Day-0 deployment of Qwen3.8-Flash-Next (NVFP4) on 2x DGX Spark TP2 via SGLang. Includes the SM121 QSA kernel-guard fix, launcher, benchmarks, and full report.
Working recipe to serve DeepSeek-V4-Flash across two NVIDIA DGX Spark (GB10) nodes with vLLM (TP=2, FP8 KV, MTP) over a RoCE/RDMA link — Docker image, launch scripts, RDMA/NCCL setup, and the gotchas.