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In this paper, the authors showed that swarming protocols for bulk data transfers perform much better when operating over optimized overlay topologies that take into consideration the end-to-end performance characteristics of the underlying network. Such topologies improve the aggregate transmission capacity of nodes, but where they make a huge difference compared to existing heuristic approaches, is on relieving bottleneck points. Random and myopic heuristics used in practice lack the required sophistication for overcoming such bottlenecks. Their optimized topologies are oblivious to the details of the swarming protocol that runs on top.
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