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arXiv · 2302.07217

PolarStar: Expanding the Scalability Horizon of Diameter-3 Networks

Kartik Lakhotia·Laura Monroe·Kelly Isham·Maciej Besta·Nils Blach·Torsten Hoefler·Fabrizio Petrini
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Abstract

We present PolarStar, a novel family of diameter-3 network topologies derived from the star product of low-diameter factor graphs. PolarStar gives the largest known diameter-3 network topologies for almost all radixes, thus providing the best known scalable diameter-$3$ network. Compared to current state-of-the-art diameter-$3$ networks, PolarStar achieves $1.3\times$ geometric mean increase in scale over Bundlefly, $1.9\times$ over Dragonfly, and $6.7\times$ over {3-D} HyperX. PolarStar has many other desirable properties, including a modular layout, large bisection, high resilience to link failures and a large number of feasible configurations for every radix. We give a detailed evaluation with simulations of synthetic and real-world traffic patterns and show that PolarStar exhibits comparable or better performance than current diameter-3 networks.

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Kartik Lakhotia, Laura Monroe, Kelly Isham, Maciej Besta, Nils Blach, Torsten Hoefler, Fabrizio Petrini. 2023-02-14. PolarStar: Expanding the Scalability Horizon of Diameter-3 Networks. https://doi.org/10.1145/3626183.3659975

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