nanog mailing list archives
Re: F-ckin Leap Seconds, how do they work?
From: "Robert E. Seastrom" <rs () seastrom com>
Date: Wed, 04 Jul 2012 09:48:30 -0400
Tyler Haske <tyler.haske () gmail com> writes:
Someone running an NTP Server connected to a cesium clock could run the leap-second time code. Since its *their job* to have the correct time, they can do all the fancy rarely used things that make parts of the Internet die every couple of years.
Ah, Tyler, I see the problem here. An NTP server is not like an XML-spitting web server which one consults each and every time one wants to know a piece of data (for instance a stock quote, the weather, or in this case, what time it is). NTP assumes a local clock, and the results of periodic queries to higher-than-or-equal-to-local-stratum servers are used to _discipline_ the local clock, steering it to have minimal error. Local clocks have to be consulted much too frequently (logging, timestamping, etc) for "just put it in the cloud" to work. You might want to read up on NTP (wikipedia provides a reasonable introduction). cheers, -r
Current thread:
- Re: F-ckin Leap Seconds, how do they work?, (continued)
- Re: F-ckin Leap Seconds, how do they work? Christopher Morrow (Jul 03)
- Re: F-ckin Leap Seconds, how do they work? Jimmy Hess (Jul 03)
- Re: F-ckin Leap Seconds, how do they work? Peter Lothberg (Jul 05)
- Re: F-ckin Leap Seconds, how do they work? Jay Ashworth (Jul 03)
- Re: F-ckin Leap Seconds, how do they work? Owen DeLong (Jul 03)
- Re: F-ckin Leap Seconds, how do they work? Steve Allen (Jul 03)
- Re: F-ckin Leap Seconds, how do they work? George Herbert (Jul 03)
- Re: F-ckin Leap Seconds, how do they work? Tyler Haske (Jul 03)
- Re: F-ckin Leap Seconds, how do they work? Majdi S. Abbas (Jul 03)
- Re: F-ckin Leap Seconds, how do they work? Tyler Haske (Jul 03)
- Re: F-ckin Leap Seconds, how do they work? Robert E. Seastrom (Jul 04)
- Re: F-ckin Leap Seconds, how do they work? Jimmy Hess (Jul 04)
- Re: F-ckin Leap Seconds, how do they work? Steve Allen (Jul 04)
- Re: F-ckin Leap Seconds, how do they work? Scott Howard (Jul 04)
- Re: F-ckin Leap Seconds, how do they work? Dave Hart (Jul 05)
- Re: F-ckin Leap Seconds, how do they work? Peter Lothberg (Jul 05)
- Re: F-ckin Leap Seconds, how do they work? Saku Ytti (Jul 03)
- Re: F-ckin Leap Seconds, how do they work? valdis . kletnieks (Jul 03)
- Re: F-ckin Leap Seconds, how do they work? Saku Ytti (Jul 03)
- Re: F-ckin Leap Seconds, how do they work? Owen DeLong (Jul 03)
- Re: F-ckin Leap Seconds, how do they work? Saku Ytti (Jul 03)