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1 引言利用一组工作站并行工作解决粗粒度的较大型计算问题.即NOW系统一直是计算机界一个重要的研究领域。随着Internet的迅猛发展。网上已有数千万的各类计算机,但实际的网络资源利用率是很低的。据有关统计,系统平均使用率仅为30％左右。有的空闲率
1 INTRODUCTION The use of a set of workstations to work in parallel to solve the larger computational problems of coarse-grained, ie, the NOW system has long been an important area of research in the computing world. With the rapid development of the Internet. There are tens of millions of computers on the Internet, but the actual utilization of network resources is very low. According to relevant statistics, the average utilization rate of the system is only about 30%. Some free rate