On 2012-07-13, E-Mail Sent to this address will be added to the BlackLists <[email protected]> wrote: > unruh wrote: >> Fritz Wuehler wrote: >>> That's all very nice but it says on the ntp.org page to >>> use a national server if you have one. Mine happens to >>> not be very good but that doesn't mean I shouldn't use >>> it if it was good. >> >> No idea where it says that, but if it does it is bad >> advice in your situation. >> IF you are a server for a bunch of other machines that >> really need accurate time (eg stock traders, airlines,etc) >> then it might be good advice. >> For a home user who has spent no time trying to figure >> out what his requirements are who sits on an adsl line say, >> it is terrible advice, since it clogs up the national server. > > > Geographicly Local Pool Servers (of any stratum): ><http://www.pool.ntp.org/en/use.html> > ... <BlockQuote> > As pool.ntp.org will assign you timeservers from all over > the world, time quality will not be ideal. > You get a bit better result if you use the continental > zones (For example europe, north-america, oceania > or asia.pool.ntp.org), and even better time if you use > the country zone (like ch.pool.ntp.org in Switzerland) > - for all these zones, you can again use the 0, 1 or 2 > prefixes, like 0.ch.pool.ntp.org. ></BlockQuote> ...
Clearly a total miscommunication. I had thought that you were advocating using a server like nist.org, a national stratum 1 primary timeserver, when you were advocating using the pool local to your own country. I certainly have no objection to the latter. It is good advice ( although some have said it occurs automatically now). So, if that is what you meant, I totally withdraw my objections. > > > > > Hand configuration of Stratum One Servers > (instead of, or in addition to pool servers): > ><http://support.ntp.org/bin/view/Servers/RulesOfEngagement> ><BlockQuote> > As the load on the hosts supporting NTP primary (stratum 1) > time service is heavy and always increasing, > clients should avoid using the primary servers whenever possible. Precisely what I was trying to say. > > In most cases the accuracy of the NTP secondary (stratum 2) servers > is only slightly degraded relative to the primary servers, > and as a group, the secondary servers may be just as reliable. > > As a general rule, a secondary server should use a primary server > only under the following conditions: > > The secondary server provides synchronization to a sizable population > of other servers and clients on the order of 100 or more. > > The server operates with at least two and preferably three other > secondary servers in a common synchronization subnet designed to > provide reliable service, even if some servers or the lines > connecting them fail. > > The administration(s) that operates these servers coordinates > other servers within the region, in order to reduce the > resources required outside that region. > > Note that at least some interregional resources are required > in order to ensure reliable service. ></BlockQuote> ... > _______________________________________________ questions mailing list [email protected] http://lists.ntp.org/listinfo/questions
