Sharing of computational resources across multiple administrative domains (sometimes called grid computing) is rapidly gaining in popularity and adoption. Resource sharing middleware must deal with ownership issues, heterogeneity, and multiple types of resources that include compute cycles, data, and services. Design principles and software approaches for monitoring and management tools in such environments are the focus of this paper. A basic set of requirements for resource administration tools is first proposed. A specific tool, the GUI for the H2O metacomputing substrate is then described. Initial experiences are reported, and ongoing as well as future enhancements to the tool are discussed.
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