Path: utzoo!mnetor!uunet!husc6!mit-eddie!uw-beaver!cornell!rochester!bbn!uwmcsd1!ig!agate!ucbvax!A.ISI.EDU!LYNCH
From: LYNCH@A.ISI.EDU (Dan Lynch)
Newsgroups: comp.protocols.tcp-ip
Subject: Re:  PSN 7 End-to-End question.
Message-ID: <12371804390.20.LYNCH@A.ISI.EDU>
Date: 3 Feb 88 16:31:16 GMT
References: <8802022153.aa29738@Huey.UDEL.EDU>
Sender: daemon@ucbvax.BERKELEY.EDU
Organization: The Internet
Lines: 16


Phil and Dave,  Just to add to the history of how much data we used to
be able to shove through the old Arpanet:  In the late 70s I used to
FTP (in TCP mode) the huge LISP executable file that was a few megabytes
in size.  I did it from SRI to/from BBN.  Regularly got 40-45 kilobits
out of the throretical limit of 56.  That was on assumed lightly loaded
lines because I did it late at night.  In the daytime I would get
anywahere from 10-30 kilobits per second.  (As Dave pointed out,  it was all
1822 interfaces.)

Lenny Kleinrock told me a magic number in 1966 -- it was 37%.  Anytime
you try to get more than 37% of the capacity out of any shared services
you will start to get unhappy.  When you go over 70% you will be miserable.

Dan
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