Document Type

Technical Report

Publication Date

9-14-1994

Technical Report Number

PCS-TR94-230

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 an extension which supports strided and nested-strided I/O requests.

Comments

A result of the CHARISMA project. This report has been superceded by report PCS-TR95-253

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