Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP
Path: utzoo!mnetor!lsuc!dave
From: dave@lsuc.UUCP (David Sherman)
Newsgroups: can.general,news.misc,news.admin
Subject: Re: uunet access from Canada
Message-ID: <1911@lsuc.UUCP>
Date: Tue, 7-Jul-87 05:34:20 EDT
Article-I.D.: lsuc.1911
Posted: Tue Jul  7 05:34:20 1987
Date-Received: Wed, 8-Jul-87 06:47:20 EDT
References: <954@van-bc.UUCP> <1477@ncc.UUCP> <959@van-bc.UUCP> <1480@ncc.UUCP> <967@van-bc.UUCP>
Reply-To: dave@lsuc.UUCP (David Sherman)
Distribution: can
Organization: Law Society of Upper Canada, Toronto
Lines: 34
Summary: what's a backbone supposed to be?
Xref: mnetor can.general:468 news.misc:712 news.admin:636

In article <967@van-bc.UUCP> sl@van-bc.UUCP (Stuart Lynne) writes:
>In article <1480@ncc.UUCP> lyndon@ncc.UUCP (Lyndon Nerenberg) writes:
>>In article <959@van-bc.UUCP>, sl@van-bc.UUCP (Stuart Lynne) writes:
>>> 
>>> This actually happened to us the west coast in February. Alberta lost their
>>> ihpn4 link. Feed went from a pretty consistent 1MB of compressed feed per
>>> day to a handful of articles filtering in from back east. Pretty boring 3
>>> weeks!
>>
>>Which is rather strange given that ubc-vision is a backbone site.
>
>Yes, but almost all news comes in from Alberta, not from uw-beaver.

Isn't a backbone supposed to have redundant feeds to deal with ths
problem? In theory, if uw-beaver!ubc-vision is a backbone link, then
any news which doesn't come through the other link should find
its way in through that link.

I know that in some cases this rule is honoured in the breach. At
mnetor, for example, they feed everything to seismo except things
which have already been to clyde and some other sites; which avoids
sending things back to the US that have already been there (and arrived
at mnetor through the backup clyde!watmath!water!utgpu!utzoo!mnetor).
This violates the rule in that it assumes that anything that has
been to clyde will otherwise make it to seismo on its own.  Given
that cost of Datapac/U.S. gatewaying, I don't blame the mnetor
sysadmins for this; I'm just curious as to how much of this happens
on other feeds.

David Sherman
The Law Society of Upper Canada
Toronto
-- 
{ seismo!mnetor  cbosgd!utgpu  watmath  decvax!utcsri  ihnp4!utzoo } !lsuc!dave