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Question 84 - DBS-C01 discussion

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A large ecommerce company uses Amazon DynamoDB to handle the transactions on its web portal.

Traffic patterns throughout the year are usually stable; however, a large event is planned. The company knows that traffic will increase by up to 10 times the normal load over the 3-day event.

When sale prices are published during the event, traffic will spike rapidly.

How should a Database Specialist ensure DynamoDB can handle the increased traffic?

A.
Ensure the table is always provisioned to meet peak needs
Answers
A.
Ensure the table is always provisioned to meet peak needs
B.
Allow burst capacity to handle the additional load
Answers
B.
Allow burst capacity to handle the additional load
C.
Set an AWS Application Auto Scaling policy for the table to handle the increase in traffic
Answers
C.
Set an AWS Application Auto Scaling policy for the table to handle the increase in traffic
D.
Preprovision additional capacity for the known peaks and then reduce the capacity after the event
Answers
D.
Preprovision additional capacity for the known peaks and then reduce the capacity after the event
Suggested answer: D

Explanation:


https://docs.aws.amazon.com/amazondynamodb/latest/developerguide/bp-partition-keydesign.html#bp-partition-key-throughput-bursting

"DynamoDB provides some flexibility in your per-partition throughput provisioning by providing burst capacity. Whenever you're not fully using a partition's throughput, DynamoDB reserves a portion of that unused capacity for later bursts of throughput to handle usage spikes. DynamoDB currently retains up to 5 minutes (300 seconds) of unused read and write capacity. During an occasional burst of read or write activity, these extra capacity units can be consumed quickly— evenfaster than the per-second provisioned throughput capacity that you've defined for your table.

DynamoDB can also consume burst capacity for background maintenance and other tasks without prior notice. Note that these burst capacity details might change in the future."

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asked 16/09/2024
Daniel Martos
44 questions
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