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Google Professional Cloud DevOps Engineer Exam - Topic 11 Question 6 Discussion

You are performing a semiannual capacity planning exercise for your flagship service. You expect a service user growth rate of 10% month-over-month over the next six months. Your service is fully containerized and runs on Google Cloud Platform (GCP). using a Google Kubernetes Engine (GKE) Standard regional cluster on three zones with cluster autoscaler enabled. You currently consume about 30% of your total deployed CPU capacity, and you require resilience against the failure of a zone. You want to ensure that your users experience minimal negative impact as a result of this growth or as a result of zone failure, while avoiding unnecessary costs. How should you prepare to handle the predicted growth?
B) Because you are deployed on GKE and are using a cluster autoscaler. your GKE cluster will scale automatically, regardless of growth rate.
A) Verity the maximum node pool size, enable a horizontal pod autoscaler, and then perform a load test to verity your expected resource needs.
C) Because you are at only 30% utilization, you have significant headroom and you won't need to add any additional capacity for this rate of growth.
D) Proactively add 60% more node capacity to account for six months of 10% growth rate, and then perform a load test to make sure you have enough capacity.

Google Professional Cloud DevOps Engineer Exam - Topic 11 Question 6 Discussion

Actual exam question for Google's Professional Cloud DevOps Engineer exam
Question #: 6
Topic #: 11
[All Professional Cloud DevOps Engineer Questions]

You are performing a semiannual capacity planning exercise for your flagship service. You expect a service user growth rate of 10% month-over-month over the next six months. Your service is fully containerized and runs on Google Cloud Platform (GCP). using a Google Kubernetes Engine (GKE) Standard regional cluster on three zones with cluster autoscaler enabled. You currently consume about 30% of your total deployed CPU capacity, and you require resilience against the failure of a zone. You want to ensure that your users experience minimal negative impact as a result of this growth or as a result of zone failure, while avoiding unnecessary costs. How should you prepare to handle the predicted growth?

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Suggested Answer: B

by Taryn at May 08, 2022, 07:44 AM

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Lorriane
10 months ago
Definitely verify the max node pool size first!
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Willow
10 months ago
Adding 60% capacity seems excessive, but better safe than sorry.
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Pansy
11 months ago
Surprised they think 30% utilization is enough for 10% growth!
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Georgiana
11 months ago
I disagree, the cluster autoscaler should handle it.
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Shalon
11 months ago
A horizontal pod autoscaler is a must for growth!
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Cherilyn
11 months ago
I practiced a similar question where we had to account for zone failures. I think proactively adding capacity is a good strategy, but 60% seems high without testing first.
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Carey
11 months ago
I feel like we might need to consider both the current utilization and the growth rate. Adding some buffer capacity seems wise, but I’m not sure how much is enough.
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Chara
11 months ago
I think option B sounds too optimistic. Just because the cluster autoscaler is enabled doesn’t mean it can handle all growth scenarios without any adjustments.
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Broderick
11 months ago
I remember discussing the importance of load testing in our practice sessions, but I'm not sure if we should just rely on that alone for growth planning.
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Salena
11 months ago
I'm pretty confident I know the answer to this one. Dovecot supports LDAP, CRAM-MD5, and plain authentication.
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Antonio
11 months ago
Hmm, I'm not entirely sure about this one. The content of the data seems like it would be a key factor, but the question is asking what is not important. I'm thinking the importance of the business processes that use the data might be the least important factor, since the value of the data itself is what's really crucial, regardless of how it's used. But I'll need to double-check my reasoning on that.
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Ona
11 months ago
Okay, let's see. I'm pretty sure it's not A or B, since those seem too broad. I'm leaning towards C or D, but I'll need to double-check the details.
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