Distributed training with Ray Train DLCs and EFA on EKS

AWS provides a prebuilt Ray Train Deep Learning Container (DLC) that includes CUDA, PyTorch, NCCL, EFA libraries, and Ray, simplifying distributed PyTorch training on Kubernetes clusters managed by KubeRay on Amazon EKS. This container enables scalable, multi-node GPU training with minimal setup, demonstrated by fine-tuning the Qwen2.5-1.5B model.