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  • Slow NFS Writes on MacOSX NFS client

    From davidecolbert@davidecolbert@yahoo.com (tubbyman) to comp.sys.macintosh,comp.client-server,comp.protocols.nfs,comp.sys.mac.system on Friday, July 25, 2003 09:07:50
    From Newsgroup: comp.sys.mac.system

    Hello,

    I have been having some terrible problems with all of my mac nfs
    clients.
    All of them nfs mount from various un*x machines, mainly from an sgi
    server. AFP, SMB, FTP, scp, http all have acceptable performance on
    the clients. NFS reads on the clients have acceptable performance.

    NFS writes on the mac clients are horrendously slow (less than 5% of
    what I should be getting).

    I have tried everything that I can think of. Obviously, it's not
    hardware if other services are getting good speeds. None of my other
    non-mac clients are affected. I have tested a single mac nfs serving
    to another mac on a little switch, and nfs writes are still slow, so
    it's not my server or the network infrastructure between the server
    and client. I've tried all duplex settings. I have tried every
    possible configuration of nfs for the mounts that I can think of, but
    nothing improves write performance. rsize and wsize are 8k, tried tcp
    and udp, nfs v2 and nfs v3, but nothing works.

    I've used ethereal to look at packets. When I used TCP, I got "invalid
    TCP checksum" errors and when I used UDP, the "Stable" flag in the
    packets was UNSTABLE. I don't know what to do with this information,
    though.

    Have others encounterd this? I have exhausted all resources at my
    disposal. Anyone have any ideas on how to fix? All of our users' home directories are NFS mounted to clients. Until NFS works, the macs
    cannot be integrated into our network as clients. SMB and AFP are not
    options due to their limitations.

    Although you can mount NFS volumes through either the Finder or
    NetInfo Manager, Apple does not support NFS in MacOSX, and has offered
    no solution.

    Does anyone out there have any ideas or found a work around, or do I
    just have to wait for a better nfs implementation from Apple?

    Thanks in advance,
    David Colbert
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