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Full-Text Articles in Physical Sciences and Mathematics
Disk-Directed I/O For Mimd Multiprocessors, David Kotz
Disk-Directed I/O For Mimd Multiprocessors, David Kotz
Dartmouth Scholarship
Many scientific applications that run on today's multiprocessors are bottlenecked by their file I/O needs. Even if the multiprocessor is configured with sufficient I/O hardware, the file-system software often fails to provide the available bandwidth to the application. Although libraries and improved file-system interfaces can make a significant improvement, we believe that fundamental changes are needed in the file-server software. We propose a new technique, \em disk-directed I/O, that flips the usual relationship between server and client to allow the disks (actually, disk servers) to determine the flow of data for maximum performance. Our simulations show that tremendous performance gains …
Characterizing Parallel File-Access Patterns On A Large-Scale Multiprocessor, Apratim Purakayastha, Carla Schlatter Ellis, David Kotz, Nils Nieuwejaar, Michael Best
Characterizing Parallel File-Access Patterns On A Large-Scale Multiprocessor, Apratim Purakayastha, Carla Schlatter Ellis, David Kotz, Nils Nieuwejaar, Michael Best
Dartmouth Scholarship
Rapid increases in the computational speeds of multiprocessors have not been matched by corresponding performance enhancements in the I/O subsystem. To satisfy the large and growing I/O requirements of some parallel scientific applications, we need parallel file systems that can provide high-bandwidth and high-volume data transfer between the I/O subsystem and thousands of processors. \par Design of such high-performance parallel file systems depends on a thorough grasp of the expected workload. So far there have been no comprehensive usage studies of multiprocessor file systems. Our CHARISMA project intends to fill this void. The first results from our study involve an …
Disk-Directed I/O For Mimd Multiprocessors, David Kotz
Disk-Directed I/O For Mimd Multiprocessors, David Kotz
Dartmouth Scholarship
Many scientific applications that run on today's multiprocessors are bottlenecked by their file I/O needs. Even if the multiprocessor is configured with sufficient I/O hardware, the file-system software often fails to provide the available bandwidth to the application. Although libraries and improved file-system interfaces can make a significant improvement, we believe that fundamental changes are needed in the file-server software. We propose a new technique, \em disk-directed I/O, that flips the usual relationship between server and client to allow the disks (actually, disk servers) to determine the flow of data for maximum performance. Our simulations show that tremendous performance gains …