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Dynamic File Prefetching Scheme Based on File Access Patterns in VIA-Based Parallel File System

Yoon-Young LEE, Chei-Yol KIM, Dae-Wha SEO

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Summary :

A parallel file system is normally used to support excessive file requests from parallel applications in a cluster system, whereas prefetching is useful for improving the file system performance. This paper proposes dynamic file prefetching scheme based on file access patterns, named table-comparison prefetching policy, that is particularly suitable for parallel scientific applications and multimedia web services in a VIA-based parallel file system. VIA relieves the communication overhead of traditional communication protocols, such as TCP/IP. The proposed policy introduces a table-comparison method to predict data for prefetching. In addition, it includes an algorithm to determine whether and when prefetching is performed using the current available I/O bandwidth. Experimental results confirmed that the use of the proposed prefetching policy in a VIA-based parallel file system produced a higher file system performance for various file access patterns.

Publication
IEICE TRANSACTIONS on Information Vol.E85-D No.4 pp.714-721
Publication Date
2002/04/01
Publicized
Online ISSN
DOI
Type of Manuscript
PAPER
Category
Computer Systems

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