In article <[EMAIL PROTECTED]>, [EMAIL PROTECTED] (David Woolley) writes: >In article <[EMAIL PROTECTED]>, >[EMAIL PROTECTED] wrote: > >> Is this statistic just "too good to be true"? Or did I luck out when I >> bought this box many years ago? > >No. If anything it is bordering on the too big to be good. This is >one of the main reasons why I think that ntpd should be much more reluctant >to apply corrections of more than about 3 to 5 ppm, once the frequency has >been calibrated. My feeling is that it should limit the corrections to >this range unless there is an extended period indicative of a different >frequency. It might be reasonable to allow, say, 0.1ppm per day to >account for long term drift.
The short term drift depends strongly on the temperature. http://www.megapathdsl.net/~hmurray/ntp/drift.gif The big spike on the pink at -14 and -38 is the self heating on the CPU crystal from a big cron job. The small blue spike is the self heating on the crystal driving the TOY clock. -- The suespammers.org mail server is located in California. So are all my other mailboxes. Please do not send unsolicited bulk e-mail or unsolicited commercial e-mail to my suespammers.org address or any of my other addresses. These are my opinions, not necessarily my employer's. I hate spam. _______________________________________________ questions mailing list [email protected] https://lists.ntp.isc.org/mailman/listinfo/questions
