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VMware 5V0-21.21 Exam - Topic 7 Question 82 Discussion

Upon investigating a workload performance issue, a vSAN administrator observed a high backend IOPs on a vSAN cluster.Which two causes explain this behavior? (Choose two.)
B) There is a vSAN node failure. and E) The vSAN policy protection level has changed from FTT=0 to FTT=1.
A) The cluster DRS threshold has been set to Aggressive.
C) The vSAN Resync throttling is enabled.
D) The object repair timer value has been increased.

VMware 5V0-21.21 Exam - Topic 7 Question 82 Discussion

Actual exam question for VMware's 5V0-21.21 exam
Question #: 82
Topic #: 7
[All 5V0-21.21 Questions]

Upon investigating a workload performance issue, a vSAN administrator observed a high backend IOPs on a vSAN cluster.

Which two causes explain this behavior? (Choose two.)

Show Suggested Answer Hide Answer
Suggested Answer: B, E

by Lourdes at May 04, 2025, 03:40 PM

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Polly
9 months ago
I agree with B, node failures can spike IOPs.
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Kris
9 months ago
Wait, isn't D a bit of a stretch?
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Rusty
9 months ago
I think A could also be a factor, but not sure.
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Dan
10 months ago
C seems unlikely, resync throttling usually helps, right?
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Flo
10 months ago
Definitely B and E, those make sense.
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Mitsue
10 months ago
Changing the FTT value seems relevant too, but I’m not clear on how that directly relates to backend IOPs.
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Nicolette
10 months ago
I practiced a question about resync throttling before, and I feel like that could also impact IOPs, but I can't recall the details.
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Eleonora
11 months ago
I think a node failure could definitely lead to high backend IOPs, especially if it's trying to rebuild data.
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Elbert
11 months ago
I remember something about DRS settings affecting performance, but I'm not sure if "Aggressive" is the right choice here.
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Barney
11 months ago
Hmm, the DRS threshold and node failure seem like the most straightforward answers here. I'll start by evaluating those and see if I can rule out the other options.
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Aja
11 months ago
I feel pretty confident about this one. The vSAN policy protection level change from FTT=0 to FTT=1 is definitely going to increase backend IOPS as the system works to maintain the new protection level.
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Joaquin
11 months ago
I'm a bit confused by the vSAN Resync throttling and object repair timer value options. Not sure how those would directly impact backend IOPS. I'll have to think that through.
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Joanna
12 months ago
Okay, let's see. The cluster DRS threshold and vSAN node failure seem like the most likely culprits here. I'll focus on those two options.
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Lawanda
12 months ago
Hmm, this seems like a tricky one. I'll need to carefully consider the different factors that could lead to high backend IOPS on a vSAN cluster.
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Johnetta
1 year ago
I think it could be a combination of both the vSAN node failure and the Resync throttling.
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Gaynell
1 year ago
I believe the vSAN Resync throttling being enabled could also be a cause.
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Carole
1 year ago
I agree with Stefania, that could definitely cause the issue.
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Stefania
1 year ago
I think the high backend IOPs could be due to a vSAN node failure.
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Maryann
1 year ago
That's a good point, Starr. It's important to consider all possible causes.
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Misty
1 year ago
Haha, imagine if the correct answers were A and D. The cluster DRS threshold set to Aggressive and the object repair timer value increased? Sounds like a recipe for disaster!
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Starr
1 year ago
I believe the vSAN Resync throttling being enabled could also contribute to the high backend IOPs.
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Cherry
1 year ago
I agree with B and E, but I also think C could be a factor. If vSAN Resync throttling is enabled, it can lead to increased IOPs during the resync process.
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Kandis
1 year ago
Yes, I agree. C could also be a factor if vSAN Resync throttling is enabled.
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Junita
1 year ago
I think B and E are the main causes of the high backend IOPs.
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Verona
1 year ago
I agree with you, Verona. That could definitely cause performance issues.
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Erick
1 year ago
I think the correct answers are B and E. A node failure can definitely cause high backend IOPs, and changing the protection level from FTT=0 to FTT=1 would also increase the load on the backend.
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Kanisha
1 year ago
That makes sense, those are the two causes that explain the behavior.
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Ming
1 year ago
I think the correct answers are B and E.
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Daniel
1 year ago
Changing the protection level from FTT=0 to FTT=1 would also increase the load on the backend.
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France
1 year ago
I agree, a node failure can definitely cause high backend IOPs.
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Maryann
1 year ago
I think the high backend IOPs could be due to a vSAN node failure.
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