[EMAIL PROTECTED] wrote: > On Sun, Jan 07, 2007 at 12:30:59AM -0500, Danny Mayer wrote: >> [EMAIL PROTECTED] wrote: >>> I've got two (x86_64 Linux) machines between which I need to >>> determine the relative time difference. The problem is, the >>> machines are not directly connected and only one is connected to >>> the Internet. >>> ... >> What do you think that NTP does? and why don't you think that after 20+ >> years of engineering that it doesn't do a much better job? > > I think NTP syncrhonizes one computer's time to another. > > However, the two computers in question don't have a direct > connection. And syncing the one machine to the common server via > NTP through VPN is not what I want to do. >
You don't need to. You can just set up a machine that *can* connect to both and use ntpq -p to look at the offsets in the billboard. > In our application, we need to know if there's even a few > milliseconds of time difference between the two machines... and I'm > just looking for some feedback on how I can accurately measure that > difference. > Then they really *should* be connected and synchronized to each other. What happens if they do disagree by a few milliseconds? If that's a business/scientific requirement then you need to buy and install refclocks for each of them and configure NTP to use them. > And I'm even curious about what kind of time difference we should > expect when both machines are NTP time sync'ed, albeit to different > NTP servers. > What is your *requirement*? An NTP network can be designed to meet whatever your needs are. The needs will dictate how much money you need to spend to meet those requirements. Danny > Thanks, > Matt > > _______________________________________________ > questions mailing list > [email protected] > https://lists.ntp.isc.org/mailman/listinfo/questions > _______________________________________________ questions mailing list [email protected] https://lists.ntp.isc.org/mailman/listinfo/questions
