SAA-C03 Q350 · Compute

Question

A solutions architect needs to design a solution for a high performance computing (HPC) workload. The solution must include multiple Amazon EC2 instances. Each EC2 instance requires 10 Gbps of bandwidth individually for single-flow traffic. The EC2 instances require an aggregate throughput of 100 Gbps of bandwidth across all EC2 instances. Communication between the EC2 instances must have low latency. Which solution will meet these requirements?

Accepted Answer

**Answer A** satisfies every requirement:

1. **10 Gbps single-flow traffic per instance**: Elastic Fabric Adapter (EFA) supports up to 100 Gbps of network bandwidth (depending on instance type) and is specifically designed for HPC workloads. EFA bypasses the OS kernel networking stack using OS-bypass capabilities, enabling high single-flow throughput.

2. **100 Gbps aggregate throughput**: A cluster placement group places instances on the same underlying high-bisection-bandwidth network segment, enabling full aggregate throughput between instances.

3. **Low latency**: A **cluster placement group** packs instances physically close together within a **single Availability Zone** (and therefore a single subnet). This minimizes network hops and provides the lowest possible inter-instance late

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