Exam AWS Certified Cloud Practitioner CLF-C02 topic 1 question 521 discussion

For a company that is planning a partial migration to a serverless architecture in the next year and wants to pay for resources up front to optimize costs, the best AWS purchasing option is: D. Compute Savings Plan The other options are less suitable for this scenario: A. Convertible Reserved Instances are a billing discount applied to specific EC2 instances and do not provide flexibility for serverless workloads. B. Spot Instances are suitable for fault-tolerant and flexible workloads but do not offer the ability to pay upfront for a commitment period. C. EC2 Instance Savings Plans provide discounts on EC2 instances only and do not extend to serverless services like Lambda or Fargate. By choosing a Compute Savings Plan and paying upfront, the company can optimize costs for their current EC2 usage and seamlessly transition to serverless services as their migration progresses, without losing the committed savings. This flexibility aligns well with their planned partial migration to a serverless architecture.

good answer

Convertible Reserved Instances (RIs) allow customers to purchase EC2 capacity at a discounted rate compared to On-Demand pricing while providing the flexibility to change instance families, operating systems, or tenancies during the term of the reservation. This flexibility makes it ideal for a company that plans to migrate partially to serverless architecture, as it can adjust its RIs to match changing requirements over time. The upfront payment option can further optimize costs. Compute Savings Plans provide discounts on compute services, offering the flexibility to switch between EC2, AWS Lambda, and Fargate. However, they are better suited for fully serverless or containerized migrations rather than for managing upfront costs or EC2-focused workloads in a transitional phase.

D. Compute Savings Plan - most flexible

A. Convertible Reserved Instances

Compute Savings Plans offer discounts on a variety of AWS compute services, including: Amazon EC2 AWS Fargate AWS Lambda Amazon ECS Answer is D. Compute Savings Plan

Convertible Reserved Instances provide flexibility for a company that is planning a partial migration to a serverless architecture. They allow the company to change the instance type, operating system, or tenancy during the term, offering more flexibility compared to Standard Reserved Instances

SERVERLESS = Compute Saving Plans

D. Compute Savings Plans : provide the most flexibility because they apply to a wide range of compute usage across Amazon EC2, AWS Lambda, and AWS Fargate. This is especially beneficial for a company transitioning to a serverless architecture, as it allows them to benefit from cost savings across different AWS services, not just EC2. It also allows the company to commit to a consistent amount of usage (measured in dollars per hour) for a one- or three-year term, optimizing their costs.

D. Compute Savings Plan Compute Savings Plans offer discounts on a variety of AWS compute services, including: Amazon EC2 AWS Fargate AWS Lambda Amazon ECS This makes them a flexible option for companies transitioning to a serverless architecture while still optimizing costs.

The Convertible Reserved Instances option is the best choice because it allows the company to pay for resources up front, while also providing the flexibility to adjust their Reserved Instance purchases as they migrate to a serverless architecture. This flexibility is crucial as the company plans a partial migration, and Convertible Reserved Instances can help optimize their costs during this transition period.

C is correct and not D because its only a PARTIAL migration to serverless architecture