Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!uunet!shaman!jiro
From: jiro@com (Jiro Nakamura)
Newsgroups: comp.sys.next
Subject: UUCP, Flow Control, 040 Machines, and Trailblazers
Summary: Flow control makes things faster
Message-ID: <1991Feb23.181700.2753@shaman.com>
Date: 23 Feb 91 18:17:00 GMT
Sender: jiro@shaman.com (Jiro Nakamura)
Organization: Shaman Consulting
Lines: 32

Folks -
  I don't know if anyone would be interested in this trivia, but:
  I've been running a UUCP line to UUNET with a Traiblazer for over two
months now. I started with an 030 Cube and have recently upgraded to an
040. I was interested in seeing what a difference using hardware flow
control vs. XON/XOFF flow control would make in my transmissions.

  Well, here it is. Previously, with my 030 I had been achieving bps
rates of about 700-800 bytes per second (7000 to 8000 bits per second) as
reported by /etc/uucp/uucp.day.sh.
  
  When I switched to the 040, I have been getting bps rates of about
900-1000 bytes per second. Approximately an increase of 100 bytes per second,
or 10% increase.

  This is using a T2500 with PEP and UUCP spoofing, but no compression since
most of my traffic is precompressed NeXTMail and USENET (CNews with
compression).
 
  Also, I think I am getting less dropped connections and lost packets due
to UUCICO getting confused because of overrunned buffers or spurious XON/XOFF
characters in the byte stream. 

	- jiro nakamura

ps. I modified the old modem cable myself. Pretty trivial if you use the
zs man page.

-- 
Jiro Nakamura				jiro@shaman.com
Shaman Consulting			(607) 253-0687 VOICE
"Bring your dead, dying shamans here!"	(607) 253-7809 FAX/Modem


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