Re: NTP clock source

[Valdis.Kletnieks () vt edu]

On Mon, 29 Mar 2010 09:43:25 PDT, todd glassey said:

> Why would you want a S-0 Clock??? You are not a time-space lab, and so
> you would want something like a stratum-2 time source which comes from a
> provable provider. There are laws by the way on what are official and
> non-official sources of time. In the US for instance these are 15 USC
> 271 and 272, and the right to deploy the time is codified in 15 USC 260
> so which source of time is used is important.

Actually reading sections 260, 271, and 272 doesn't seem to actually talk
much about it, and unless you really care in a legal sense if your time is
derived from a WWVB signal or a GPS clock, it probably doesn't matter. OK,
maybe if you're listening to the Canadian radio signal, or the European
competitor to the GPS constellation it matters.  Does anybody *really* care,
given that all these sources are usually synced to each other well enough that
it doesn't matter accuracy-wise?

The reason he wants a stratum-zero clock source is because when he sets up his
server that reads from that clock, it will in NTP-speak end up being a
stratum-1 clock, which is what he wants to deploy, then when he distributes it
to other servers, they'll become the stratum-2 clocks you mention.

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