On Wed, Nov 30, 2016 at 12:14 PM, Gary E. Miller <[email protected]> wrote:
> Yo Michael! > > On Wed, 30 Nov 2016 14:21:39 +0000 > Michael Rothwell <[email protected]> wrote: > > > ... was just announced. > > https://cloudplatform.googleblog.com/2016/11/making- > every-leap-second-count-with-our-new-public-NTP-servers.html?m=1 > > I sort of see where they are coming from, but this will cause problems. > > The NTP packets google sends out have no way to be marked as 'not UTC'. > Given how promiscuous people are sharing NTP chimers these 'not UTC' > chimers will get into the mix. When they diverge from the real UTC servers > it will sorely confuse NTP clients. > No, not confused at all NTP is designed to detect this problem. The Google servers will be detected as "False Tickers" and ignored. Of course some clients might be configured to look ONLY at Google servers but those people like did that on purpose because they wanted to wrong time. Anyone with a normal NTP client that uses several different servers will be fine. The for people who don't know how Ntp works, it is simple: If you (a human) ask a bunch of people "what time is it?" you would expect them all to give you the same answer (within the precision of their wrist watches) and if one person tells you something that is very different from everyone else. You do NOT become confused you just say to yourself "His watch must be wrong," then you ignore his answer." NTP clients do about this same thing. This is why we configure our NTP clients to query a wide and diverse group of servers, so as to detect problems. So,.. Google will not poison the pool e of NTP servers, Google's incorrect time will not propagate very far. > > I would support an RFC to mark the type a time an chimer is servings. > Not only smeared and UTC, but also TAI, UT, UT0, UT1, UT2, ET, TDT, TDB, > TT, TCG, TCB, GPS, etc... > No, that is the wrong way to do it. Then no one flavor of time has enough servers to make the system work. A better way is to agree that all NTP servers use UTC and then distribute the corrections from UTC to the other flavors and those who need to to the conversions can do so. > RGDS > GARY > ------------------------------------------------------------ > --------------- > Gary E. Miller Rellim 109 NW Wilmington Ave., Suite E, Bend, OR 97703 > [email protected] Tel:+1 541 382 8588 > > _______________________________________________ > time-nuts mailing list -- [email protected] > To unsubscribe, go to https://www.febo.com/cgi-bin/ > mailman/listinfo/time-nuts > and follow the instructions there. > -- Chris Albertson Redondo Beach, California _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
