{"ID":2854579,"CreatedAt":"2026-06-01T04:54:23.091178241Z","UpdatedAt":"2026-06-01T04:54:23.091178241Z","DeletedAt":null,"paper_url":"https://arxiv.org/abs/2510.14580","arxiv_id":"2510.14580","title":"ScalePool: Hybrid XLink-CXL Fabric for Composable Resource Disaggregation in Unified Scale-up Domains","abstract":"This paper proposes ScalePool, a novel cluster architecture designed to interconnect numerous accelerators using unified hardware interconnects rather than traditional long-distance networking. ScalePool integrates Accelerator-Centric Links (XLink) and Compute Express Link (CXL) into a unified XLink-CXL hybrid fabric. Specifically, ScalePool employs XLink for intra-cluster, low-latency accelerator communication, while using hierarchical CXL-based switching fabrics for scalable and coherent inter-cluster memory sharing. By abstracting interfaces through CXL, ScalePool structurally resolves interoperability constraints, enabling heterogeneous cluster operation and composable resource disaggregation. In addition, ScalePool introduces explicit memory tiering: the latency-critical tier-1 combines accelerator-local memory with coherence-centric CXL and XLink, whereas the highcapacity tier-2 employs dedicated memory nodes interconnected by a CXL-based fabric, achieving scalable and efficient memory pooling. Evaluation results show that ScalePool accelerates LLM training by 1.22x on average and up to 1.84x compared to conventional RDMA-based environments. Furthermore, the proposed tier-2 memory disaggregation strategy reduces latency by up to 4.5x for memory-intensive workloads.","short_abstract":"This paper proposes ScalePool, a novel cluster architecture designed to interconnect numerous accelerators using unified hardware interconnects rather than traditional long-distance networking. ScalePool integrates Accelerator-Centric Links (XLink) and Compute Express Link (CXL) into a unified XLink-CXL hybrid fabric....","url_abs":"https://arxiv.org/abs/2510.14580","url_pdf":"https://arxiv.org/pdf/2510.14580v1","authors":"[\"Hyein Woo\",\"Miryeong Kwon\",\"Jiseon Kim\",\"Eunjee Na\",\"Hanjin Choi\",\"Seonghyeon Jang\",\"Myoungsoo Jung\"]","published":"2025-10-16T11:38:57Z","proceeding":"cs.DC","tasks":"[\"cs.DC\"]","methods":"[\"Large Language Model\"]","has_code":false}