🚀 go-pugleaf

geoff@zswamp.UUCP (Geoffrey Welsh) writes:

> linear@linear.mv.com (Robert Henney) writes:
> 
> > One thing I wouldn't mind knowing is why on other systems when I connect
> > at 14.4k/V.42BIS/LAP-M, file transfers of precompressed (ie.ZIP) go at
> > around 1700cps, yet the same connection (14.4k/V.42BIS/LAP-M) using
> > UUCICO.EXE results in an average of 600cps.  Error correction is not
> > having any (or very little) effect on tranfers under a normal terminal
> > program.  Why should they be so greatly affected under UUCICO.EXE.
> 
>    Because uucico doesn't use the same protocol that your terminal program 
> does (at least, I'm betting that you're not using UUCP-g as your transfer 
> protocol).  ZMODEM is a streaming protocol, so it has almost no vulnerability
> to high latency lines and it scales well with connect speed.  UUCP-g in a 
> windowed protocol, so it is vulnerable and has limited scaling to connect 
> speed; many implementations understand only the 64 byte packet size and the 3
> packet window, making it a really bad choice for high latency connections and
> increasingly inefficient with faster connects.

Ok... well, heres an update of my situation:  I've switched to FX_UUCICO03B
and at 14.4k/v.42BIS/LAP-M with protocol 'g' at 64 byte blocks (yes, 64), I
am now getting an average of 1550 to 1650 cps... hmmm... explain this!  :)

Quick note... I get my 'average cps' values from the cps UUCICO prints
out on files over 50k, as smaller files tend to be way off on cps values.
And YES, I only count PRECOMPRESSED files... so don't bug me there.

I wish my host would support 1024 packet size.  That might get it to the
1700-1800cps that my term with 'z' usually got.  I think I'll also check
if my host supports any streaming protocols.

> ---  
>   Geoffrey Welsh, 7 Strath Humber Court, Islington, Ontario, M9A 4C8 Canada
> geoff@zswamp.uucp, [xenitec.on.ca|m2xenix.psg.com]!zswamp!geoff (416)258-8467
>             Mathematics is the Mechano set with which we build our
>        understanding of the Universe.  Unfortunately, I preferred Lego.

--
|  Robert Henney  (NHTI)  Concord, NH   EMAIL:linear@linear.mv.com  |