Discuss Amazon SAA-C03 Exam Topic 3 Question 21

A company is planning to use an Amazon DynamoDB table for data storage. The company is concerned about cost optimization. The table will not be used on most mornings. In the evenings, the read and write traffic will often be unpredictable. When traffic spikes occur, they will happen very quickly.

What should a solutions architect recommend?

ACreate a DynamoDB table in on-demand capacity mode.

BCreate a DynamoDB table with a global secondary index

CCreate a DynamoDB table with provisioned capacity and auto scaling.

DCreate a DynamoDB table in provisioned capacity mode, and configure it as a global table

Suggested Answer: A

Provisioned capacity is best if you have relatively predictable application traffic, run applications whose traffic is consistent, and ramps up or down gradually. On-demand capacity mode is best when you have unknown workloads, unpredictable application traffic and also if you only want to pay exactly for what you use. The on-demand pricing model is ideal for bursty, new, or unpredictable workloads whose traffic can spike in seconds or minutes, and when under-provisioned capacity would impact the user experience. https://docs.aws.amazon.com/wellarchitected/latest/serverless-applications-lens/capacity.html

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14 comments · newest first

Lucille 11 months ago

Definitely leaning towards on-demand for cost efficiency!

Cathrine 11 months ago

Global secondary index? Not sure that's necessary here.

Alonso 11 months ago

Wait, can on-demand really handle those quick spikes?

Tamra 12 months ago

I think provisioned capacity with auto scaling is the way to go.

Francoise 12 months ago

On-demand capacity mode is great for unpredictable traffic!

Leandro 1 year ago

I’m leaning towards option C as well, but I wonder if the auto scaling would be enough for those quick spikes we talked about in our study group.

Marlon 1 year ago

I feel like I’ve seen practice questions where global secondary indexes were important, but I’m not convinced it applies here.

Huey 1 year ago

I'm not entirely sure, but I remember something about auto scaling in option C that could help manage spikes in traffic effectively.

Stanford 1 year ago

I think option A, using on-demand capacity mode, might be the best choice since it can handle unpredictable traffic without extra costs during low usage.

Twana 1 year ago

Okay, I think the key here is that Emily needs to address the team's understanding of Scrum, as well as their ability to articulate problems. The technical knowledge and business value aspects are important, but not the primary focus for a Scrum Master.

Maricela 1 year ago

I feel a bit unsure about Cisco AMP for Endpoints; blocking all SSL connections seems too drastic for normal users.

Muriel 1 year ago

I had a practice question that was similar, and it also highlighted how this pattern helps with interoperability. So, I lean towards true.

Delbert 1 year ago

Okay, let me think this through. The Clark-Wilson model focuses on data integrity, which is important in commercial settings. And the Biba model is also an integrity-based model, so that could be relevant. I'll go with those two.

Jolene 1 year ago

The Concurrent Contracts pattern seems relevant, especially for handling varied security clearances, but could it lead to increased complexity?

Amazon SAA-C03 Exam - Topic 3 Question 21 Discussion