Halley: A Predictive Control Plane for Optical AI Data Center Networks
The paper presents Halley, a predictive control plane for optical networks in AI data center training clusters.
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- Primary sourceHugging Face
- Discovery linkHugging Face
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The paper presents Halley, a predictive control plane for optical networks in AI data center training clusters. It forecasts failures across four layers (laser pools, switches, microrings, and modules) and defers to the deployed policy when predictions are uncertain. In the authors' simulations, effective goodput rose from 65.2% to 76.5% when spare exhaustion cost a whole window, and to 67.4% when only affected channels lost bandwidth. Fallback circuits are reported as formally verified and tested on a commercial FPGA and a 130 nm signoff.
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Results are from simulation; source claims not independently checked, and the full paper was not verified beyond the supplied page text.
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In simulation, effective goodput rose from 65.2% to 76.5% when spare exhaustion lost the whole window.
Source: Hugging Face ↗Stored source-based brief · key point 1 · AINewsIQ paraphraseWhen only the affected channels lost bandwidth, simulated goodput reached 67.4%.
Source: Hugging Face ↗Stored source-based brief · key point 2 · AINewsIQ paraphraseHalley's four components each carry a stated formal guarantee, including a switch scheduling bound within 11/9 of optimal.
Source: Hugging Face ↗Stored source-based brief · key point 3 · AINewsIQ paraphraseFallback circuits are reported as formally verified and to achieve close timing on a commercial FPGA.
Source: Hugging Face ↗Stored source-based brief · key point 4 · AINewsIQ paraphraseLimits from the stored brief
Results are from simulation; source claims not independently checked, and the full paper was not verified beyond the supplied page text.
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Why this may matter
Optical interconnects are a bottleneck for large AI training runs, where a single failure can stall synchronized exchanges. A predictive control approach that preserves throughput and reduces required capacity could matter for data center efficiency, if the simulated gains hold in practice.
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Results are from simulation; source claims not independently checked, and the full paper was not verified beyond the supplied page text.
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