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Gaurav Desai

Gaurav Desai

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    Jupiter Rising: A Decade of Clos Topologies and Centralized Control in Google’s Datacenter Network
    Joon Ong
    Amit Agarwal
    Glen Anderson
    Ashby Armistead
    Roy Bannon
    Seb Boving
    Paulie Germano
    Jeff Provost
    Jason Simmons
    Eiichi Tanda
    Jim Wanderer
    Amin Vahdat
    Sigcomm '15, Google Inc (2015)
    Preview abstract We present our approach for overcoming the cost, operational complexity, and limited scale endemic to datacenter networks a decade ago. Three themes unify the five generations of datacenter networks detailed in this paper. First, multi-stage Clos topologies built from commodity switch silicon can support cost-effective deployment of building-scale networks. Second, much of the general, but complex, decentralized network routing and management protocols supporting arbitrary deployment scenarios were overkill for single-operator, pre-planned datacenter networks. We built a centralized control mechanism based on a global configuration pushed to all datacenter switches. Third, modular hardware design coupled with simple, robust software allowed our design to also support inter-cluster and wide-area networks. Our datacenter networks run at dozens of sites across the planet, scaling in capacity by 100x over ten years to more than 1Pbps of bisection bandwidth. View details
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