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Re: NT <-> Unix slow

From: Kent Vander Velden <graphix@iastate.edu>
Date: Wed, 18 Feb 1998 12:49:47 -0600
Message-ID: <34EB2D4B.C34B7513@iastate.edu>
To: Henrik Frystyk Nielsen <frystyk@w3.org>
CC: Kent Vander Velden <graphix@toybox.cc.iastate.edu>, www-lib@w3.org
Henrik Frystyk Nielsen wrote:
> 
> At 22:04 02/17/98 -0600, Kent Vander Velden wrote:
> >
> >  I have noticed that when running Apache on NT transferring files to
> >another NT machine is somewhere around 20x faster than transferring
> >to a Unix machine using libwww.  Transferring between two Unix machines
> >is a reasonable rate but NT to Unix is really bad.  All machines are
> >on the same wire.  Is there something with libwww that it does not like
> >to talk with NT servers?
> 
> Hmm, that's interesting - the difference in performance may be in the TCP
> stacks as well as in libwww itself. What Unix are you running?

  NT 4.0 Server and SGI Irix 5.3 and 6.2 and HPUX 9.07 are the ones that
I 
have tried so far.  Since I also see this problem with Netscape it
must be something with the stack.  NT <-> Unix trasfers seem to max out
around 100k/s and generally are ~40k/s.  Unix <-> Unix and NT <-> NT
transfer generally are at >500k/s and often ~900k/s.

> Also, do you have some TCP dumps of what is going on? As they are all on
> the same wire, it should be easy to use tcpdump to capture the transfers.
> Make sure that you are running the latest version of tcpdump - you can find
> it linked from

  I will get a few dumps of the network when I get to work and make
them available via ftp this evening.

  Thanks!
Received on Wednesday, 18 February 1998 13:49:54 GMT

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