> a specialized hardware solution that uses both GPS and atomic clocks to ensure a minimal clock skew across servers Maybe I'm wrong, but pretty much anyone wi

> a specialized hardware solution that uses both GPS and atomic clocks to ensure a minimal clock skew across servers Maybe I'm wrong, but pretty much anyone with a DC is going to use Microsemi (previously Symmetricom) grandmaster clocks with all the bells-and-whistles including the internal Rubidium atomic oscillator along with PTP to keep everything in sync with multiple layers of redundancy. A specialized hardware solution that uses "both GPS and atomic clocks" to guarantee ~15ns RMS to UTC are just a shopping cart away.