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The Dragonfly topology provides low-diameter connectivity for high-performance computing with all-to-all global links at the inter-group level. Our traffic matrix characterization of various scientific applications shows consistent mismatch between the imbalanced group-to-group traffic and the uniform global bandwidth allocation of Dragonfly. Though adaptive routing has been proposed to utilize bandwidth...
We present a reconfigurable dragonfly architecture for High-Performance-Computing (HPC) systems leveraging optical-circuit-switching. An SDN control plane monitors network traffic characteristics and optimizes the connectivity. Software-controlled reconfiguration of the optically interconnected topology is experimentally demonstrated.
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