home
***
CD-ROM
|
disk
|
FTP
|
other
***
search
/
kermit.columbia.edu
/
kermit.columbia.edu.tar
/
kermit.columbia.edu
/
newsgroups
/
misc.20000114-20000217
/
000008_news@columbia.edu _Sat Jan 15 17:25:32 2000.msg
< prev
next >
Wrap
Internet Message Format
|
2000-02-16
|
2KB
Return-Path: <news@columbia.edu>
Received: from newsmaster.cc.columbia.edu (newsmaster.cc.columbia.edu [128.59.59.30])
by watsun.cc.columbia.edu (8.8.5/8.8.5) with ESMTP id RAA07926
for <kermit.misc@watsun.cc.columbia.edu>; Sat, 15 Jan 2000 17:25:32 -0500 (EST)
Received: (from news@localhost)
by newsmaster.cc.columbia.edu (8.8.5/8.8.5) id RAA25738
for kermit.misc@watsun.cc.columbia.edu; Sat, 15 Jan 2000 17:23:48 -0500 (EST)
X-Authentication-Warning: newsmaster.cc.columbia.edu: news set sender to <news> using -f
From: fdc@watsun.cc.columbia.edu (Frank da Cruz)
Subject: Re: C-Kermit 7 very slow - what can be done?
Date: 15 Jan 2000 22:23:48 GMT
Organization: Columbia University
Message-ID: <85qs1k$p47$1@newsmaster.cc.columbia.edu>
To: kermit.misc@columbia.edu
In article <Ta6g4.319$M4.31002@den-news1.rmi.net>,
Arthur Wouk <awouk@syzygy.nilenet.com> wrote:
: they have just installed c-kermit 7.0 on nilenet, and i am seeing a
: marked drop in performance from the previous release. i cannot get ANY
: file transfer (nothing is downloaded) unless i use either the
: cautious or the robust option.
:
That's a fairly sure indicator of a transparency problem; version 7
sends many control characters "bare" now instead of prefixing. The
set of bare controls is safe in most environments but obviously not all.
To back off on control-character unprefixing, tell C-Kermit 7.0 to
"set prefixing all" or "set prefixing cautious". Or fine-tune with
"set control [un]prefix <list-of-specific-characters>".
: ... with cautious i get no more than a
: transfer rate of 2869cps (binary - 33.5k baud modem). i used to get
: over 3000cps on the same line with the same modem. with robust the
: performance drops to about 1870 cps.
:
CAUTIOUS and ROBUST are "macros" that adjust not only prefixing but also
packet length and window size. I think you only need to worry about the
prefixing.
: this is from a sun SPARC station 20 running Solaris 2.6 to a
: SPARC station2 running Solaris 2.4, in case that has any bearing on the
: matter. the SPARC2 is running c-kermit6.0.192.
:
None of this should matter -- what really matters is: what box or "thing"
along the communication path is sensitive to what control characters?
- Frank