Linux

Instead of picking one model per task, I made three machines cooperate: a big thinking model for primary reasoning, a fast local 27B for subagent loops and images, a router with automatic failover in front of everything, and shared agent memory. Total cost: electricity. Here is the full architecture, the benchmarks, and the lessons learned the hard way.

I chased a modprobe error across two DGX Spark nodes, peeled back layers of Secure Boot signing and kernel build flags, read the nvidia_peermem source code, and discovered that GPUDirect RDMA is architecturally unsupported on the GB10 Grace Blackwell SoC. Here’s the full story.