On Tue, Apr 22, 2008 at 2:42 PM, Steve Kostecke <[EMAIL PROTECTED]> wrote:
> On 2008-04-22, maxime louvel <[EMAIL PROTECTED]> wrote: > > > My goal is to achieve a synchronisation between the nodes (not > > with the public NTP server) within 50 usec. > > You may want to explore other synchronization options such as IRIG, > distributed PPS, or a distributed 10MHz clock. Thanks I'm gonna look at some other synchronisation solution. > > > >I don't care if the synchronisation to the public NTP is accurate > >around half a second. > > You're displaying a common misconception about NTP. > > The goal of NTP is not explictly to synchronize clocks to "the one > true time". Rather, NTP synchronizes clocks to a common time base. A > "better" time base, and a "better" distribution method, allows tighter > synchronization between nodes. > > It so happens that UTC (via GPS or HF Radio or UDP) is a ubiquitous, > stable, and relatively inexpensive time base. A side effect of using UTC > as your time base is that your clocks are synchronized to the correct > time. Sorry I haven't express myself correctly. What I meant is that I want an accuracy of 50 usec within my subnet and I want my whole subnet to be synchronised to UTC with an accuracy of 1 second or less if possible. > > > -- > Steve Kostecke <[EMAIL PROTECTED]> > NTP Public Services Project - http://support.ntp.org/ > > _______________________________________________ > questions mailing list > [email protected] > https://lists.ntp.org/mailman/listinfo/questions > -- Maxime Louvel 0044 7964 5555 80 43 Allen road Whitemore reans WV60AW Wolverhampton United Kingdom _______________________________________________ questions mailing list [email protected] https://lists.ntp.org/mailman/listinfo/questions
