Accession Number:

ADA265417

Title:

A Status Report on Research in Transparent Informed Prefetching

Descriptive Note:

Corporate Author:

CARNEGIE-MELLON UNIV PITTSBURGH PA SCHOOL OF COMPUTER SCIENCE

Personal Author(s):

Report Date:

1993-02-01

Pagination or Media Count:

16.0

Abstract:

This paper focuses on extending the power of caching and prefetching to reduce file read latencies by exploiting application level hints about future IO accesses. We argue that systems that disclose high-level knowledge can transfer optimization information across module boundaries in a manner consistent with sound software engineering principles. Such Transparent Informed Prefetching TIP systems provide a technique for converting the high throughput of new technologies such as disk arrays and log-structured file systems into low latency for applications. Our preliminary experiments show that even without a high-throughput IO subsystem TIP yields reduced execution time of up to 30 for applications obtaining data from a remote file server and up to 13 for applications obtaining data from a single local disk. These experiments indicate that greater performance benefits will be available when TIP is integrated with low level resource management policies and highly parallel IO subsystems such as disk arrays

Subject Categories:

  • Computer Programming and Software

Distribution Statement:

APPROVED FOR PUBLIC RELEASE