Re: [Sks-devel] sks-keyservers.net: Calculation of SRV weights

[Kristian Fiskerstrand]

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On 06.05.2012 01:01, Kristian Fiskerstrand wrote:
> Hi,
> 
> I've been playing around with some thoughts on how to improve the 
> calculation of DNS Service Record (SRV) weights lately[0]. I
> would, however, like to make use of the experience of others in
> continuing this process.


I have then implemented[1, 2] a working prototype of an updated
version of [0] taking into account response-times as measured from 3
different locations in Europe (I welcome more, if anyone is up for
running a measuring client[3, 4]).

Currently weights are only created for an EU pool, but this approach
should make it easier to also create other geographical pools (only
clients needs to be installed, instead of a full mirror of the site)

Bandwidth adjustments are currently not implemented.

My test server can be accessed at [5].


########################################################
Current data
########################################################
Initialization variables;
$max_R = 50; // n in document
$error_adjustment = 10; //phi
$alpha = 100;
$beta_R = 1;
$beta_B = 1;
$beta_P = 1;
$rho = 100; // Addon for reverse-enabled server
$y = 2;

And the current weights are
Array
(
    [keyserver.ccc-hanau.de] => 150
    [ice.mudshark.org] => 135
    [key-server.org] => 45
    [keyservers.org] => 1557
    [pgp.uni-mainz.de] => 36
    [keyserver.fug.com.br] => 0
    [keyserver.oeg.com.au] => 225
    [schluesseldienst.hauke-lampe.de] => 274
    [pgpkeys.mallos.nl] => 0
    [keyserver.fr] => 30
    [pks.aaiedu.hr] => 0
    [sks.spodhuis.org] => 484
    [keyserver.pki.scientia.net] => 180
    [keyserver.rayservers.com] => 148
    [keys.stueve.us] => 149
    [pgp.codelabs.ru] => 260
    [liberty.antagonism.org] => 152
    [pgp.cert.am] => 177
    [test.surfnet.nl] => 114
    [pgp.rediris.es] => 0
    [keyserver.cais.rnp.br] => 132
    [sks.es.net] => 134
    [keys.niif.hu] => 218
    [keyserver.novomundo.com.br] => 149
    [zimmerman.mayfirst.org] => 322
    [dionysus.ugcs.caltech.edu] => 142
    [keys.wuschelpuschel.org] => 0
    [sks.karotte.org] => 305
    [keys.n3npq.net] => 143
    [keys.jbj.org] => 146
    [keyserver.layer42.net] => 140
    [www.mainframe.cx] => 136
    [sks.powdarrmonkey.net] => 170
    [keyserver.durcheinandertal.ch] => 403
    [keyserver.leg.uct.ac.za] => 157
    [keyserver.serviz.fr] => 173
    [disunitedstates.com] => 160
    [sks.keyservers.net] => 150
    [keyserver.searchy.nl] => 141
    [key.ip6.li] => 208
    [pgp.circl.lu] => 153
    [pgp.skewed.de] => 142
    [research.nxfifteen.com] => 140
    [keyserver.computer42.org] => 149
    [gpg.NebrWesleyan.edu] => 143
    [kronos.key-servers.de] => 151
    [keyserver.stack.nl] => 171
    [orion.stueve.us] => 132
    [keys.thoma.cc] => 156
    [keys.keysigning.org] => 135
    [keyserver.cns.vt.edu] => 159
    [keys2.kfwebs.net] => 224
    [pgp.net.nz] => 127
    [pgp.mit.edu] => 250
    [nemesis.key-servers.de] => 134
    [pgpkeys.eu] => 152
    [keyserver.saol.no-ip.com] => 280
    [pgpkeys.co.uk] => 360
    [keyserver.veloxis.de] => 483
    [keyserver.kim-minh.com] => 155
    [keys.sugarlabs.org] => 161
    [keyserver.reinig-it.de] => 143
    [keys.bz] => 141
    [keys3.kfwebs.net] => 252
    [gpg.spline.inf.fu-berlin.de] => 334
    [keys.kfwebs.net] => 421
    [keyserver.gingerbear.net] => 0
    [keyserver.rainydayz.org] => 0
    [keys.riverwillow.net.au] => 143
    [keyserver.colliertech.org] => 168
    [keys.indymedia.org] => 138
    [sd-27509.dedibox.fr] => 151
    [keyserver.wetnet.net] => 138
    [keyserver.adamas.ai] => 144
    [hyperion.key-servers.de] => 155
)


[0] http://kfwebs.com/sks-keyservers-SRV.pdf
[1] http://code.google.com/p/sks-keyservers-pool/source/detail?r=107
[2] http://code.google.com/p/sks-keyservers-pool/source/detail?r=108
[3]
http://code.google.com/p/sks-keyservers-pool/source/browse/trunk/sks-keyservers.net/clients/key_retrieval.php
[4]
http://code.google.com/p/sks-keyservers-pool/source/browse/trunk/sks-keyservers.net/clients/key_retrieval.pl
[5] http://keys2.kfwebs.net

- -- 
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Kristian Fiskerstrand
http://www.sumptuouscapital.com
Twitter: @krifisk
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Corruptissima re publica plurimæ leges
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