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Zorluk: OrtaAWS Pricing Models

A manufacturing company is planning the migration of two distinct workloads to Amazon EC2. The first workload is a core Enterprise Resource Planning (ERP) database that must run continuously 24/7 with consistent, predictable performance for at least three years. The second workload is a daily supply chain simulation batch job that runs overnight for 3 hours; this simulation is designed to be fault-tolerant and can be interrupted and resumed later without impact. Which two Amazon EC2 pricing models should the company select to minimize costs for these workloads? (Select TWO.)

  1. Reserved Instances for the ERP database workloadCevap
  2. Spot Instances for the supply chain simulation workloadCevap
  3. C
    On-Demand Instances for the ERP database workload
  4. D
    Spot Instances for the ERP database workload
  5. E
    Reserved Instances for the supply chain simulation workload

Cevap

The correct pricing models are Reserved Instances for the ERP database workload and Spot Instances for the supply chain simulation workload.
For the ERP database workload, which runs continuously 24/7 with predictable performance requirements for at least three years, Reserved Instances provide the best combination of pricing discount and capacity guarantees. For the supply chain simulation batch job, which runs for only 3 hours daily and is designed to be fault-tolerant (capable of being interrupted and resumed), Spot Instances provide the greatest cost savings by utilizing spare EC2 capacity.

Adım Adım Çözüm

1
Analyze the requirements for the ERP database workload.
The database runs continuously 24/7, requires predictable performance, and has a defined timeline of at least three years.
Identifying the continuous and long-term nature of this workload helps select a commitment-based pricing model for cost optimization.
2
Determine the optimal pricing model for the ERP database.
Reserved Instances (or Savings Plans) are selected.
Reserved Instances offer significant discounts (up to 72%) over On-Demand rates in exchange for a 1-year or 3-year commitment, fitting the ERP database requirements perfectly.
3
Analyze the requirements for the supply chain simulation workload.
The workload runs for 3 hours daily, is a batch job, and is fault-tolerant (can be interrupted and resumed).
Understanding that the workload is flexible and can handle interruptions allows the use of spare capacity pricing models.
4
Determine the optimal pricing model for the supply chain simulation.
Spot Instances are selected.
Spot Instances utilize spare AWS capacity at up to a 90% discount compared to On-Demand. Because the batch job is interruptible and short-lived, it can tolerate potential Spot Instance terminations to achieve maximum cost savings.

Anahtar Kavram

Selecting the most cost-effective Amazon EC2 pricing model based on workload characteristics such as predictability, duration, and fault tolerance.
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AWS Pricing Models

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