Table of Contents
Question
A company needs Amazon EC2 instances for a workload that can tolerate interruptions. Which EC2 instance purchasing option meets this requirement with the LARGEST discount compared to On-Demand prices?
A. Spot Instances
B. Convertible Reserved Instances
C. Standard Reserved Instances
D. Dedicated Hosts
Answer
A. Spot Instances
Explanation
To determine which EC2 instance purchasing option provides the largest discount compared to On-Demand prices, we need to analyze each option’s pricing model and their respective discounts. Here’s a detailed explanation of each option:
A. Spot Instances:
Spot Instances are a type of reserved instance that can be purchased at a significantly lower price than On-Demand instances. However, they have some limitations. Spot Instances are dynamic, meaning their prices can change every 5 minutes based on Amazon’s demand for computing capacity. If the demand increases, the price will rise, and if demand decreases, the price will fall. This makes Spot Instances a good option for workloads that can tolerate interruptions and price fluctuations.
Discount compared to On-Demand prices: Spot Instances offer the largest discount compared to On-Demand prices, typically ranging from 60% to 80% off the On-Demand price, depending on the instance type and the region.
B. Convertible Reserved Instances:
Convertible Reserved Instances are a type of reserved instance that allows you to convert your reserved instances to On-Demand instances if needed. This option provides more flexibility than Standard Reserved Instances, but it also comes with a slightly lower discount compared to On-Demand prices.
Discount compared to On-Demand prices: Convertible Reserved Instances offer a discount of around 30% to 50% off the On-Demand price, depending on the instance type and the region.
C. Standard Reserved Instances:
Standard Reserved Instances are a type of reserved instance that provides a fixed discount off the On-Demand price for a one- or three-year commitment. This option provides the most predictable pricing, but it also has the smallest discount compared to On-Demand prices.
Discount compared to On-Demand prices: Standard Reserved Instances offer a discount of around 10% to 30% off the On-Demand price, depending on the instance type and the region.
D. Dedicated Hosts:
Dedicated Hosts are a type of instance that you can reserve for your exclusive use. This option provides complete control over the underlying computing resources and can be more expensive than other options.
Discount compared to On-Demand prices: Dedicated Hosts do not offer any discount compared to On-Demand prices.
Based on the information provided, the option that meets the requirement of needing Amazon EC2 instances for a workload that can tolerate interruptions with the LARGEST discount compared to On-Demand prices is:
A. Spot Instances.
Spot Instances offer the largest discount compared to On-Demand prices, making them the most cost-effective option for workloads that can tolerate interruptions and price fluctuations.
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