Abstract
In this paper, we present a new approach concentrating on buffering schemes along with scheduling policies for distribution of compute – intensive jobs with unknown service times in a cluster of heterogeneous servers. We utilize two types of ADM Operton processors of which parameters are measured according to SPEC’s Benchmark and Green500 list. We investigate three cluster models according to buffering schemes (server-level queue, class-level queue, and cluster-level queue). The simulation results show that the buffering schemes significantly influence the performance capacity of clusters, regarding the waiting time and response time experienced by incoming jobs while they retain energy efficiency of system.
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