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Zorluk: KolayAWS Pricing Models

An organization is planning to deploy two workloads on Amazon EC2: a stateless batch processing application that can be interrupted at any time and resumed later, and a development server that is run for only a few hours each day during active testing. Which of the following AWS pricing options represent the most cost-effective choices for these workloads? (Select TWO)

  1. Spot Instances to run the batch processing application at the lowest costCevap
  2. On-Demand Instances for the development server to pay only for the hours it is actively runningCevap
  3. C
    Reserved Instances for the development server to minimize costs for its short-term daily use
  4. D
    Spot Instances for the development server to ensure it is always available during testing
  5. E
    Dedicated Hosts for the batch processing application to reduce hardware licensing costs

Cevap

Spot Instances to run the batch processing application at the lowest cost, and On-Demand Instances for the development server to pay only for the hours it is actively running.
The correct options are the choices to use Spot Instances for the batch processing application, and On-Demand Instances for the development server. Spot Instances are ideal for flexible, interruptible, and stateless workloads because they offer spare AWS capacity at deep discounts. On-Demand Instances are perfect for short-term, unpredictable, or intermittent workloads like development servers because you only pay for the time the instance is running and can shut it down to stop billing, without any long-term commitment.

Adım Adım Çözüm

1
Analyze the requirements for the batch processing workload.
The batch processing workload is stateless, can be interrupted, and needs to be highly cost-optimized.
Since the workload can tolerate interruptions, it can take advantage of the steep discounts offered by utilizing spare capacity.
2
Determine the best pricing model for the batch processing workload.
Spot Instances are identified as the most cost-effective fit because they provide spare capacity at up to 90% off On-Demand rates.
Spot Instances fit workloads that are flexible, stateless, and interruptible.
3
Analyze the requirements for the development server.
The development server runs for only a few hours per day and requires reliable availability when the developer is testing.
The server needs to run without sudden interruptions during testing, but does not need to run 24/7.
4
Determine the best pricing model for the development server.
On-Demand Instances are identified as the most suitable fit since they can be stopped when not in use to avoid charges, with no long-term commitment.
Paying only for active hours via On-Demand is cheaper than committing to a 1- or 3-year term for a server that is mostly turned off.

Anahtar Kavram

Selecting optimal Amazon EC2 pricing models (Spot vs. On-Demand vs. Reserved vs. Dedicated) based on workload stability, predictability, and duration.
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AWS Pricing Models

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