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.
-Jack Carrozzo On Sun, Oct 24, 2010 at 1:09 PM, Randy Bush <ra...@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. > > randy > >