You work for an AWS consulting company and are required to provide cost control for a customer’s AWS resources. This customer has owned various applications which have used over 100 DynamoDB tables. For the below cases, which ones should you consider using On-Demand capacity for DynamoDB? Select 3.

Answer options:

A.New applications whose DynamoDB database workload is very complex to forecast.
B.An application has large spikes sometimes however with very short duration.
C.A long term monitor program that has stable read/write traffic for a DynamoDB table.
D.The read/write throughput for a DynamoDB database is quite steady in weekdays and getting a 20% increase in weekends.
E.An application with serverless stacks with pay-per-use pricing model.

Correct Answer – A, B, E
Amazon DynamoDB On-Demand has no capacity planning and a pay-per-request pricing model. You only pay for what you use, making it easy to balance costs and performance.
Option A is CORRECT: Because DynamoDB on-demand is useful if the application traffic is difficult to predict and control.
Option B is CORRECT: Same reason as
Option A.Option C is incorrect: Because if the traffic is stable, it is better to use Provisioned capacity.
Option D is incorrect: Because as the traffic is predictable, a Provisioned capacity with Auto Scaling can be considered.
Option E is CORRECT: Because DynamoDB on-demand is using a pay per request model and fits into this pricing model of the serverless stacks.