https://route179.dev/tags/rdma/ Recent content in Rdma on Route179 Hugo en-us 2026 Sheng Chen Tue, 21 Jul 2026 10:00:00 +1000 https://route179.dev/2026/07/21/dgx-spark-nccl-roce-benchmarking/ Tue, 21 Jul 2026 10:00:00 +1000 https://route179.dev/2026/07/21/dgx-spark-nccl-roce-benchmarking/ <p>I&rsquo;ve been running a single DGX Spark (GB10) as an EKS Hybrid Node for a while, and recently a second one landed on my desk. The plan is to stack the two Sparks with one QSFP112 cable to create a little two-node EKS Hybrid cluster for distributed inference. This post documents how to set up RoCE/RDMA networking and perform NCCL testing across the two Spark nodes, including all lessons learned.</p>