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Difficulty: EasyHigh-Performing and Elastic Compute Solutions

A company is deploying a distributed application on Amazon EC2. The application requires the instances to be placed on distinct physical hardware racks to minimize correlated failures. Which EC2 configuration should the solutions architect select?

  1. A
    A cluster placement group
  2. A spread placement groupAnswer
  3. C
    An Amazon EBS gp3 volume with Multi-Attach enabled to share data across all instances
  4. D
    An Elastic Load Balancer target group using the default port 80 health check while the application runs on a custom port

Answer

A spread placement group
A spread placement group places instances on distinct physical hardware racks to reduce the risk of simultaneous failures. This is the recommended placement strategy when instances must be kept strictly isolated from each other at the hardware level.

Step-by-Step Solution

1
Identify the primary requirement, which is to place EC2 instances on distinct physical hardware racks to minimize correlated failures.
The requirement points to a spread placement strategy.
Spread placement groups ensure that each instance is placed on distinct racks with their own network and power source.
2
Evaluate the available EC2 placement group options and other configurations against this requirement.
A spread placement group is the correct choice, whereas cluster placement groups are for low-latency clustering and EBS/ELB options do not address instance placement.
Selecting the correct placement group directly addresses the resilience and physical isolation requirements.

Key Concept

EC2 Placement Groups
Estimated Time:45s
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Topics

High-Performing and Elastic Compute Solutions

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