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As file systems reach the petabytes scale, users and administrators are increasingly interested in acquiring high-level analytical information for file management and analysis. Two particularly important tasks are the processing of aggregate and top-k queries which, unfortunately , cannot be quickly answered by hierarchical file systems such as ext3 and(More)
Power, energy, and compute time are all important metrics that can act as either objectives or constraints in program or system optimization. Recent microprocessors include sensors (counters) for monitoring these metrics as well as on-chip system controllers that may use this information. Code optimization is relatively straightforward if the measurements(More)
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