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Desktop grids use the free resources in Intranet and Internet environments for large-scale computation and storage. While desktop grids offer a high return on investment, one critical issue is the validation of results returned by participating hosts. Several mechanisms for result validation have been previously proposed. However, the characterization of errors is poorly understood. To study error rates, the authors implemented and deployed a desktop grid application across several thousand hosts distributed over the Internet. They, then analyzed the results to give quantitative and empirical characterization of errors stemming from Input or Output (I/O) failures.
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