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From: taylor@glasgow.glasgow.UUCP (Jem Taylor)
Newsgroups: net.mail
Subject: Re: Neighbor optimized away
Message-ID: <532@glasgow.glasgow.UUCP>
Date: Thu, 8-May-86 13:04:03 EDT
Article-I.D.: glasgow.532
Posted: Thu May  8 13:04:03 1986
Date-Received: Tue, 13-May-86 01:07:25 EDT
References: <4509@dartvax.UUCP>
Reply-To: taylor@glasgow.UUCP (Jem Taylor)
Organization: Comp Sci Dept, Glasgow Univ, Scotland
Lines: 26

In article <4509@dartvax.UUCP> steve@dartvax.UUCP (Steve Campbell) writes:
>We run a version of uumail.  It optimizes uucp paths by starting with the
>last (rightmost) host and working backwards until it finds a host that
>our pathalias database knows how to reach.  It then substitutes its path
>to that host for the remaining lefthand portion of the original address.
>
>It turns out that the pathalias "cost" of our link to Z is greater than
>that of path A!B!C!Z, so the optimizer always chooses A!B!C!Z.  This
>effectively makes our link to Z useless, which somehow doesn't seem right.

Sounds like the pathalias cost of A-Z is set up as too large. Two scenarios
are possible:

1) A-Z is cheaper than A-B-C-Z
fix: alter pathalias costs to reflect true cost.

2) A-Z is not cheaper than A-B-C-Z
fix: save money by abandoning direct link.

-Jem.

JANET: taylor%glasgow.uucp@uk.ac.ed.cstvax          -o        Jemima
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JANET: taylor%glasgow.uucp@uk.ac.ed.cstvax          -o        Jemima
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