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Automated Tuning of Disk Layouts The mechanical positioning delays of disk accesses continue to plague
system performance. To address this, many heuristics have been developed
for adapting on-disk data layouts to expected and observed workload
characteristics. We are developing a two-tiered software architecture
for cleanly and extensibly combining such heuristics. In this architecture,
each heuristic is implemented independently and an adaptive combiner
merges their suggestions based on how well they work in the given environment.
The result is a simpler and more robust system for automated tuning
of
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