[ntp:questions] More Granularity in the US in the NTP Pool

Ryan Moore rmoore at rmoore.dyndns.org
Sun Sep 9 00:10:05 UTC 2007


The problem with this suggestion is that NTP is mostly effected by the 
round trip delay on the network.  The RTD on the network may have little 
to do with the physical location of the servers.  If you are part of a 
national ISP, it may be faster to go to a server on the same provider, 
regardless of the physical location of the server.

Whereas another server in your same town may require going through some 
large ISP junction point which slows down the RTD.

Even if a server is physically 1 mile from you, the route between you and 
that server may go through a network junction a long way from you if you 
use different ISPs.


On Sat, 8 Sep 2007, evandro at mailinator.com wrote:
> Given the size of the US, wouldn't it make sense to narrow further
> down the servers in the NTP pool for the US, if not down to states
> (e.g., tx.us.pool.ntp.org) at least down to time-zones (e.g.,
> cst.us.pool.ntp.org) in order to improve the delay to the reference
> hosts?
>
> Or perhaps more genericaly, why not in addition to countries also
> group servers by continental time-zones in order to achieve the same
> throughout the world, say cst.north-america.pool.ntp.org (US/Central),
> wet.europe.pool.ntp.org (W. Europe), cst.oceania.pool.ntp.org
> (Australia), etc?
>
>




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