Abstract
In this paper, we focus on the problem of predicting CPU availability for Computational Grid settings in which individual machines may be either time-shared or batch-controlled. We use the Network Weather Service — a distributed system that monitors and forecasts resource performance in Computational Grid environments — to measure and predict CPU availability. We examine the accurancy with which CPU availability can be predicted in an interactive cluster computing environment under production load conditions, and compare these results with a similar study of a production batch system. Our work shows that in the environments we have studied, the availability of clusted interactive resources is significantly more predictable that of the batch system.
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