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CRON: Cyber-infrastructure for Reconfigurable Optical Networks

The CRON (Cyber-infrastructure for Reconfigurable Optical Networks) project, led by Seung-Jong Park and co-PIs, focuses on building a robust experimental networking testbed that supports 10Gbps high-speed networks. This initiative aims to enable large-scale scientific research and ensure optimal resource sharing without interference. With experimental results showing aggregated throughput of up to 9Gbps, CRON addresses challenges including scarce resources and uncontrollable networking environments. It bridges the gap between physical networks and advanced computational resources for diverse scientific applications.

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CRON: Cyber-infrastructure for Reconfigurable Optical Networks

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  1. CRON: Cyber-infrastructure for Reconfigurable Optical Networks PI: Seung-Jong Park, co-PI: Rajgopal Kannan GRA: Cheng Cui, Lin Xue, Mohammed Azad, P. Kondicoppa, and Chase Pierson Computer Science and Center for Computation & Technology • Introduction of CRON Federation of CRON with GENI Experimental Results(Y-shape topology) • Aggregated throughput between flows reaching 9Gbps • What is CRON? • Experimental Networking Testbed for 10Gbps High Speed Networks • Motivation of CRON • Challenges of experimentation over 10Gpbs production networks • Scarce and expensive resources • Limited access for network researchers • Interference to other production level traffic • uncontrollable networking environments • Horizontal Federation CRON with ProtoGENI@BBN • Emulab-based Component Manager & Slice Authority • Receiving user credentials • Register a slice at the Clearinghouse@Utah • Resource reservation between component managers • Creating slivers • Exchanging RSpec • Internet2 connection between CRON and ProtoGENI@BBN • Creating a vlan with ION service of Internet2 • (LONI : www.loni.bato.dcn.internet2.edu) • CRON Infrastructure • Goal : Bridging the gap between physical Networks and large scale • scientific research • Objectives : (1) Developing virtually shared 10Gbps networking and • high-end computing resources and • (2) Enabling large scale scientific experiments to share • CRON without mutual interference • Vertical Federation CRON with OnTimeMeasure@OSU • Integrating the OnTimeMeasure sliver on CRON experiment slice • Real time data diagnosis from CRON experiment slice • Components • Hardwares • Cisco N5000 switch • with 48 X 10Gbps ports • High-end servers with 10GE NICs • 10Gbps hardware emulators • Softwares • Emulab-based interface & controller • 10Gbps software emulators • (optimized Dummynet & Netem) • Example Scenario • Y-shape Topology • 1 virtual router • (3X10Gbps NICs) • 3 X 10Gbps virtual links • (30ms delay) • 2 competing flows • Softwares • OS: Ubunto 64bit & FreeBSD 64bit • Measurement S/W : Nuttcp & iPerf • TCP variants: TCP Reno, HSTCP, Cubic , HTCP, etc. • Research Impact of CRON • Next generation networking and computing research • Distributed computing for large scale computational sciences(Physics, fluid dynamics, bioinformatics, etc.), Remote visualization

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