-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Jan Hoevers wrote:
> I happened to read the explanation of the score routine (tiny link below > the graphs: > http://www.pool.ntp.org/scores/81.216.247.88#graph_explanation ) > just before your mail came in, and I believe the explanation is there. > > The scoring algorithm gives penalties to servers with an offset of more > than 100 millisec. Take a good look at the correlation between the score > history and offset history graphs. Do you agree that this is what's > happening? Yes, I agree. > You describe that your server is not trampoleening like this and you > suspect the network path between the monitoring system and your server. > I agree. > The monitoring system (x3.develooper.com, 63.251.223.163) seems to be in > Pasadena, California, and your server (81.216.247.88) looks like > somewhere in Sweden. Yes, my server is in Sweden. > Now that's quite a network path. I'm playing around with ntp for some > years now, and in my experience ntp works fine over long distance, as > long as the delay is symmetric. Congestion is unlikely at night, but > think of a transatlantic link taken out at nighttime for maintenance. > Consequently there is nothing one can do, except carefully shrug... > > This only demonstrates the limitations of monitoring over long distance. > Well, that's in the explanation too. I have been in the pool since almost the beginning and it's just the last few weeks I have seen this behavior. This behavior also started when I changed my hardware (my old hardware crashed and it took a while to get the new hardware so my server was down for over a week) but since I can't see the same behavior from an other ISP in Sweden so my suspicion is a also congested link. > By the way, I'm a newbie in the pool, I added my server (82.95.234.3) > yesterday after reading this list for a few months, and I survived my > first Turkish spike (175 kb/s) this afternoon around 15:00 UTC :-) > Hello pool members, nice to meet you! Looking forward to the good and > bad things we will share. /Tim -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.7 (GNU/Linux) Comment: Using GnuPG with Fedora - http://enigmail.mozdev.org iD8DBQFG6hI3gy5P5/GLfoQRAk3GAJ4954UikrsN9Yn/BlyIKa8JDzTcQwCbBst3 Gw3m6Pzh1UYAKRsXtgHcuZQ= =rgN/ -----END PGP SIGNATURE-----
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