Exam AWS Certified Solutions Architect - Associate SAA-C03 topic 1 question 347 discussion

Read Carefully guys , They need to be able to change FAMILY , and although EC2 Savings has a higher discount , its clearly documented as not allowed > EC2 Instance Savings Plans provide savings up to 72 percent off On-Demand, in exchange for a commitment to a specific instance family in a chosen AWS Region (for example, M5 in Virginia). These plans automatically apply to usage regardless of size (for example, m5.xlarge, m5.2xlarge, etc.), OS (for example, Windows, Linux, etc.), and tenancy (Host, Dedicated, Default) within the specified family in a Region.

https://docs.aws.amazon.com/whitepapers/latest/cost-optimization-reservation-models/savings-plans.html Compute Savings Plans provide the most flexibility and help to reduce your costs by up to 66% (just like Convertible RIs). These plans automatically apply to EC2 instance usage regardless of instance family... EC2 Instance Savings Plans provide the lowest prices, offering savings up to 72% (just like Standard RIs) in exchange for commitment to usage of individual instance families Instance Savings "locks" you in that instance family which is not desired by the company hence A is the best plan as they can change the instance family anytime

EC2 Instance Savings Plans provide the lowest prices, offering savings up to 72% in exchange for commitment to usage of individual instance families in a region (e.g. M5 usage in N. Virginia). This automatically reduces your cost on the selected instance family in that region regardless of AZ, size, OS or tenancy. ***EC2 Instance Savings Plans give you the flexibility to change your usage between instances within a family in that region.*** For example, you can move from c5.xlarge running Windows to c5.2xlarge running Linux and automatically benefit from the Savings Plans prices. https://aws.amazon.com/savingsplans/faq/#:~:text=EC2%20Instance%20Savings%20Plans%20give,from%20the%20Savings%20Plans%20prices.

B is the definite answer

B does not allow changing the instance family, despite all the ChatGPT-based answers claiming the opposite

While EC2 Instance Savings Plans also provide cost savings over On-Demand pricing, they offer less flexibility in terms of changing instance families. They provide a discount in excha

EC2 Instance Savings Plans is most saving. And it is enough for required flexibility EC2 Instance Savings Plans provide the lowest prices, offering savings up to 72% (just like Standard RIs) in exchange for commitment to usage of individual instance families in a Region (for example, M5 usage in N. Virginia). This automatically reduces your cost on the selected instance family in that region regardless of AZ, size, operating system, or tenancy. EC2 Instance Savings Plans give you the flexibility to change your usage between instances within a family in that Region. For example, you can move from c5.xlarge running Windows to c5.2xlarge running Linux and automatically benefit from the Savings Plans prices.

https://docs.aws.amazon.com/whitepapers/latest/cost-optimization-reservation-models/savings-plans.html

The most cost-effective solution that meets the company's requirements would be B. EC2 Instance Savings Plan. EC2 Instance Savings Plans provide significant cost savings, allowing the company to commit to a consistent amount of usage (measured in $/hour) for a 1- or 3-year term, and in return, receive a discount on the hourly rate for the instances that match the attributes of the plan. With EC2 Instance Savings Plans, the company can benefit from the flexibility to change the instance family and sizes over the next 3 years, which aligns with their requirement to adjust based on application popularity and usage. This option provides the best balance of cost savings and flexibility, making it the most suitable choice for the company's needs.

Change instance family = Compute Savings Plans

D is not right. D. Standard Reserved Instances. should be Convertible Reserved Instances if you need additional flexibility, such as the ability to use different instance families, operating systems.

The key factors are: Need to maximize cost savings over 3 years Ability to change instance family and sizes in 6 months Standardized on a particular instance family for now

Why not C? Can do with Convertible Reserved Instance https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/reserved-instances-types.html

https://aws.amazon.com/savingsplans/compute-pricing/

EC2 Instance Savings Plan cannot change the family. https://docs.aws.amazon.com/savingsplans/latest/userguide/what-is-savings-plans.html

Anser D: You can use Standard Reserved Instances when you know that you need a specific instance type.

Savings Plans offer a flexible pricing model that provides savings on AWS usage. You can save up to 72 percent on your AWS compute workloads. Compute Savings Plans provide lower prices on Amazon EC2 instance usage regardless of instance family, size, OS, tenancy, or AWS Region. This also applies to AWS Fargate and AWS Lambda usage. SageMaker Savings Plans provide you with lower prices for your Amazon SageMaker instance usage, regardless of your instance family, size, component, or AWS Region. https://docs.aws.amazon.com/savingsplans/latest/userguide/what-is-savings-plans.html