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Re: Distribution CPG Protocol - Some Thoughts
- To: firstname.lastname@example.org
- Subject: Re: Distribution CPG Protocol - Some Thoughts
- From: Stephen Thomas <email@example.com>
- Date: Mon, 08 Jan 2001 08:32:17 -0500
- Delivery-date: Mon, 08 Jan 2001 05:32:35 -0800
- Envelope-to: firstname.lastname@example.org
At 02:05 PM 2001-01-08 +0100, Martin May wrote:
>I think we come to the point where it becomes tricky:
>how do we define the "closest" surrogate?
>as long as you are an ISP/access provider you know if you are the closest,
>but how about the cost?
>unfortunately, the "cost" is very important for the choice of
>the appropriate surrogate. you may not want the closest, but
>the cheapest surrogate.
I think Martin's quite right, and it scares me. Having some experience
trying to deal with monetary cost in a communication protocol (different
problem domain - telephony), I'm more than a little nervous. Three things
to consider. (1) Monetary cost is difficult to express uniformly
(currencies, fluctuating exchange rates, jurisdictional issues [of the 150+
government-sanctioned currencies only about 20 are "freely traded"], etc.)
(2) Dealing with money requires air-tight security (people tend to treat
errors non-linearly; how upset would you be if your paycheck were short
$0.50?) (3) Pricing is often non-uniform. (What I charge depends on who's
My advice is to leave monetary cost completely out of the protocol.
Stephen Thomas +1 770 671 1888
TransNexus, Chief Technical Officer email@example.com