I'm no NTP expert so I'm not sure what it does differently, but the more detailed paper is at http://research.google.com/archive/spanner.html

Eric

On Mon, Nov 26, 2012 at 12:40 PM, Russ Allbery <rra@stanford.edu> wrote:
Ted Cabeen <ted@cabeen.org> writes:

> Interesting article on how Google has moved beyond NTP, with a mention
> of last year's leap second:
> http://www.wired.com/wiredenterprise/2012/11/google-spanner-time/

It would be interesting to have more details, since that article makes a
lot of Google not using NTP and then proceeds to describe a network
protocol that sounds exactly like NTP, down to how it distributes stratum
zero clock sources to other systems in the same data center.  So it's not
clear exactly what they changed.

--
Russ Allbery (rra@stanford.edu)             <http://www.eyrie.org/~eagle/>