> 1) Does windows really implement NTP? I thought it was SNTP. Apparently, in current versions of Windows, it is a home-cooked version of an NTP client. All I know is that my PC stays accurate within a very small fraction of a second while synchronizing from my NTP server (the UNIX machine sitting next to the Windows machine on my LAN), and I'm not using anything other than the standard Windows built-in client. About the only parameter I've adjusted has been the synchronization interval: by default, it's set to a week, and I've set it to seven minutes (synchronization costs nothing between two machines on a LAN).
I used to use a payware synchronization client, but when I discovered that the built-in client was just fine as long as the polling interval was short enough, I stopped using the payware. The main problem with the built-in client just seems to be that it waits so long between synchronizations: days, in other words, whereas the average PC is off by several seconds each day if not constantly corrected. It's possible to improve the accuracy of system time enormously just by shortening the interval to once or twice a day, depending on how much accuracy you want or need. > 2) PC hardware running Linux/xBSD and the NTP reference > implementation, runs very well att polling rates of 1024 seconds or > longer. (Keeping sub 1ms accuracy towards local S1-servers.) My BSD server keeps the "master" time for my (two-machine) LAN. Windows is a client to the BSD machine, which in turn is is a client to a couple of reliable time servers out on the Net. It all works extremely well and the machines tend to stay synchronized to well within perceptual accuracy, although I imagine they are probably out of sync by some milliseconds (or perhaps not!). I do occasionally see "failed to synchronize" on the Windows side when I try to force a synchronization, but when allowed to synchronize on its own, it's right on the mark. -- Anthony _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.