Tuning Gemma 4 on a DGX Spark with vLLM: NVFP4, MTP and a Reboot-Proof Endpoint
A measured, step-by-step walkthrough of tuning Gemma 4 26B-A4B on a shared DGX Spark: host prep, quantization A/Bs, MTP speculative decoding, a one-hour soak and a reboot test, with every number and the mistakes that cost the most time.