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Re: [alto] cost symmetry/asymmetry

Richard Alimi <richard.alimi@yale.edu> Tue, 23 February 2010 15:08 UTC

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From: Richard Alimi <richard.alimi@yale.edu>
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Date: Tue, 23 Feb 2010 10:10:04 -0500
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Cc: Picconi Fabio <Fabio.Picconi@technicolor.com>
Subject: Re: [alto] cost symmetry/asymmetry
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Hi Fabio,

> Reading the ALTO protocol draft I noticed that there is no discussion about
> costs being symmetric or asymmetric. Does this mean that you assume
> symmetric path costs ?

Costs are not restricted nor assumed to be symmetric.  This can be made 
explicit in the document.

For some discussion and considerations about directionality and asymmetry in 
the context of P4P, see Section 9.1.2 of:
  http://tools.ietf.org/html/draft-p4p-framework-00

-- 
Richard Alimi
Department of Computer Science
Yale University

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