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    SubjectRe: NFS fails after 40 minutes of use
    "Richard B. Johnson" wrote:
    >
    > In the following I show that about 40 minutes into an across-the
    > network-backup, the remote mount-point becomes inaccessible.
    > Both machines are running Linux 2.2.1 The server is running a
    > Red Hat 5.2 release. The client is running software accumulated
    > over several years (not a vendor release).
    >
    > Neither the client, nor the server appear to run out of memory.
    > There are no entries in the logs of either machines to show the
    > problem.
    >
    > This is 100% repeatable.

    I have previously reported a similar problem,
    reproduceable with a single machine:

    mount localhost:/ /x
    dd if=/dev/zero of=/junk bs=1024k count=200
    diff junk /x/junk

    This often (not always) fails with *differences* on the "diff".
    Happens with userland NFS only; not (yet) with knfsd.

    The system is a P2-450Mhz with 128MB and *very fast*
    raid0 (18-20MByte/sec) disk I/O.
    --
    mlord@pobox.com

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