Investigation Plan Analyze communication topology requirements of existing DOE applications –Collaboration with Jeff Vetter (ORNL) to capture communication requirements Use captured communication requirements to define proper balance between L1 and L2 switch layers Use cost model for existing L1 and L2 switch components to predict cost benefits for hybrid infrastructure Develop communication performance models for specific codes to predict benefits for lower-latency interconnects –Collaboration with UIC/StarLight facility to test using their Glimmerglass optical crossbar switches.
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