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Difficulty: EasyCost-Optimized Compute Selection and Purchasing Strategies

A company hosts a production application on AWS that uses Amazon EC2 instances for web servers and Amazon RDS for its relational database. Both services run continuously throughout the year. The company wants to reduce costs by purchasing a Compute Savings Plan. Which of the following statements is true regarding how this purchasing strategy will affect their billing?

  1. The Compute Savings Plan will apply discounts to the Amazon EC2 instances, but it will not apply any discounts to the Amazon RDS database.Answer
  2. B
    The Compute Savings Plan will automatically apply discounts to both the Amazon EC2 instances and the Amazon RDS database.
  3. C
    The Compute Savings Plan will apply discounts to the Amazon RDS database, but the Amazon EC2 instances must be covered by a separate EC2 Instance Savings Plan.
  4. D
    The Compute Savings Plan will apply discounts to the Amazon RDS database first, and then apply any remaining commitment to the Amazon EC2 instances.

Answer

The Compute Savings Plan will apply discounts to the Amazon EC2 instances, but it will not apply any discounts to the Amazon RDS database.
The correct option is that the Compute Savings Plan applies discounts to the Amazon EC2 instances but does not apply any discounts to the Amazon RDS database. This is because Compute Savings Plans cover EC2, AWS Fargate, and AWS Lambda usage, but do not extend to database services like Amazon RDS.

Step-by-Step Solution

1
Identify the services included in the company's architecture.
The architecture consists of Amazon EC2 instances and an Amazon RDS database.
To apply the correct purchasing model, we need to know which AWS services are in use.
2
Determine the coverage scope of a Compute Savings Plan.
Compute Savings Plans apply to EC2 instances (regardless of family, size, AZ, region, OS, or tenancy), AWS Fargate, and AWS Lambda.
Understanding what services are eligible for Savings Plans helps identify which part of the infrastructure will receive the discount.
3
Evaluate the eligibility of Amazon RDS for Compute Savings Plans.
Amazon RDS is a database service and is not covered by Compute Savings Plans. It requires RDS Reserved Instances (RIs) for commitment-based discounts.
Identifying the limitations of Compute Savings Plans ensures that the database is excluded from the Savings Plan discount.

Key Concept

Compute Savings Plans apply to EC2, Fargate, and Lambda, but do not cover database services like Amazon RDS.
Estimated Time:45s
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Topics

Cost-Optimized Compute Selection and Purchasing Strategies