# SkyPilot says rack-aware scheduling makes 27% more NVL72 capacity usable

> Source: <https://runtimewire.com/article/skypilot-nvl72-topology-aware-scheduling-capacity>
> Published: 2026-10-29 18:06:49+00:00

# SkyPilot says rack-aware scheduling makes 27% more NVL72 capacity usable

**Its model favors 16-node slices with two spare nodes per rack; a separate GR00T training test reported 14.4% higher throughput.**

        By [RuntimeWire Staff](https://runtimewire.com/author/runtimewire-staff)
        · Published 

Primary source: [Hacker News](https://skypilot.ai/blog/grace-blackwell-needs-a-new-scheduler)

## Why it matters

NVL72 turns a rack into a high-bandwidth computing domain, so scheduler decisions can affect both job speed and how much capacity survives failures.

SkyPilot says its scheduler can make 27% more capacity usable in NVIDIA NVL72 clusters by leaving two nodes in each rack available as spares. The claim, published in a [technical post on October 29th](https://skypilot.ai/blog/grace-blackwell-needs-a-new-scheduler?ref=runtimewire), is about how operators allocate existing machines, not a hardware upgrade: in the model SkyPilot cites, 16-node job slices yield 2,037 usable nodes across 128 racks, compared with 1,602 when jobs consume all 18 nodes in each rack.…

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