Hi Group,

I am looking into the various files used by the OR’s and OP’s and would like to 
know more about the GEOIP file and use.  I have already seen in the 
dir-spec<https://gitweb.torproject.org/torspec.git/blob/HEAD:/dir-spec.txt#l1522>
 document that these GEOIP’s are created in the “Extra-info” document and 
relate to country codes for bridges and in turn was referred to the 
blocking.pdf<https://svn.torproject.org/svn/projects/design-paper/blocking.pdf> 
document, which went a bit further in the same vein.

The blocking.pdf (Design of a blocking-resistant anonymity system, Tor Project 
technical report, Nov 2006) suggests "the compressed GEOIP database is only a 
few hundred kilobytes”, but the geoip file on my relay is about 2MB.  Is this 
just because it is decompressed, now a much larger DB or is not the DB being 
referred to in the document?

The geoip file has 82,363 different Country Code entries listed.  What do they 
relate to, as this would far exceed the bridges and relays?

I seem to remember (but now cannot find the reference) that the geoip’s have 
been responsible for improving the routing of data or selection of relays for 
circuits.  Is this correct and how does this work?

I would appreciate an explanation or a point in the direction of the 
appropriate documentation, thanks.

Yours sincerely

Mike Fikuart IEng MIET

Mobile: 07801 070580
Office: 020 33840275
Blog: mikefikuart<mikefikuart.wordpress.com>
Skype: mikefikuart<skype:mikefikuart?call>
Twitter: mikefikuart<https://twitter.com/#!/MikeFikuart>
LinkedIn: mikefikuart<http://www.linkedin.com/in/mikefikuart>

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