provisioning

Each layer depends on the ones below it and a mistake at the bottom shows up six layers higher as something else entirely. The order, the dependency almost everyone gets wrong on Blackwell systems, and the validation ladder that keeps a fault attributable to one node instead of five hundred.

One is a write burst of terabytes in a minute followed by half an hour of silence; the other is a steady read that never stops and never spikes. Provisioning for the peak of the first wastes most of its capacity, and provisioning for the average of the second fails the moment a checkpoint lands.

A GPU cloud sells whole nodes and fabric slices to tenants who expect them in minutes and expect them to work. The node state machine, the reconciler that keeps thousands converging, the isolation lines on shared fabric, the health loop that pulls a bad node first, and billing that survives a control-plane outage.