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Improving NFS performance over wireless links

  • Rohit Dube
  • , Cynthia D. Rais
  • , Satish K. Tripathi
    • University of Maryland, College Park

    Research output: Contribution to journalArticlepeer-review

    14 Scopus citations

    Abstract

    NFS is a widely used remote file access protocol that has been tuned to perform well on traditional LANs which exhibit low error rates. Users migrating to mobile hosts would like continued remote file access via NFS. However, low bandwidth and high error rates degrade performance on mobile hosts using wireless links, hindering the use of NFS. We conducted experiments to study the behavior of NFS in a wireless testbed. Based on these experiments, we incorporated modifications into the mobile NFS client. This paper presents two mechanisms which improve NFS performance over wireless links: an aggressive NFS client and link-level retransmissions. Our experiments show that these mechanisms improve response time by up to 62%, which brings the performance to within 5% of that obtained in zero error conditions.

    Original languageEnglish
    Pages (from-to)290-298
    Number of pages9
    JournalIEEE Transactions on Computers
    Volume46
    Issue number3
    DOIs
    StatePublished - 1997

    Keywords

    • File systems
    • Link-level retransmission
    • Mobile computing
    • NFS
    • Performance evaluation
    • Wireless LAN

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