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Difficulty: EasyAWS Pricing Models

An agricultural technology company is deploying two new workloads on Amazon EC2: a public website that must run continuously with predictable, steady-state traffic, and a batch data analysis task that can be paused and resumed at any time without impact. Which two AWS pricing models would provide the most cost-effective solution for these workloads? (Select TWO.)

  1. Spot Instances for the data analysis taskAnswer
  2. Reserved Instances for the public websiteAnswer
  3. C
    On-Demand Instances for the data analysis task
  4. D
    Spot Instances for the public website
  5. E
    Reserved Instances for the data analysis task to convert the compute costs from Operating Expenses (OpEx) into Capital Expenses (CapEx)

Answer

The correct pricing models are Reserved Instances for the public website and Spot Instances for the data analysis task.
Reserved Instances are ideal for predictable, steady-state workloads because they offer a substantial discount compared to On-Demand pricing in exchange for a commitment. Spot Instances are ideal for flexible, interruptible workloads because they utilize spare AWS capacity at the lowest possible cost.

Step-by-Step Solution

1
Analyze the requirements for the public website workload.
The website requires continuous, predictable, and steady-state operation, pointing to Reserved Instances as the most cost-effective option.
Reserved Instances offer significant discounts for continuous workloads with a commitment.
2
Analyze the requirements for the batch data analysis task.
The batch task is flexible, can be paused/resumed, and does not require continuous uptime, pointing to Spot Instances as the most cost-effective option.
Spot Instances offer up to a 90% discount for interruptible, fault-tolerant workloads.

Key Concept

Selecting cost-effective Amazon EC2 pricing models based on workload requirements.
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Topics

AWS Pricing Models

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