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Omid Mashayekhi

Omid Mashayekhi

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    Jupiter Evolving: Transforming Google's Datacenter Network via Optical Circuit Switches and Software-Defined Networking
    Joon Ong
    Arjun Singh
    Mukarram Tariq
    Rui Wang
    Jianan Zhang
    Virginia Beauregard
    Patrick Conner
    Rishi Kapoor
    Stephen Kratzer
    Nanfang Li
    Hong Liu
    Karthik Nagaraj
    Jason Ornstein
    Samir Sawhney
    Ryohei Urata
    Lorenzo Vicisano
    Kevin Yasumura
    Shidong Zhang
    Junlan Zhou
    Proceedings of ACM SIGCOMM 2022
    Preview abstract We present a decade of evolution and production experience with Jupiter datacenter network fabrics. In this period Jupiter has delivered 5x higher speed and capacity, 30% reduction in capex, 41% reduction in power, incremental deployment and technology refresh all while serving live production traffic. A key enabler for these improvements is evolving Jupiter from a Clos to a direct-connect topology among the machine aggregation blocks. Critical architectural changes for this include: A datacenter interconnection layer employing Micro-ElectroMechanical Systems (MEMS) based Optical Circuit Switches (OCSes) to enable dynamic topology reconfiguration, centralized Software-Defined Networking (SDN) control for traffic engineering, and automated network operations for incremental capacity delivery and topology engineering. We show that the combination of traffic and topology engineering on direct-connect fabrics achieves similar throughput as Clos fabrics for our production traffic patterns. We also optimize for path lengths: 60% of the traffic takes direct path from source to destination aggregation blocks, while the remaining transits one additional block, achieving an average blocklevel path length of 1.4 in our fleet today. OCS also achieves 3x faster fabric reconfiguration compared to pre-evolution Clos fabrics that used a patch panel based interconnect. View details
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