@InCollection{nieuwejaar:strided2-book, author = {Nils Nieuwejaar and David Kotz}, title = {Low-level Interfaces for High-level Parallel {I/O}}, booktitle = {Input/Output in Parallel and Distributed Computer Systems}, chapter = {9}, editor = {Ravi Jain and John Werth and James C. Browne}, year = {1996}, series = {The Kluwer International Series in Engineering and Computer Science}, volume = {362}, pages = {205--223}, publisher = {Kluwer Academic Publishers}, copyright = {Kluwer Academic Publishers}, earlier = {nieuwejaar:strided2}, keywords = {parallel I/O, multiprocessor file system, pario-bib, dfk}, abstract = {As the I/O needs of parallel scientific applications increase, file systems for multiprocessors are being designed to provide applications with parallel access to multiple disks. Many parallel file systems present applications with a conventional Unix-like interface that allows the application to access multiple disks transparently. By tracing all the activity of a parallel file system in a production, scientific computing environment, we show that many applications exhibit highly regular, but non-consecutive I/O access patterns. Since the conventional interface does not provide an efficient method of describing these patterns, we present three extensions to the interface that support {\em strided}, {\em nested-strided}, and {\em nested-batched} I/O requests. We show how these extensions can be used to express common access patterns.}, comment = {Part of a whole book on parallel I/O; see iopads-book and nieuwejaar:strided2 (which is not much different).} }