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Zorluk: OrtaCost-Optimized Compute Selection and Purchasing Strategies

A financial services firm is migrating its core transaction processing platform to AWS. The architecture consists of two main components that will run continuously 24/7: a fleet of Amazon EC2 instances for the application layer, and an Amazon RDS for MySQL database. Both components have highly predictable compute requirements. The firm wants to commit to a 3-year term to achieve the maximum possible discount on their compute costs. Which combination of purchasing options offers the most cost-optimized solution?

  1. A
    Purchase a Compute Savings Plan to cover both the Amazon EC2 application fleet and the Amazon RDS database.
  2. Purchase a Compute Savings Plan for the Amazon EC2 application fleet, and purchase Amazon RDS Reserved Instances for the Amazon RDS database.Cevap
  3. C
    Purchase EC2 Instance Savings Plans to cover both the Amazon EC2 application fleet and the Amazon RDS database.
  4. D
    Purchase Amazon RDS Reserved Instances to cover both the Amazon RDS database and the Amazon EC2 application fleet.

Cevap

Purchase a Compute Savings Plan for the Amazon EC2 application fleet, and purchase Amazon RDS Reserved Instances for the Amazon RDS database.
The correct strategy combines a Compute Savings Plan for the EC2 application layer with RDS Reserved Instances for the database layer. This is necessary because AWS Compute Savings Plans apply discounts to EC2, AWS Lambda, and AWS Fargate, but they do not apply to Amazon RDS database instances, which must be covered under RDS Reserved Instances.

Adım Adım Çözüm

1
Analyze the compute requirements and services in the proposed architecture.
The architecture contains EC2 instances (for the application layer) and an RDS for MySQL database, both running 24/7.
Identifying the specific services allows selection of the appropriate AWS discount model for each resource type.
2
Evaluate the eligibility of each resource type under AWS Savings Plans.
Compute Savings Plans apply automatically to EC2, Fargate, and Lambda. They do not apply to Amazon RDS.
Savings Plans have a defined scope of services they cover, and Amazon RDS is excluded.
3
Identify the correct discount mechanism for the Amazon RDS database.
Amazon RDS database instances must be covered by RDS Reserved Instances to receive discounts.
RDS database workloads cannot use Savings Plans and must rely on database-specific Reserved Instances.
4
Select the combination of purchasing models that covers both services and maximizes the 3-year term discount.
Combine a Compute Savings Plan for EC2 and RDS Reserved Instances for RDS.
This matches each resource to its eligible purchasing option, ensuring maximum coverage and optimization.

Anahtar Kavram

AWS Savings Plans and Reserved Instances have distinct scopes of application; specifically, Compute Savings Plans do not cover Amazon RDS databases.
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Cost-Optimized Compute Selection and Purchasing Strategies