A Two-Tier Framework for Transmission-Cost Minimization of High-Performance Communication Applications

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In two-tier High-Performance Networks (HPNs), some facilities are constructed to form a powerful supercomputing environment, and to alleviate server load. Then, the applications are provided by them in co-operated, parallel and distributed manners. A proper way to select facilities is crucial to the performance of two-tier HPNs The problem of selecting facilities can be regarded as a kind of the facility location problem, which is to determine an optimal subset of facilities that will be open to serve users. The traditional facility location problem aims to minimize the incurred costs between the users/servers and their assigned facilities. In two-tier HPNs, the incurred costs can be regarded as the transmission costs, e.g. transmission latency, bandwidth overhead.