Google Exam Professional Cloud Database Engineer Topic 9 Question 48 Discussion

Actual exam question for Google's Professional Cloud Database Engineer exam

Question #: 48
Topic #: 9

[All Professional Cloud Database Engineer Questions]

You are designing for a write-heavy application. During testing, you discover that the write workloads are performant in a regional Cloud Spanner instance but slow down by an order of magnitude in a multi-regional instance. You want to make the write workloads faster in a multi-regional instance. What should you do?

APlace the bulk of the read and write workloads closer to the default leader region.

BUse staleness of at least 15 seconds.

CAdd more read-write replicas.

DKeep the total CPU utilization under 45% in each region.

Show Suggested Answer

Suggested Answer: A

https://cloud.google.com/spanner/docs/instance-configurations#multi-region-best-practices Best practices For optimal performance, follow these best practices: Design a schema that prevents hotspots and other performance issues. For optimal write latency, place compute resources for write-heavy workloads within or close to the default leader region. For optimal read performance outside of the default leader region, use staleness of at least 15 seconds. To avoid single-region dependency for your workloads, place critical compute resources in at least two regions. A good option is to place them next to the two different read-write regions so that any single region outage will not impact all of your application. Provision enough compute capacity to keep high priority total CPU utilization under 45% in each region.

by Launa at Nov 14, 2024, 01:04 PM

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Gladys

4 months ago

I think we should also consider placing the bulk of the read and write workloads closer to the default leader region to optimize performance.

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Josefa

4 months ago

Option A sounds promising. Placing the workloads closer to the default leader region could reduce latency and improve write performance.

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Gary

5 months ago

I agree with Toi. Adding more read-write replicas can help distribute the workload and improve performance.

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Toi

5 months ago

I think we should add more read-write replicas to make the write workloads faster.

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Louis

5 months ago

Haha, keep the total CPU utilization under 45%? That's like asking a cheetah to run at the speed of a sloth. Good one, Option D!

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Loren

4 months ago

Yeah, keeping the CPU under 45% seems like a tough task. Option D might be the best bet.

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Stephen

4 months ago

I think adding more read-write replicas could also help distribute the workload.

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Maryann

4 months ago

Option D is definitely a good one. We need to keep the CPU utilization in check.

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Cammy

4 months ago

Yeah, placing the bulk of the read and write workloads closer to the default leader region could also be a good solution.

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Georgiana

4 months ago

Maybe adding more read-write replicas would help speed up the write workloads.

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Margurite

4 months ago

I agree, keeping CPU utilization under 45% seems impossible.

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Lisbeth

4 months ago

Option D is definitely not realistic in a write-heavy application.

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Malissa

5 months ago

I'm not sure about that. Wouldn't increasing the staleness to 15 seconds (Option B) be a simpler solution to improve write performance?

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Elli

5 months ago

Option C seems like the way to go. Adding more read-write replicas should help distribute the workload and improve overall performance in a multi-regional instance.

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