June 27, 2026 RailX: A Flexible, Scalable, and Low-Cost Network Architecture for Hyper-Scale LLM Training Systems 基于哈密顿分解的电路交换网络架构，支持超大规模 LLM 训练的灵活、可扩展、低成本互连 network-architecture distributed-training circuit-switching scalability llm-training