What is the MOST cost-effective pricing model for this workload?

A user has a stateful workload that will run on Amazon EC2 for the next 3 years.

What is the MOST cost-effective pricing model for this workload?
A . On-Demand Instances
B . Reserved Instances
C . Dedicated Instances
D . Spot Instances

View Answer

Answer: A

Explanation:

On-demand instances are useful for running stateful workloads without making a long-term commitment, but if your workloads are stateless or can tolerate shorter run cycles, there’s a more cost-effective instance type called a Spot Instance.

Reference: https://www.gremlin.com/blog/implementing-cost-saving-strategies-on-amazon-ec-2-with­chaos-engineering/