In <[EMAIL PROTECTED]> Brad Knowles <[EMAIL PROTECTED]> writes:
> At 10:46 AM -0500 2005-09-09, wayne wrote:
>
>> Links that cross oceans tend to have high jitter and high latency.
>> Ending up with an NTP server that is half way around the world is
>> going to cause you to have something like a 100ms minimum delay.
>> (65ms for the speed of light, but electric signals only travel at
>> 2/3c, plus router delays, etc.)
>
> [...]
> You cannot make assumptions about how traffic will flow
> topographically within a given geographical region. And the worst
> possible mistake you could make would be to build them into
> pool.ntp.org.
I think you are overstating the problem and I haven't heard a lot of
complaints about the current {europe,asia,north-america}.pool.ntp.org.
>> Even filling in with random servers from around the world will allow
>> for automated config scripts to work today.
>
> And those automated scripts could just as easily use
> 0.pool.ntp.org, 1.pool.ntp.org, etc..., without causing us any
> additional work, without the likelihood of creating more network
> topological problems than they can resolve, and without messing up
> anything for the future.
Even in the cases of bad routing in a given region, filling out
country code, continental and timezone entries would be unlikely to
make things *worse*. Filling out the zones, in the limiting case, is
identical to using just the global pools.
Even something like KR and JP being in the same "continent" or
timezone pool and having KR -> US -> JP -> US -> KR is not as bad as
KR -> US -> NL -> US -> KR, which is the kind of thing you will likely
get with just using the global pools.
>> Despite being about the same longitude, I'm pretty sure that the
>> people in Peru use a different timezone than the people in Maine,
>> mostly due to daylight savings time differnces.
>
> Here's a hint -- NTP works exclusively in UTC. It doesn't know
> about time zones. It doesn't care about time zones.
Hey Brad. Here is a hint. Please get a clue and read what I wrote.
I never said anything about NTP knowing about timezones. I talked
about configure scripts.
-wayne
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