Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP
Posting-Version: version Tektronix Network News Daemon (B 2.10.2 based); site daemon.UUCP
Path: utzoo!watmath!clyde!burl!ulysses!mhuxr!mhuxt!houxm!mtuxo!mtunh!mtung!mtunf!ariel!vax135!cornell!uw-beaver!tektronix!daemon!davest
From: davest@daemon.UUCP (Dave Stewart)
Newsgroups: net.news.b
Subject: Re: Duplicates
Message-ID: <943@daemon.UUCP>
Date: Thu, 11-Jul-85 15:03:52 EDT
Article-I.D.: daemon.943
Posted: Thu Jul 11 15:03:52 1985
Date-Received: Sat, 13-Jul-85 12:24:30 EDT
References: <279d59d3.1de6@apollo.uucp>
Reply-To: davest@daemon.UUCP (Dave Stewart)
Organization: Tektronix, Beaverton OR
Lines: 28

In article <279d59d3.1de6@apollo.uucp> rees@apollo.uucp (Jim Rees) writes:
>Recently I've been getting duplicate articles again.  There doesn't
>seem to be any pattern this time.  They are rejected here, and I
>don't know why they aren't getting rejected downstream.
	...
>Path: wanginst!decvax!mcnc!unc!ulysses!allegra!princeton!down!honey

>Path: wanginst!linus!decvax!mcnc!unc!ulysses!allegra!princeton!down!honey

	Note that when a duplicate article is rejected by rnews, it will
get retransmitted to downstream sites anyway.  The reasoning is that this
makes for higher network connectivity if there is a higher degree of
article redundancy.  Articles are prevented from "looping" around a cycle
in the graph because rnews will not forward an article to any site that
appears in the "Path" header line.

	I might add that our local news administrator has added a sys
file flag that prevents duplicates from being forwarded along.  We use
this on "tektronix", our gateway, when forwarding to other Tek sites,
because they are a captive part of the network being fed by just one
site (tektronix).  Send mail to tektronix!rdoty or tektronix!usenet for
diffs of rnews code, if you are interested.


-- 
David C. Stewart                          uucp:    tektronix!davest
Small Systems Support Group               csnet:   davest@TEKTRONIX
Tektronix, Inc.                           phone:   (503) 627-5418