On Oct 18, 2011, at 12:38, Chuck Swiger wrote: >> 2. Where, geographically are the monitoring servers located? > > I believe the monitoring is located in California, CA. Ask would be able to > provide more specific details.
Yup, Los Angeles, CA. I'll probably add a second IPv6 monitoring node in Europe relatively soon and if that works okay then monitor v4 nodes from there as well. Originally I thought this was a problem, but it turns out that at the precision we target ("better than 100ms") it's a complete non-issue even for monitoring servers on slow and weird internet connections on the other side of the planet from here. >> How do they cope with issues with routing failures on the internet between >> them and the NTP >> hosts, where such failures may not be immediately rectified by intermediary >> ISPs? > > They get their ISP to fix it. > > If the monitoring network is down, it's also likely that the NTP pool DNS > servers are also unreachable or not providing fresh results, but that's > hardly the end of the world-- other nameservers across the net would be > caching the results for some time, and existing NTP clients would continue to > operate without change. That's right. It's basically not as much of a problem as it sounds. >> Is monitoring done from multiple independent ASes? > > Not at this time, I don't believe. ... and when it does the plan is that a failure from any of the monitoring nodes will subtract from your score; so it'll mean everyone will be MORE likely to have lower scores, not less. :-) - ask _______________________________________________ pool mailing list pool@lists.ntp.org http://lists.ntp.org/listinfo/pool