[atlas] More even earth distribution of measurement probes
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Marat Khalili
mkh at rqc.ru
Fri Mar 10 14:32:08 CET 2017
My solution, for the record: https://gist.github.com/qm2k/ea5f67fcf4e3dd2208ab3bc4ee233560 -- With Best Regards, Marat Khalili On 10/03/17 11:47, Marat Khalili wrote: > I'd like to check worldwide connectivity to my site. I create a new > measurement via web-interface and add, say, 300 probes, expecting them > to cover most world countries. However, looking at the map > <https://atlas.ripe.net/measurements/7861872/?filter=#map> I notice > that most are selected from Europe: there're two dozens in Netherlands > (many with same ASNs), but only two in Australia, one in Japan and > nothing in Brazil. Obviously, most ATLAS probes are from Europe, and > selection algorithm does not take probe density into account. > > Wouldn't it be nice to have the following features in web-interface > and API: > * even distribution of probes by country or continent based on > population, area, and other user-defined weight numbers; > * avoiding probes with same ASNs > ? > > I don't know how current algorithm works, but easiest modification > would be two-step process: (1) randomly select country based on > specified weights; (2) randomly select probe within country, avoiding > earlier selected probes or ASNs and failing if none are left > available; repeat from step 1 until necessary number of probes is > selected. > > P.S. I tried to manually request 1 probe from each country, but > stumbled on unrecognised country codes, countries with no probes etc. > before even trying population-weighted distribution. Without direct > access to probes database nice solution can be difficult to achieve > via current API, although crude one looks possible. > > P.P.S. I understand this option will create more load on probes in > less-covered countries, but since it's possible to limit selection to > specific countries anyway this is hardly a strong argument against > adding this feature. > > -- > > With Best Regards, > Marat Khalili -------------- next part -------------- An HTML attachment was scrubbed... URL: <https://lists.ripe.net/ripe/mail/archives/ripe-atlas/attachments/20170310/d73794de/attachment.html>
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