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Difficulty: MediumHigh-Performing and Elastic Compute Solutions

A biotechnology firm is deploying a distributed genomic sequencing analysis suite on Amazon EC2 instances within an Auto Scaling group. The processing nodes require low-latency, high-throughput network communication between each other to assemble DNA sequence fragments. A web-based management portal for the suite is hosted on the same instances and listens on custom TCP port 50005000. An Application Load Balancer (ALB) routes traffic to this portal. Which combination of configurations should a solutions architect implement to support this workload? (Choose two.)

  1. Launch the EC2 instances in a cluster placement group.Answer
  2. Configure the ALB target group health check port to 50005000.Answer
  3. C
    Launch the EC2 instances in a spread placement group.
  4. D
    Launch the EC2 instances in a partition placement group.
  5. E
    Configure the ALB target group health checks to use the default port 8080.

Answer

Launching the EC2 instances in a cluster placement group and configuring the Application Load Balancer target group health check port to 50005000.
The correct configurations are to launch the instances in a cluster placement group and configure the ALB target group health checks to use port 50005000. Launching instances in a cluster placement group places them close together inside a single Availability Zone, which minimizes latency and maximizes throughput for node-to-node communication. Configuring the health check port to match the custom application port (50005000) prevents the load balancer from incorrectly marking the instances as unhealthy.

Step-by-Step Solution

1
Analyze the networking requirements of the distributed genomic sequencing workload.
Identify the need for high-throughput, low-latency node-to-node communication.
Knowing the communication latency requirements directs the choice of the appropriate EC2 placement group.
2
Evaluate the EC2 placement group options based on latency needs.
Select a cluster placement group and reject spread or partition placement groups.
Cluster placement groups position instances within a single Availability Zone to achieve low-latency and high-throughput network performance.
3
Analyze the application routing and health check parameters.
Identify that the web portal listens on custom TCP port 50005000, requiring target group health checks to target port 50005000 instead of default port 8080.
Aligning the health check port with the application port prevents the load balancer from marking healthy nodes as offline.

Key Concept

Selecting the correct EC2 placement group and configuring load balancer health checks to match custom application ports.
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High-Performing and Elastic Compute Solutions

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