Technical Report CS0968

TR#:CS0968
Class:CS
Title: A Unified Approach to Approximating Resource Allocation and Scheduling
Authors: Amotz Bar-Noy, Reuven Bar-Yehuda, Ari Freund, Joseph (Seffi) Naor, and Baruch Schieber
PDFCS0968.pdf
Abstract: This paper addresses a general framework for resource allocation and scheduling problems. Given a resource of fixed size, we present algorithms that approximate the maximum throughput or the minimum loss by a constant factor. Our approximation factors apply to many prominent problems among others: (i) Real-time scheduling of jobs on parallel machines. (ii) Bandwidth allocation for sessions between two endpoints. (iii) General caching. (iv) Dynamic storage allocation. (v) Bandwidth allocation on optical line and ring topologies. For many of the problems, this is the first constant factor approximation algorithm. Our algorithms are extremely simple and efficient. They use the local-ratio technique but they can also be equivalently interpreted within the primal-dual schema.
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