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Path: utzoo!watmath!clyde!rutgers!mit-eddie!jbs
From: jbs@mit-eddie.UUCP
Newsgroups: comp.mail.uucp,comp.mail.misc
Subject: Re: Suggestions for assigning pathalias value for grey-area connectivity
Message-ID: <4729@mit-eddie.MIT.EDU>
Date: Mon, 2-Feb-87 18:00:42 EST
Article-I.D.: mit-eddi.4729
Posted: Mon Feb  2 18:00:42 1987
Date-Received: Tue, 3-Feb-87 19:08:55 EST
References: <804@smeagol.JPL.NASA.GOV>
Reply-To: jbs@eddie.MIT.EDU (Jeff Siegal
Organization: MIT, EE/CS Computer Facilities, Cambridge, MA
Lines: 26
Xref: watmath comp.mail.uucp:219 comp.mail.misc:68

In article <804@smeagol.JPL.NASA.GOV> earle@smeagol.JPL.NASA.GOV (Greg Earle) writes:
>You [...] poll systems once each hour, [...]
>between Midnight and 8 AM.  [...] you only poll a system if there
>is a workfile for it.
>
>[...] what do you assign [...] for pathalias cost data?
>DEMAND only makes sense [...] if [...] *anytime* there is
>outgoing traffic, uucico is called.  Here, it's only allowed in the evening,
>not anytime.  [...], EVENING is wrong also, since there's no
>guarantee that the site will even be called at all (in fact, it might not even
>be called the whole week, if there's no traffic!)

It's EVENING.  The pathalias data is bidirectional only in that it
assumes a DEAD link exists in the opposite direction.  This will be
used for routing only as a last resort.  Don't make it any lower than
EVENING (say DEMAND+LOW), because then mail might be routed through
your machine when it could go a different way and not have to wait 10
hours or more (if it arrives in the morning)

Suggestion: Set up crontab so the system gets called once every day or
two (or more if phone costs are a major factor), to insure at-least
minimal connectivity in the reverse directory.  Remember though, that
the EVENING/DEMAND/etc. labels don't imply anything beyond that
minimal level of reverse service.

Jeff Siegal