jiro@com (Jiro Nakamura) (02/24/91)
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
jacob@gore.com (Jacob Gore) (02/24/91)
/ comp.sys.next / jiro@com (Jiro Nakamura) / Feb 23, 1991 / > 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. Don't use software flow control with UUCP, unless your data is only plain ASCII (all uuencoded, for example). UUCP protocols have their own way of dealing with buffer overruns, they do not need flow control at all. If the only flow control option available to you is software (XON/XOFF or ACK/NAK, for that matter), TURN IT OFF for UUCP transmissions! Jacob -- Jacob Gore Jacob@Gore.Com boulder!gore!jacob