NFSv3 Vs NFSv2 revisited ?

From: Balaji Chandrasekar (balaji_at_temple.edu)
Date: 08/25/03

  • Next message: John Galt: "memory fault using passwd in T64 5.1A" 
    Date: Mon, 25 Aug 2003 06:09:09 +0000 (GMT)
To: tru64-unix-managers@ornl.gov

    hello managers

    We have a problem pertaining to the NFSv3 performance against
    NFSv2, I have seen a lot of other posts discussing the same
    topic , but have not got any satisfatory answers.

    Here is my problem.

    We have a standalone Alphaserver DS20 running Tru64 v5.1B and
    Patch kit 1 which acts as a NFS server.

    We also have 5 ES40's running v4.0F patch kit 7 running as
    NFS clients.

    Periodically I see the following NFS errors on all of my NFS
    clients

    Jul 15 07:47:18 nfsclient vmunix: NFS3 server nfsserver_name
    not responding still trying
    Jul 15 07:47:23 nfsclient vmunix: NFS3 server nfsserver_name
    ok

    I did a small experiment whereby I copied a 100MB file
    concurrently on all the five NFS clients and I immediately
    get the above error.At this time all my clients were running
    NFSv3.

    As a second experiment , I changed my clients to NFSv2 and
    ran the same copy , and surprise I do NOT see any errors,
    Also the the time it takes to copy all the files is one half
    of what it takes with NFSv3.

    I have checked the read/write sizes,timeo and retrans values
    on both NFSv2 and NFSv3 and they are the same.

    I should also mention that I have Tru64 UNIX v4.0F NFS
    servers and the clients pointing to that server DO NOT get
    the errors.

    The above leads me to believe its more of a implementation
    NFS on V5.1B problem.

    Has anybody else seen this or know of any solution/fixes?

    Thanx
    Balaji./
    Balaji Chandrasekar

    http://www.balajichandrasekar.com

  • Next message: John Galt: "memory fault using passwd in T64 5.1A"

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