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000121_news@newsmaster….columbia.edu _Mon Jan 26 10:57:20 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: 26 Jan 1998 15:57:18 GMT
Organization: Columbia University
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In article <6ab7rq$dps$1@mozart.jlc.net>,
Glenn Sherman <gsherman@remove_this.jlc.net> wrote:
: >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
:
: What kind of speed (cps) should I expect to get with kermit over TCP/IP ?
:
That would depend on the underlying communications medium: Dialup, 10Mbps
Ethernet, 100Mbps Ethernet, etc. On the faster mediums, the computer tends
to become the bottleneck. It also depends on whether you are making a
connection from one node on your local net to another on the same net, or if
you are going out over the Internet, and to what extent the net (and each
segment of it, and each router, etc) are congested.
: I am assuming you were talking about chapter 12 in the manual.
:
Right, Chapter 12 of "Using C-Kermit", 2nd Edition (1997), or Chapter 8 of
the first edition.
: using the -Q option boosted the transfer to 28000 cps.
:
That would be pretty good for a V.34 PPP connection, not very good for a
direct Ethernet connection. For long-haul TCP/IP connections, rates can
vary just as much as FTP; in this case the net itself tends to be the
bottleneck.
- Frank