Which purchase option meets these requirements MOST cost-effectively?

By:
In: CLF-C01
Tagged:
With: 1 Comment
A user is comparing purchase options for an application that runs on Amazon EC2 and Amazon RDS.The application cannot sustain any interruption.The application experiences a predictable amount of usage, including some seasonal spikes that last only a few weeks at a time.It is not possible to modify the application.

Which purchase option meets these requirements MOST cost-effectively?

Review the AWS Marketplace and buy Partial Upfront Reserved Instances to cover the predicted and seasonal load.

Buy Reserved Instances for the predicted amount of usage throughout the year. Allow any seasonal usage to run on Spot Instances.

Buy Reserved Instances for the predicted amount of usage throughout the year. Allow any seasonal usage to run at an On-Demand rate.

Buy Reserved Instances to cover all potential usage that results from the seasonal usage.

Explanations:

Partial Upfront Reserved Instances can reduce costs, but may not effectively cover unpredictable seasonal spikes without additional On-Demand or Spot options.

Using Spot Instances for seasonal usage is risky due to potential interruptions, making it unsuitable for an application that cannot sustain any downtime.

Buying Reserved Instances for predicted usage ensures reliability, and using On-Demand for seasonal spikes maintains availability without interruptions.

Buying Reserved Instances for all potential usage can lead to higher costs, as it does not effectively address the seasonal load without waste for unused capacity.

2025-10-22

1 Comment

  1. Patricia
    Author

    I map out that the answer is:
    Buy Reserved Instances for the predicted amount of usage throughout the year. Allow any seasonal usage to run at an On-Demand rate.

Leave a Reply

Your email address will not be published. Required fields are marked *

two × 4 =