Which EC2 configuration meets these requirements?
Launch the EC2 instances in a cluster placement group in one Availability Zone.
Launch the EC2 instances in a spread placement group in one Availability Zone.
Launch the EC2 instances in an Auto Scaling group in two Regions and peer the VPCs.
Launch the EC2 instances in an Auto Scaling group spanning multiple Availability Zones.
Explanations:
A cluster placement group is designed for applications that require high network performance with low latency and high throughput, as it places instances physically close to each other.
A spread placement group is intended to reduce the risk of simultaneous failures by spreading instances across different hardware, which may increase latency and reduce throughput for frequent communications.
Launching instances in two Regions introduces network latency and complexity, which does not meet the requirement for low latency and high throughput. Peering VPCs across Regions would not provide optimal performance for HPC workloads.
While an Auto Scaling group spanning multiple Availability Zones provides high availability and fault tolerance, it does not guarantee the low latency and high throughput required for HPC workloads, as instances could be spread out over larger distances.
To the best of my knowledge, the answer is:
Launch the EC2 instances in a cluster placement group in one Availability Zone.