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
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/