jack at crepinc.com
Sun Oct 24 12:14:05 CDT 2010
More than likely, it's more important that all your machines are synced
accurately in time to each other, vs. a wider sync range that's
statistically closer to the 'real' value.
On Sun, Oct 24, 2010 at 1:09 PM, Randy Bush <randy at psg.com> wrote:
> > 1) How necessary do you believe in local NTP servers? Do you really
> > need the logs to be perfectly accurate?
> what is "perfectly accurate?" perfection is not very realistic. to
> what use do you put these logs? what precision and jitter are required
> for that use?
> imiho, if you are just comparing router and server log files, run off
> public. if you are trying to do fine-grained measurement, you are going
> to invest a lot in clock and propagation research.
> > 2) If you do have a local NTP server, is it only for local internal
> > use, or do you provide this NTP server to your clients as an added
> > service?
> i would generally let customers chime off routers which are strat 2 or
> 3. if a customer has other needs, then they can deal. if they are
> really concerned, they should not bet on me anyway.
> > 3) If you do have a local NTP server, do you have a standby local NTP
> > server or do you use the internet as your standby server?
> again, depends on your needs.
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