On Sun, 11 Sep 2005, Ask Bjørn Hansen wrote:
> Date: Sun, 11 Sep 2005 21:42:19 -0700
> From: Ask Bjørn Hansen <[EMAIL PROTECTED]>
> To: [email protected]
> Subject: [time] Nearby servers
> Sender: [EMAIL PROTECTED]
>
>
> This is for the people advocating that the empty-ish country zones
> should be filled up with other nearby servers.
>
> I probably won't do that, but we can do something else to the same
> effect.
>
> However, to make it work I need a "map" mapping countries to other
> nearby countries.
>
> dk => se,no,de,uk
> mx => us
> gt => mx,us
> ca => us
Great ; can we assume (for all practical purposes) that
the relation is symmetrical ? That is
.xx => .yy implies .yy => .xx
If yes, we only have to specify half as many relations ;
I propose to list (on the right side) only the region
codes that are alphabetically higher ; for example
de => fr nl
be => de fr nl
would imply
fr => be de
nl => be de
Exceptions can be denoted as
ch => -fr
meaning 'fr' is close to 'ch', but 'ch' isn't close to 'fr'.
The region zone fill up scheme for a region code would be :
1- pick servers from the region
21 if need more : pick servers from neighbour countries
22 if need more : pick servers from neighbour of neighbour countries
23 etc
3- if need more : pick servers from parent continent
4- if need more : pick servers from global
Correct ? Is (1,3,4) the current scheme ?
I can do a simpel neighbour map of Europe ; are there known exceptions
to the rule "IF xx and yy share a border THEN they are close ;" ?
> - ask
Henk Penning
PS. Lets talk about 'regions' (geographical units) instead of
'countries' (polical units) to avoid discussions about
what is or isn't a country.
HPP
---------------------------------------------------------------- _
Henk P. Penning, Computer Systems Group R Uithof CGN-A232 _/ \_
Dept of Computer Science, Utrecht University T +31 30 253 4106 / \_/ \
Padualaan 14, 3584CH Utrecht, the Netherlands F +31 30 251 3791 \_/ \_/
http://www.cs.uu.nl/staff/henkp.html M [EMAIL PROTECTED] \_/
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