Which solution is the MOST cost-effective?

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In: SAA-C02
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With: 2 Comments
An application requires a development environment (DEV) and production environment (PROD) for several years.The DEV instances will run for 10 hours each day during normal business hours, while the PROD instances will run 24 hours each day.A solutions architect needs to determine a compute instance purchase strategy to minimize costs.

Which solution is the MOST cost-effective?

DEV with Spot Instances and PROD with On-Demand Instances

DEV with On-Demand Instances and PROD with Spot Instances

DEV with Scheduled Reserved Instances and PROD with Reserved Instances

DEV with On-Demand Instances and PROD with Scheduled Reserved Instances

Explanations:

Using Spot Instances for DEV may save costs, but Spot Instances can be interrupted, making them less reliable for a development environment. PROD requires high availability, making On-Demand Instances a better choice despite higher costs.

While On-Demand Instances for DEV provide reliability, using Spot Instances for PROD could lead to interruptions and downtime, which is unacceptable for production workloads.

DEV with Scheduled Reserved Instances fits perfectly as it runs only during business hours, providing cost savings. PROD with Reserved Instances ensures consistent availability 24/7 at a reduced rate compared to On-Demand pricing, optimizing costs for long-term usage.

DEV with On-Demand Instances is not cost-effective for a predictable schedule. Scheduled Reserved Instances for PROD would not provide the necessary 24/7 availability, leading to potential downtime.

2026-03-20

2 Comments

  1. Gabriel
    Author

    I value that the answer is:
    DEV with Scheduled Reserved Instances and PROD with Reserved Instances

  2. Carol
    Author

    If I’m not mistaken, the answer is:
    DEV with Scheduled Reserved Instances and PROD with Reserved Instances

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