOPS rebalance the pain.
350-601 Compute Practice Question
This 350-601 practice question tests your understanding of compute. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. 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 Cisco HyperFlex cluster is experiencing performance issues during peak hours. The cluster uses a 4-node all-flash configuration. The engineer notices that the vSphere DRS cluster is heavily imbalanced. Which HyperFlex feature should be used to improve performance by balancing the storage load across nodes?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Enable the IOPS-based workload rebalancing feature
Option B is correct because the IOPS-based workload rebalancing feature in Cisco HyperFlex automatically redistributes storage I/O load across cluster nodes based on real-time IOPS metrics. This directly addresses the performance issue during peak hours by ensuring no single node becomes a storage bottleneck, which is the root cause of the vSphere DRS imbalance in a HyperFlex environment.
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.
✗
Enable Storage DRS on the HyperFlex datastore
Why it's wrong here
Storage DRS is for datastore clusters, not for balancing I/O across HyperFlex controller VMs.
✓
Enable the IOPS-based workload rebalancing feature
Why this is correct
This feature automatically rebalances data across nodes based on IOPS, improving performance.
Related concept
Read the scenario before looking for a memorised answer.
✗
VM vMotion to move VMs to less busy nodes
Why it's wrong here
vMotion only moves compute load, not storage I/O; the underlying storage remains on the same nodes.
✗
Adjust the deduplication and compression settings to reduce write amplification
Why it's wrong here
This reduces capacity but does not balance load across nodes.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Cisco often tests the distinction between compute load balancing (vSphere DRS/VM vMotion) and storage I/O load balancing (HyperFlex IOPS rebalancing), leading candidates to mistakenly choose VM vMotion when the issue is storage-side, not compute-side, contention.
Detailed technical explanation
How to think about this question
The IOPS-based workload rebalancing feature uses a distributed algorithm that monitors per-node I/O latency and IOPS counters, then triggers automatic data migration (via the HyperFlex Stretch cluster or internal replication) to move hot data extents from overloaded nodes to underutilized ones. This is distinct from vSphere DRS, which only considers CPU and memory metrics, and operates at the HyperFlex controller VM (SCVM) level to ensure uniform storage performance across the cluster.
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.
TExam Day Tips
→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 350-601 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 exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Compute — This question tests Compute — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Enable the IOPS-based workload rebalancing feature — Option B is correct because the IOPS-based workload rebalancing feature in Cisco HyperFlex automatically redistributes storage I/O load across cluster nodes based on real-time IOPS metrics. This directly addresses the performance issue during peak hours by ensuring no single node becomes a storage bottleneck, which is the root cause of the vSphere DRS imbalance in a HyperFlex environment.
What should I do if I get this 350-601 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
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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