Question
A company needs to run a batch data-processing job on Amazon EC2 instances. The job will run during the weekend and will take 90 minutes to finish running. The processing can handle interruptions. The company will run the job every weekend for the next 6 months.
Which EC2 instance purchasing option will meet these requirements MOST cost-effectively?
- A. Spot Instances Correct
- B. Reserved Instances
- C. On-Demand Instances
- D. Dedicated Instances
Explanation
Spot Instances use spare EC2 capacity at a steep discount compared with On-Demand prices, and AWS can reclaim them with a two-minute warning. Because this 90-minute weekend batch job can tolerate interruptions, Spot is the most cost-effective option. Reserved Instances require a 1- or 3-year commitment and would sit idle most of the week, On-Demand costs more, and Dedicated Instances add cost for hardware isolation that is not required.
