Learn how to optimize compute costs for an organization with unpredictable demand across multiple AWS accounts using a Compute Savings Plan.
Table of Contents
Question
A company runs many workloads on AWS and uses AWS Organizations to manage its accounts. The workloads are hosted on Amazon EC2. AWS Fargate. and AWS Lambda. Some of the workloads have unpredictable demand. Accounts record high usage in some months and low usage in other months.
The company wants to optimize its compute costs over the next 3 years. A solutions architect obtains a 6-month average for each of the accounts across the organization to calculate usage.
Which solution will provide the MOST cost savings for all the organization’s compute usage?
A. Purchase Reserved Instances for the organization to match the size and number of the most common EC2 instances from the member accounts.
B. Purchase a Compute Savings Plan for the organization from the management account by using the recommendation at the management account level.
C. Purchase Reserved Instances for each member account that had high EC2 usage according to the data from the last 6 months.
D. Purchase an EC2 Instance Savings Plan for each member account from the management account based on EC2 usage data from the last 6 months.
Answer
B. Purchase a Compute Savings Plan for the organization from the management account by using the recommendation at the management account level.
Explanation
To optimize the compute costs for the organization, the solutions architect should consider purchasing a Compute Savings Plan. This plan provides the most cost savings for a variety of compute usage scenarios, including Amazon EC2, AWS Fargate, and AWS Lambda. By purchasing a Compute Savings Plan at the organization level, the company can apply the savings across all member accounts. This approach provides the most flexibility and cost savings for the organization as a whole.
Reserved Instances (RIs) are only applicable to Amazon EC2 instances and do not provide cost savings for AWS Fargate or AWS Lambda. Additionally, purchasing RIs for each member account or for the most common EC2 instances may not provide the most cost savings if the usage patterns change over time. A Compute Savings Plan provides more flexibility and can be applied to any compute usage within the organization.
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