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Physical Sciences and Mathematics Commons™
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Full-Text Articles in Physical Sciences and Mathematics
Practical Prefetching Techniques For Parallel File Systems, David Kotz, Carla Schlatter Ellis
Practical Prefetching Techniques For Parallel File Systems, David Kotz, Carla Schlatter Ellis
Dartmouth Scholarship
Parallel disk subsystems have been proposed as one way to close the gap between processor and disk speeds. In a previous paper we showed that prefetching and caching have the potential to deliver the performance benefits of parallel file systems to parallel applications. In this paper we describe experiments with practical prefetching policies, and show that prefetching can be implemented efficiently even for the more complex parallel file access patterns. We test these policies across a range of architectural parameters.
Caching And Writeback Policies In Parallel File Systems, David Kotz, Carla Schlatter Ellis
Caching And Writeback Policies In Parallel File Systems, David Kotz, Carla Schlatter Ellis
Dartmouth Scholarship
Improvements in the processing speed of multiprocessors are outpacing improvements in the speed of disk hardware. Parallel disk I/O subsystems have been proposed as one way to close the gap between processor and disk speeds. Such parallel disk systems require parallel file system software to avoid performance-limiting bottlenecks. We discuss cache management techniques that can be used in a parallel file system implementation. We examine several writeback policies, and give results of experiments that test their performance.
Prefetching And Caching Techniques In File Systems For Mimd Multiprocessors, David F. Kotz
Prefetching And Caching Techniques In File Systems For Mimd Multiprocessors, David F. Kotz
Dartmouth Scholarship
The increasing speed of the most powerful computers, especially multiprocessors, makes it difficult to provide sufficient I/O bandwidth to keep them running at full speed for the largest problems. Trends show that the difference in the speed of disk hardware and the speed of processors is increasing, with I/O severely limiting the performance of otherwise fast machines. This widening access-time gap is known as the “I/O bottleneck crisis.” One solution to the crisis, suggested by many researchers, is to use many disks in parallel to increase the overall bandwidth. \par This dissertation studies some of the file system issues needed …