Scaling MoE reinforcement learning on Amazon EKS with EFA and DeepEP with 40% more throughput

What moved

Learn how to scale Mixture-of-Experts (MoE) reinforcement learning on Amazon EKS using Elastic Fabric Adapter (EFA) and DeepEP. This post presents an architecture that combines Amazon EKS, EFA, and Amazon S3 and increased aggregate reinforcement learning rollout throughput by 40% for large-scale RLHF and GRPO training.

Why it matters

Filed as a public note from AWS, 2026-09-25.

On the record

• Filed from the AWS official RSS on 2026-09-25.
• Primary source host: aws.amazon.com.
• Learn how to scale Mixture-of-Experts (MoE) reinforcement learning on Amazon EKS using Elastic Fabric Adapter (EFA) and DeepEP.