Improving File Fetches in AFS

Abstract

We describe two enhancements to the AFS distributed file system intended to improve the performance of large file fetches over high-speed networks. Selective caching AFS bypasses the client local disk when fetching files, which improves the performance of applications such as streaming video, for which local caching is of little benefit, and gives client processor and cache resources to applications for which local caching is an advantage. Split-path AFS augments the conventional UDP-based connection between AFS client and server with a "fast path" over native ATM AAL5 for file data fetches. These enhancements combine to reduce the elapsed time of large (100 MB) file fetches by 80% in our laboratory environment.

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Document Details

Document Type
Technical Report
Publication Date
Feb 12, 2001
Accession Number
ADA386836

Entities

People

  • Charles J. Antonelli
  • Jim Rees
  • Kevin Coffman

Organizations

  • University of Michigan

Tags

Communities of Interest

  • Cyber
  • Materials and Manufacturing Processes

DTIC Thesaurus Topics

  • Abstracts
  • Buildings And Structures
  • Computer Programs
  • Environment
  • Information Systems
  • Mass Storage
  • Measurement
  • Michigan
  • Military Research
  • Network Protocols
  • Networks
  • Operating Systems
  • Platforms
  • Research Facilities
  • Security
  • Servers (Computer Hardware)
  • Steady State

Fields of Study

  • Computer science

Readers

  • Computer Networking
  • Computer Science/Computer Engineering/Data Science/Digital Signal Processing.
  • Environmental Impact Assessment (EIA) of Proposed Air Force Base Actions.