{"id":242636,"date":"2016-07-02T20:07:49","date_gmt":"2016-07-03T03:07:49","guid":{"rendered":"https:\/\/www.microsoft.com\/en-us\/research\/?post_type=msr-project&p=242636"},"modified":"2020-03-13T16:48:24","modified_gmt":"2020-03-13T23:48:24","slug":"projector-agile-reconfigurable-data-center-interconnect","status":"publish","type":"msr-project","link":"https:\/\/www.microsoft.com\/en-us\/research\/project\/projector-agile-reconfigurable-data-center-interconnect\/","title":{"rendered":"ProjecToR: Agile Reconfigurable Data Center Interconnect"},"content":{"rendered":"
ProjecToR is a novel, free-space optics based approach for building data center interconnects. It uses a digital micromirror device (DMD) and mirror assembly combination as a transmitter and a photodetector on top of the rack as a receiver. Our approach enables all pairs of racks to establish direct links, and we can reconfigure such links (i.e., connect different rack pairs) within 12 \u00b5s. To carry traffic from a source to a destination rack, transmitters and receivers in our interconnect can be dynamically linked in millions of ways.<\/p>\n
We develop topology construction and routing methods to exploit this flexibility, including a flow scheduling algorithm that is a constant factor approximation to the offline optimal solution. Experiments with a small prototype point to the feasibility of our approach. Simulations using realistic data center workloads show that, compared to the conventional folded-Clos interconnect, our approach can improve mean flow completion time by 30-95% and reduce cost by 25-40%.<\/p>\n
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https:\/\/www.youtube.com\/watch?v=PXlo3sItgLw<\/p>\n
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