Which solution should be used to minimize costs?

A company is running an ecommerce application on Amazon EC2. The application consists of a stateless web tier that requires a minimum of 10 instances, and a peak of 250 instances to support the application’s usage. The application requires 50 instances 80% of the time.

Which solution should be used to minimize costs?
A . Purchase Reserved Instances to cover 250 instances.
B . Purchase Reserved Instances to cover 80 instances. Use Spot Instances to cover the remaining instances.
C . Purchase On-Demand Instances to cover 40 instances. Use Spot Instances to cover the remaining instances.
D . Purchase Reserved Instances to cover 50 instances. Use On-Demand and Spot Instances to cover the remaining instances.

View Answer

Answer: D