SAP-C02 Question 527
Single answerA company is running a fleet of EC2 instances that support a critical application. The application has a predictable and consistent workload that will run for at least three years. The company is looking to optimize costs while ensuring the required capacity is secured. Which pricing model would be the most cost-effective and appropriate for this scenario?
- A
Spot Instances
- B
On-Demand Instances
- C
Savings Plans
- D
Reserved Instances
Show answer and explanation
Correct answer: D
Explanation
Reserved Instances are the most appropriate pricing model for this scenario because they align with the company's need for cost optimization and capacity assurance for a predictable, consistent workload over a long period (three years). Unlike Spot Instances or On-Demand Instances, Reserved Instances provide better cost savings and reliability for such use cases. Savings Plans can reduce costs but do not offer the capacity reservation that Reserved Instances provide.
- A. Incorrect.
Spot Instances are not suitable for consistent workloads because they can be interrupted at any time if the spot price exceeds the bid price. This makes them unreliable for critical applications.
- B. Incorrect.
On-Demand Instances provide flexibility but are the most expensive option for long-term, predictable workloads. They are better suited for unpredictable or short-term workloads.
- C. Incorrect.
Savings Plans can reduce costs for consistent usage but do not guarantee capacity. For predictable workloads requiring capacity assurance, Reserved Instances are more suitable.
- D. Correct.
Reserved Instances are ideal for consistent, predictable workloads where the commitment to a long-term duration (e.g., one or three years) ensures significant cost savings and capacity reservation.