For those that have no other way to monitor their systems, you might try: http://www.vanheusden.com/query_ntp.php
Tim Lundström wrote: > -----BEGIN PGP SIGNED MESSAGE----- > Hash: SHA1 > > Tim Shoppa wrote: > >> Jan writes: >> >>> Uninteresting to you maybe, but it is the answer to Tims question: >>> "don't use the pool stats to monitor your own server". >>> That's the point you missed. >>> >> I know (and most, but not all, server maintainers know) that it >> is monitoring not just the server, but the asymmetric latency >> between the server and the monitoring site. >> > > I know that the monitoring system can't be used as an absolute measure > of the server performance. However for many server admins there are no > other way to at least have an indication of how your server is > performing. In this case I didn't know the IP of the monitoring system > and thus could test the RTT to rule it out as the cause of the strange > behavior. A plot of the RTT would help and the IP of the monitoring > server would make it easier to diagnostic the problem. Even better would > be a distributed monitoring system to reduce the chance that a random > network problem kick servers out of the pool. > > >> Of course there are millions of TCP/IP addresses, so really >> the grand latency matrix consists of millions times millions of >> numbers at any point in time, but having just a single measure >> of a route is better than nothing! >> > > The route between different machines is fairly constant. You can do a > traceroute hours, days, weeks or even month or years apart and the route > is approximately the same. > > >> (In fact there are other global projects to measure WAN latencies, >> and most of them use ntpd with a local refclock to get timing >> resolutions in the microsecond range... with some provisos! Lotsa >> little things pop up once you expect to do this good.) >> >> If, like ntpd, the monitoring site also plotted round-trip-time as a >> function of time of day, it would be even more useful. >> > > /Tim > -----BEGIN PGP SIGNATURE----- > Version: GnuPG v1.4.7 (GNU/Linux) > Comment: Using GnuPG with Fedora - http://enigmail.mozdev.org > > iD8DBQFG6q1agy5P5/GLfoQRAthPAKDAJQB388zzOrS3O81rzUOTi4Qb8QCcCZUR > dzQq8jytQkzntP0MsQhLe7g= > =Li2e > -----END PGP SIGNATURE----- > > ------------------------------------------------------------------------ > > _______________________________________________ > timekeepers mailing list > [email protected] > https://fortytwo.ch/mailman/cgi-bin/listinfo/timekeepers > _______________________________________________ timekeepers mailing list [email protected] https://fortytwo.ch/mailman/cgi-bin/listinfo/timekeepers
