Like all computing platforms, grids are in need of a suite of benchmarks by which they can be evaluated and characterized. As a first step towards this goal, we have developed a set of probes that exercise basic grid operations by simulating simple grid applications. We run these probes on a testbed, collecting performance data such as compute times, network transfer times, and Globus middleware overhead. The results of our experiments help provide insight into the stability, robustness, and performance of this grid testbed, as well as some recommendations for future grid development.
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