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Kefei Liu

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Book Open access Aug 2026

Dragonfly-Ultra: A Scalable, Low-Cost Network Architecture for High-Performance AI Clusters

Dragonfly-Ultra is presented, a scalable, low-cost network architecture for high-performance AI clusters that can scale to over 260k GPUs with only 82% cost and 81% power consumption of a 3-layer Clos architecture and incorporates three key mechanisms to further improve network performance and optimize collective communication.

Rui Zhuang, Hui Yuan, Junye Zhang et al. · 0 citations
#small language model Book Open access Aug 2026

Evaluating Link-level Lossless Mechanisms in AI Networks

Evaluation results show that, while these mechanisms consume a small amount of link bandwidth, CBFC can greatly reduce receive buffer utilization, and LLR can substantially mitigate network performance degradation caused by packet corruption.

Kefei Liu, Ruixue Wang, Tianrun Jiang et al. · 0 citations