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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 strided, nested-strided, and nested-batched I/O
requests. We show how these extensions can be used to express common
This TR supercedes PCS-TR94-230.
A result of the CHARISMA project.
Appeared in IOPADS '95 at IPPS '95.
Bibliographic citation for this report: [plain text] [BIB] [BibTeX] [Refer]
Or copy and paste:
Nils Nieuwejaar and David Kotz, "Low-level Interfaces for High-level Parallel I/O." Dartmouth Computer Science Technical Report PCS-TR95-253, March 1995.
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