North American Network Operators Group
Date Prev | Date Next |
Date Index |
Thread Index |
Author Index |
Historical
Re: NTp sources that work in a datacenter (was Re: Is latency equivalent
- From: bmanning
- Date: Wed May 14 11:30:38 2003
> >in every PoP to do measurements. In that case, the difficulty isn't in
> >measuring one-way latency, it's in synchronizing the time on all the
> >servers. And with fairly cheap GPS and CDMA clocks that is a lot
> >easier/cheaper than it once was.
a robust mesh of strat-2 chimers gives one more resilence
and more accuracy than syncing off a single source.
> But what GPS clock can you install in a datacenter? AFAIK, they all
> require roof (or at least window) access in order to install the
> antenna. (At least, all the GPS based ntp servers I've looked at do).
> Is that not true of CDMA servers?
some GPS, some PPS, and an atomic source here and there
give great diversity and only a few need roof access.
> How have others solved this issue? (Short of owning their datacenters.)
Use NTP, run most systems as strat-2
--bill
|
