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Difficulty: EasyAWS Pricing Models

A startup needs to run two distinct workloads on Amazon EC2: a primary application database that must run continuously 24/7 with a predictable, steady-state baseline, and a data-cleansing batch process that is fault-tolerant and can be run at any time. Which two AWS pricing models should the company select to minimize costs for these workloads?

  1. Amazon EC2 Reserved InstancesAnswer
  2. Amazon EC2 Spot InstancesAnswer
  3. C
    Amazon EC2 On-Demand Instances
  4. D
    Amazon EC2 Dedicated Hosts
  5. E
    AWS Budgets

Answer

Amazon EC2 Reserved Instances and Amazon EC2 Spot Instances are the most cost-effective choices for the continuous 24/7 database and the fault-tolerant batch process, respectively.
Reserved Instances and Spot Instances are the optimal combination. Reserved Instances provide substantial savings for the continuous, predictable database workload through a commitment discount, while Spot Instances offer the deepest discount for the flexible, fault-tolerant batch processing workload.

Step-by-Step Solution

1
Analyze the requirements of the database workload.
The database workload is steady-state, predictable, and runs continuously 24/7.
Steady-state continuous workloads benefit most from commitment-based discounts like Reserved Instances or Savings Plans.
2
Analyze the requirements of the data-cleansing batch process workload.
The batch process is fault-tolerant and can run at any time.
Workloads that can tolerate interruption and have flexible start times are the primary use case for Spot Instances to achieve maximum cost savings.

Key Concept

AWS Pricing Models
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Topics

AWS Pricing Models

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