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Difficulty: EasyHigh-Performing and Elastic Compute Solutions

A research group is deploying a molecular dynamics analysis platform on Amazon EC2. The application requires tightly-coupled, node-to-node communication with minimal network latency. Additionally, a web-based administration console running on port 9090 on the same instances needs to receive traffic via an Application Load Balancer (ALB). Which two configurations should the solutions architect select to satisfy these requirements? (Select two.)

  1. Launch the EC2 instances in a cluster placement group.Answer
  2. Configure the ALB target group's health checks to use port 9090.Answer
  3. C
    Launch the EC2 instances in a spread placement group.
  4. D
    Configure the ALB target group's health checks to use the default port 80.
  5. E
    Launch the EC2 instances in a partition placement group.

Answer

Launch the EC2 instances in a cluster placement group and configure the ALB target group's health checks to use port 9090.
The correct options are launching the instances in a cluster placement group to meet the low-latency network requirement, and configuring the target group health checks on port 9090 so that the ALB correctly verifies the status of the admin console.

Step-by-Step Solution

1
Identify the network latency requirement.
Tightly-coupled compute nodes require microsecond-level network latency.
This indicates that a cluster placement group is necessary to keep instances physically close on the underlying hardware.
2
Identify the application port configuration.
The web-based administration console is listening on port 9090.
This requires the Application Load Balancer target group to perform health checks on port 9090 rather than the default HTTP port 80.

Key Concept

Low-latency instance placement and correct ELB health check port alignment
Estimated Time:1m 30s
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Topics

High-Performing and Elastic Compute Solutions

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