A company runs Amazon EC2 instances in a research lab. The instances run for 3 hours each week and cannot be interrupted.
What is the MOST cost-effective instance purchasing option to meet these requirements?
A company runs Amazon EC2 instances in a research lab. The instances run for 3 hours each week and cannot be interrupted.
What is the MOST cost-effective instance purchasing option to meet these requirements?
For instances that run for only 3 hours each week and cannot be interrupted, On-Demand Instances are the most suitable option. On-Demand Instances allow you to pay for compute capacity by the hour or second with no long-term commitments. This flexibility makes them ideal for short-term, irregular workloads that do not benefit significantly from the discounts offered by longer-term commitments such as Compute Savings Plans or Reserved Instances. Spot Instances, while cheap, are not suitable since they can be interrupted, and Convertible Reserved Instances are better suited for steady, predictable usage over a longer period.
The question is "MOST cost-effective" which is compute savings plan
Per ChatGPT Compute Savings Plans are not suitable for instances that run for only 3 hours a week without interruption. Compute Savings Plans provide discounts for consistent usage of EC2 instances in exchange for a commitment to a specific amount of compute usage (measured in dollars per hour) over a 1- or 3-year term. They are designed for workloads with predictable and sustained usage, not for sporadic or short-duration instances like those running only 3 hours per week. Therefore, Compute Savings Plans would not be the most cost-effective option for this scenario.
The correct answer is: A. Compute Savings Plan Since the instances run for a fixed 3 hours each week and cannot be interrupted, a Compute Savings Plan is the most cost-effective option. This plan provides a discount on EC2 instances usage based on a committed hourly usage over a 1-year term, which aligns with the company's predictable usage pattern. On-Demand Instances: This option would charge the company the full hourly rate for the instances, without any discounts