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From: thad@cup.portal.com (Thad P Floryan)
Newsgroups: comp.sys.amiga
Subject: Re: UUCP Summary
Message-ID: <37243@cup.portal.com>
Date: 26 Dec 90 07:52:31 GMT
References: <1869097d.ARN0cac@cbmami.UUCP> <37219@cup.portal.com>
  <186abac2.ARN08a8@easy.hiam>
Organization: The Portal System (TM)
Lines: 50

lron@easy.hiam (Dwight Hubbard) in <186abac2.ARN08a8@easy.hiam> writes:

	[...]
	No, way more like 700cps.
	[...]
	I'm connecting with a USR HST in V.32 mode with V.42bis and am seeing
	about 650cps.

Though I already answered this, there are two more items one may wish to
consider:

1. I have a LOT of UUCP traffic in-out of my systems ("thadlabs") and I
periodically enable full debug mode (via shell script (this IS a UNIX box)) to
sample UUCP's song-and-dance.  I've often noted that many "far-end" V.32
modems do NOT have MNP 5 and seem to have only MNP 3 or MNP 4.  Point being:
though Dwight's modem is V.32/V.42bis, the "other" modems might not be, thus
the "slower" transfers he experiences.  One of my connections is to a major
back-bone in Palo Alto (4 miles away) and it only has MNP 4 on a Codex modem;
I get better through-put with sites on the East Coast and even outside the
country at MNP 5, 7 or 9.

2. The UUCP protocol used by AmigaUUCP is *NOT* the best: it is UUCP "g"
protocol.  I now most-often use "e" protocol (when feasible).  I "discovered"
"e" protocol two years ago when first setting up StarLAN (1BASE5 802.3e-1988
over twisted-pair) in my lab.  I was extremely unhappy with the 2000 cps
throughput using "standard" UUCP and a colleague recommended HDB UUCP with "e"
protocol which I now use and enjoy an average of 50,000 cps over the same net
with NO other changes (i.e. keeping HDB and going back to "g" protocol again
nets only the 2000 cps).  The protocol is specified in the Systems file (or
the L.sys file with the older UUCP versions) though it can also be specified
in the Devices files.  Maybe someone has the time to implement other protocols
in AmigaUUCP?  Note that one SHOULDN'T use "e" unless one has GOOD modems (or
a good network) and can guarantee reliable end-end connectivity.

One additional note (though I posted a complete set of these specs several
months ago) from the Microcom manuals (they invented MNP):

MNP 5	Class 5 service provides data compression, which combined with Class
	4 allows throughput of almost twice the connection speed.  MNP Class
	5 dynamically adjusts to the type of data being transmitted for
	maximum compression efficiency.

MNP 7	Class 7 service provides Enhanced Data Compression, which combined
	with Class 4 allows throughput of more than twice the connection
	speed ...

MNP 9	Class 9 service includes all the features of MNP CLass 7 Enhanced


Thad Floryan [ thad@cup.portal.com (OR) ..!sun!portal!cup.portal.com!thad ]