Sun-4 severe NFS problem
Dan Franklin
dan at bbn.com
Wed Apr 26 01:13:04 AEST 1989
Thanks to everyone who responded. After I sent the original message (but
before it appeared in Sun-Spots) someone here at BBN on our local Sun
mailing list suggested adjusting the buffer sizes (thanks Matt!), and that
did the trick. Surprisingly, lowering wsize to 1024 wasn't enough; but
512 was. So we now have the world's slowest Sun-4/110 (for I/O), but at
least it's usable. Only wsize, not rsize, needed to be adjusted. The
Sun-4 never had any problem receiving data. I don't consider this to be
the conclusion of this episode--I would still like some way to achieve
reasonable NFS speeds--but it helps.
I have noticed one other anomaly: when doing a cp -r on the Sun-4 copying
files onto our Microvax, it often gets a "Permission denied" error in the
middle of copying a series of files to the same directory. It never
chooses the same file, and it always succeeds when I run it again. The
file in question does get created, but is only zero-length. All the files
are mode 444, so I could understand if it never worked at all (since NFS
is stateless), but to have it fail occasionally puzzles me. But this is
only a minor annoyance right now.
Dan Franklin
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