SUMMARY: nfsv3 mount not functioning

From: Cohen, Andy (Andy.Cohen_at_cognex.com)
Date: 11/25/03

  • Next message: Chris.Bryant_at_DTAG.Com: "SUMMARY: Publickey authentication with ssh" 
    Date: Tue, 25 Nov 2003 14:56:21 -0500
To: "Tru64-Unix-Managers (E-mail)" <tru64-unix-managers@ornl.gov>

    No replies to this from the list but I found a solution.

    The culprit seems to have been the MTU size of 9000 -- as soon as I set it back to 1500 the problem cleared up. Ironically, and mysteriously, there are 2 other NFS mounts to similar machines mounted on this DS20 that had no problems with this setting. These are the settings in fstab:

    This one didn't like the larger setting: nfsv3 rw 0 0
    This one was fine with the larger setting: nfsv3 rw,tcp,intr 0 0
    This one was fine with the larger setting: nfsv3 rw,intr 0 0

    So whether it was the way they were mounted or something about the remote server's configuration to make them behave differently I haven't been able to determine yet ... and probably won't get to.

    Thanks,
    Andy

    ORIGINAL QUESTIONS
    ==================

    Sorry, I failed to mention that I also just installed a DEGPA gigabit card on the DS20. I also made the following changes per tuning guides, tech support, and advice from this list:

    fifo-do-adaptive=0
    new_wire_method=0

    (to increase default system socket buffer sizes)
    tcp_sendspace=524288
    tcp_recvspace=524288

    (to increase MTU size to use jumbo frames)
    ifconfig alt0 imptu 9000

    Are any of these incompatible with nfsv3?

    Thanks again.

    Andy

    ORIGINAL QUESTION
    =================

    Help!

    We've got a DS20E running 5.1A that we just applied the latest patch kit (PK6) to. There's an nfsv3 mount (to a solaris box) that doesn't seem to be functioning. I can navigate to the directory that serves as the mount point and issue 'ls' ok. However, if I go to a sub-directory any command I issue just hangs indefinitely and I can't even kill it. Has anybody experienced this type of behavior? Anybody have any suggestions for fixes? I can't unmount because the hung command was issued while in the mounted file system.

    Thank you!
    Andy

  • Next message: Chris.Bryant_at_DTAG.Com: "SUMMARY: Publickey authentication with ssh"

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