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Grid resource management has been a highly studied research field since Grids were born. Though well-designed, evaluated and widely used resource brokers and meta-schedulers have been developed, new capabilities are still required, while the most wanting is interoperability support. Most of the existing brokering solutions can hardly cross the borders of current middleware systems that are lacking the support of these requirements. In this paper, the authors investigate the current resource management solutions from the lowest to the highest level of the Grid middleware, and examine and compare their connections by presenting an anatomy that helps users to grasp the basics of their operation and the researchers to identify common components and open issues.
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