Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!ames!lll-winken!netsys!jsheese!jeffery
From: jeffery@jsheese.FIDONET.ORG (Jeff Sheese)
Newsgroups: news.admin
Subject: Re: List of sites with broken Followup (No References) Software
Keywords: g protocol, zmodem
Message-ID: <99.2474C600@jsheese.FIDONET.ORG>
Date: 20 May 89 01:20:08 GMT
References: <318@xdos.UUCP>
Reply-To: jeffery@jsheese.Fidonet.ORG
Followup-To: news.admin
Organization: JStek Enterprises - Frederick, MD
Lines: 35

In an article of <19 May 89 14:34:37 GMT>, doug@xdos.UUCP (Doug Merritt)  
writes:

 >In article <89.247289F5@jsheese.FIDONET.ORG> jeffery@jsheese.Fidonet.ORG 
 >writes:
 >>Well, almost.  Most Fidonet mail transfer programs are able to use
 >>Zmodem file transfer which beats the heck out of G protocol.
 >
 >Why is it better?
 >        Doug

Maybe I'm mis-judging it from the implementation that I'm using, but at 1200  
baud I average 92 cps and at 2400 baud I average 190cps.  This is whether the  
connections are local or via PC Pursuit.  Of course I can't expect much more  
using a packet size of 64 bytes.

It appears that with G, each packet requires an ACK regardless of the window  
size.  With zmodem the transmission of data from origin to recipient is  
continuous, where the recipient tells the sender if any problems occur in  
transmission.  Packet size starts at 1024 bytes at 1200 baud (2048 at 2400  
baud) and adjust themselves according to line conditions.  It even has error  
recovery on partial transfers.

Now I'm not saying one technology is better than another.  Since Fidonet  
software is mainly restricted to one architecture (MSDOS and IBM clones) it  
has been able to progress to a very secure and reliable technology over the  
years.  The code is not designed to be as portable among different hardware  
and software systems as Usenet.  Maybe that makes it an unfair comparison.
 
--  
Jeff Sheese - via FidoNet node 1:109/116
UUCP: ...!netsys!jsheese!jeffery
ARPA: jeffery@jsheese.FIDONET.ORG
(I am sole owner.  My opinions represent my company.)
(Send all flames to null@jsheese.Fidonet.ORG)