Q33 — AWS SAP-C02 Ch.3

Question 33 of 75 | ← Chapter 3

Q258. A company has built a high performance computing (HPC) cluster in AWS for a tightly coupled workload that generates a large number of shared files stored in Amazon EFS. The cluster was performing well when the number of Amazon EC2 instances in the cluster was 100. However, when the company increased the cluster size to 1,000 EC2 instances, overall performance was well below expectations. Which collection of design choices should a solutions architect make to achieve the maximum performance from the HPC cluster? (Choose three.)

Correct Answer: A. Ensure the HPC cluster is launched within a single Availability Zone., C. Select EC2 instance types with an Elastic Fabric Adapter (EFA) enabled., F. Replace Amazon EFS with Amazon FSx for Lustre.

Explanation

As the HPC cluster is generating a large number of shared files stored in Amazon EFS, the solutions architect should make the following design choices to achieve maximum performance from the HPC cluster: A. Ensure the HPC cluster is launched within a single Availability Zone to minimize network latency and improve I/O performance. C. Select EC2 instance types with an Elastic Fabric Adapter (EFA) enabled as they provide low-latency inter-instance communication required for HPC workloads. F. Replace Amazon EFS with Amazon FSx for Lustre as it provides high-performance file storage that is optimized for HPC workloads. Option B is not relevant to the given scenario as attaching elastic network interfaces in multiples of four has no direct impact on the performance of an HPC cluster running in AWS. Option D can lead to increased network latency due to cross-Availability Zone communication, which can negatively impact the performance of an HPC cluster. Option E is not recommended as using multiple Amazon EBS volumes in a RAID array may increase the complexity of managing storage and result in higher costs compared to Amazon FSx for Lustre.