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000116_news@newsmaster….columbia.edu _Fri Jan 23 15:11:16 1998.msg
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From: fdc@watsun.cc.columbia.edu (Frank da Cruz)
Newsgroups: comp.protocols.kermit.misc
Subject: Re: need file transfer info
Date: 23 Jan 1998 20:11:12 GMT
Organization: Columbia University
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In article <6aao76$97n$1@mozart.jlc.net>,
Glenn Sherman <gsherman@remove_this.jlc.net> wrote:
: I am trying to speed up a kermit file transfer between a Qnx comp. and
: win95. When using K95 to telnet (TCP/IP) into my Qnx computer, I want
: to send a file back to the win95 computer.
: I log into the Qnx computer and issue
:
: kermit -i -s filename
:
: A 666624 byte file takes 1 min 52 secs to transfer ( 5952 CPS )
:
: If I use ftp to send the same file, it takes 1.4 sec ( 455 kb/sec )
: I tried 'set tcp recvbuf 25000' & 'set tcp sendbuf 25000' but no
: changes.
:
C-Kermit 6.0 on QNX is documented in the "Using C-Kermit" book that came
with your copy of Kermit 95. See the chapter on performance for details.
Also see our FAQ:
http://www.columbia.edu/kermit/faq.html
ftp://kermit.columbia.edu/kermit/faq.txt
If you want to see a dramatic difference without doing any reading first,
try this:
kermit -i -Q -s filename
(add the "-Q" (uppercase) command-line option; mnemonic Quick -- equivalent
to the FAST command). This increases the Kermit packet length and window
size. You should not need to mess with the TCP parameters except under
exceptional circumstances.
- Frank