Re: NTP Sync Issue Across Tata (Europe)

[Masataka Ohta <mohta () necom830 hpcl titech ac jp>]

Forrest Christian (List Account) wrote:

> Depends on how synchronized you need to be.

Sure. But, we should be assuming NTP is mostly enough.

> A rubidium oscillator or Chip Scale Atomic Clock is in the price range you
> quote.  However, these can drift enough that you should occasionally
> synchronize with a reference time source.  This is to ensure continued
> millisecond accuracy.  Of course it all depends on how much drift you'll
> tolerate, and if you're OK with being within a second, then a rubidium
> might be ok.

For millisecond accuracy, Rb clocks do not need any synchronization
for centuries.

Rb clocks on GPS are a lot more frequently synchronized, because
a lot more accuracy is required for positioning (10ns of timing
error means 3m of positioning error).

                                        Masataka Ohta