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Nutanix Exam NCS-Core Topic 1 Question 73 Discussion

Actual exam question for Nutanix's NCS-Core exam
Question #: 73
Topic #: 1
[All NCS-Core Questions]

A consultant deploys a new ESXi-based Nutanix cluster and migrates a sphere deployment to the cluster, After completing the deployment, the customer states they are experiencing VM performance issues.

Upon observing logs and performance data, the consultant identified the following symptoms.

Excessive read/write 1/Os on CVMs

Excessive Motion of VMs

What is causing this issue?

Show Suggested Answer Hide Answer
Suggested Answer: D

The customer is experiencing VM performance issues characterized by excessive read/write I/Os on CVMs and excessive motion of VMs due to the Distributed Resource Scheduler (DRS) in an ESXi-based Nutanix cluster. This is likely caused by the DRS migration threshold being set to Aggressive, which leads to frequent rebalancing of workloads across the cluster, causing high I/O and VM motion. Adjusting this setting to a less aggressive level can help reduce unnecessary VM motions and stabilize performance. Reference: Nutanix Bible, Nutanix University NCS-Core 6.8 learning materials


by Leonie at Nov 18, 2024, 07:24 AM

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Pansy
3 days ago
Maybe the cluster is configured to use Erasure Coding, which could also impact performance.
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Cherry
4 days ago
I agree with Gilma, if the threshold is too aggressive, it could be causing performance issues.
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Linwood
7 days ago
Option C, Deduplication, definitely. That's like trying to fit a square peg in a round hole, no wonder the VMs are dancing around.
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Vi
14 days ago
I'm going with D, Aggressive DRS migration threshold. Sounds like the cluster's been doing the Cha Cha Slide a little too enthusiastically.
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Cecilia
5 days ago
A: I think it might be because the DRS migration threshold is set to Aggressive.
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Nu
22 days ago
Gotta be option B, Erasure Coding can really chew through those I/Os. Looks like the cluster's doing the Macarena a little too hard.
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Carline
4 days ago
Yeah, Erasure Coding can definitely impact I/O performance on the cluster.
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Tu
12 days ago
I agree, option B seems like the most likely cause of the performance issues.
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Gilma
25 days ago
I think the issue might be related to the DRS migration threshold.
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Lachelle
25 days ago
Hmm, excessive read/write I/Os and VM motion? Looks like someone's been playing musical chairs with their VMs.
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Santos
14 days ago
C) DRS is in use and the cluster is configured to use Deduplication.
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Viola
18 days ago
B) DRS is in use and the cluster is configured to use Erasure Coding.
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Bea
19 days ago
A) Sphere cluster DRS migration threshold is set to Conservative.
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