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From: keogh@nixeid.UUCP (Paul Keogh)
Newsgroups: comp.protocols.tcp-ip,comp.dcom.lans
Subject: IP down scaling (linear or what) ?
Keywords: ip scaling performance
Message-ID: <58@nixeid.UUCP>
Date: 6 Dec 90 14:28:00 GMT
Organization: Nixdorf Computer Software,Dublin Ireland
Lines: 27

I am trying to determine, quantitively or qualititively, the effect of 
reducing the bandwidth of an IP link.

Lets assume I'm running FTP over Ethernet, with resulting throughput varying
between 50Kbytes and 100Kbytes, averaging out at say 80Kbytes. I then want to
replace the 10Mbits media with 2Mbits and then with 64Kbits (using bridges).

Obivously at 10Mbits, the average speed of an FTP transfer is not influenced
by the physical media but what happens at speeds of 2Mbits and 64Kbits ?

I am trying to establish the relationship:

	Speed(FTP) = G(Speed(physical media)) + F(other factors)

where F(other factors) is assumed the same for all instances of the test.

Does anyone have any ideas for the nature of G() as described above ?

Thanx,
Paul Keogh
keogh@u.nix.ie
-- 
Paul Keogh, 				  *
Nixdorf Computer Research & Development,  *	Ha! you think it's funny,
Dublin, Ireland.			  *	Turning rebellion into money
					  *
Net: keogh@u.nix.ie		          *