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Zorluk: OrtaCost-Optimized Compute Selection and Purchasing Strategies

A logistics company operates a central distribution dashboard that consists of a fleet of Amazon ECS tasks running on AWS Fargate to handle constant, predictable API requests throughout the day. The backend stores shipment records in an Amazon RDS for PostgreSQL database instance that also runs continuously. The company wants to minimize compute costs for these resources without modifying the application code or architecture. Which combination of purchasing strategies should a solutions architect recommend to meet these requirements? (Select TWO.)

  1. Purchase a Compute Savings Plan to cover the AWS Fargate tasksCevap
  2. Purchase Amazon RDS Reserved Instances for the PostgreSQL databaseCevap
  3. C
    Purchase a Compute Savings Plan to cover the Amazon RDS database instance usage
  4. D
    Migrate the database to Amazon DynamoDB using Provisioned Capacity Mode to manage unpredictable query traffic
  5. E
    Migrate the API processing components to AWS Lambda to handle the constant, 24/7 requests

Cevap

Purchase a Compute Savings Plan to cover the AWS Fargate tasks, and purchase Amazon RDS Reserved Instances for the PostgreSQL database.
Purchasing a Compute Savings Plan provides significant savings for AWS Fargate compute usage, which fits the predictable API traffic profile. Purchasing Amazon RDS Reserved Instances provides a discounted hourly rate for the database instance, which runs continuously 24/7. Together, these strategies minimize compute costs for both components without requiring application modifications.

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1
Evaluate the compute options for the containerized API workload.
The AWS Fargate tasks run continuously with predictable resource needs. A Compute Savings Plan is selected as it directly covers Fargate usage and offers a significant discount.
Compute Savings Plans are flexible and apply automatically to Fargate, ECS, Lambda, and EC2 compute usage.
2
Evaluate the compute options for the database workload.
The PostgreSQL database runs continuously on Amazon RDS. Amazon RDS Reserved Instances are selected to reduce the hourly database instance cost.
Compute Savings Plans do not apply to Amazon RDS. RDS Reserved Instances must be purchased separately for RDS databases.
3
Compare against constraints and alternative purchasing models.
Alternative options such as migrating to AWS Lambda or DynamoDB are rejected because they either increase costs for 24/7 workloads or require major architectural modifications.
The scenario requires minimizing costs without modifying the application code or architecture.

Anahtar Kavram

Matching appropriate AWS purchasing models (Compute Savings Plans, RDS Reserved Instances) to specific compute and database workloads to maximize cost savings.
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Cost-Optimized Compute Selection and Purchasing Strategies