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From: SRFERGU@ERENJ.BITNET (Scott Ferguson)
Newsgroups: comp.sys.apollo
Subject: Ethernet Throughput
Message-ID: <9004101257.AA03252@umix.cc.umich.edu>
Date: 10 Apr 90 12:45:26 GMT
Sender: daemon@ucbvax.BERKELEY.EDU
Organization: The Internet
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I've got two machines on their own solo Ethernet link. Using ftp, my
realized data rates vary from 30-100 kbytes/sec, most of the time I see
about 50 K/sec. Now, if 10 Mbits/sec ideally equals 1.25 Mbytes/sec (not
counting for packet headers, error checking, etc), I'm seeing things
very far from the peak throughput.

Now, people are saying that on a 2-node link I should get no collisions,
and see up to 50% of ideal, which would be 500 Kbytes/sec, right?
I'M GETTING A TENTH OF THAT! WHY?

The two machines are a DN4000 which is not burdened by multiple users or
processes, and an Ardent Titan also dedicated to this process. I guess I
need to consider disk write times as well for file transfers, but

shouldn't I be doing a little better than 50 Kbytes/sec?

I'm using thin wire ethernet (cheapernet), am I losing speed because of that?

Thanks, Scott Ferguson
srfergu@erenj.bitnet