350-601 Compute Practice Question
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?
⚠ Common exam trap
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.
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
✓
Enable the IOPS-based workload rebalancing feature
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.
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.
- ✗
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.
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