At 10:16 AM +0200 2005-09-12, Henk P. Penning wrote:

   Please read again ; I asked if it is true that

     A is close to B  -->IMPLIES-->  B is close to A

   If it is true, the config file can be half as big ; thats all.

I understood that, and I gave a counter-example. If you go to the CIA World Factbook and pull up a page on a given country, you'll find a list of border countries specified. Try doing a full listing, and I think you'll find that the matrix is relatively sparse. All sorts of countries may be directly bordering other countries, but that doesn't necessarily mean that any of those border countries are necessarily close to any of the other border countries.

If that were the case, then all of Europe would be filled with points where four or more countries touch or come very close together, and that's just not what happens.

   For what countries would 'region close first' be worse than
   'europe random' ?

   If it is true in the majority of cases, it is a good first
   approximation. Exceptions can be easily specified.

But it's still a lot of work for marginal additional value, and as network connections go up/down or get congested, etc... the network topology is going to be relatively far away from the simple case of knowing what country you're in, and considerably further away from knowing what countries you're close to.

That sort of thing would be appropriate for someone who was trying to tweak the last nanosecond out of their clock, and I don't believe that's a suitable target market for the pool.


Now, this would be an interesting exercise for a computer science class, looking at graph theory or somesuch, but it's a lot of work for relatively little operational benefit.

--
Brad Knowles, <[EMAIL PROTECTED]>

"Those who would give up essential Liberty, to purchase a little
temporary Safety, deserve neither Liberty nor Safety."

    -- Benjamin Franklin (1706-1790), reply of the Pennsylvania
    Assembly to the Governor, November 11, 1755

  SAGE member since 1995.  See <http://www.sage.org/> for more info.
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