On 2017-01-30, David Taylor <david-tay...@blueyonder.co.uk.invalid> wrote: > On 30/01/2017 04:13, sean wrote: >> Hi All, >> >> I'm real interested in NTP and accurate time, hence why I'm on this >> newsgroup. I would like to look into getting a time sensor and I hear >> the Garmin GPS 18X is what some folks run unless they need much more >> precision. Is this still a pretty well regarding GPS unit for pretty >> accurate (I know that's highly subjective) time keeping? This would be >> a hobbyist thing and I'm not running an important business, if you were >> going to ask. >> >> Next question...Do most folks here use the NTPD client, or it is a >> mixture of Chrony and openNTPD? Maybe some folks just go with what ships >> with their OS? >> The comparison chart is pretty nice and lays each option out nicely: >> https://chrony.tuxfamily.org/comparison.html >> >> I think that's all for now. Feel free to provide any URLs to any >> resources I should check out about time sycing, NTP, etc. > > Sean, > > I have been running NTP on multiple systems since 2002, including Linux > and Windows (2000 and later), both with hardware sync (GPS18, GPS18x and > multiple GPS devices for the Raspberry Pi), and with LAN and Wi-Fi > network sources. I find NTP easy to manage and monitor over multiple > systems, and the fact that it runs on Windows, and can accept GPS > devices on Windows very valuable. You can easily get within 10 > microseconds in Linux (but be careful of the temperature and GPS antenna > location), and within 200 microseconds on Windows when using an attached > GPS/PPS device. >
Hi Dave, Thank you for the reply. I found your website about 3 weeks ago and got the urge to checkout GPS devices, like the GPS18, Raspberry pi options, etc. Thank you for it and all of the graphs. You certainly have many Pis keep track of the time! I don't recall, are you apart of the NTP Pool? I found your website to have a wealth of great information that's quite well compiled and thoughout. I hope your health is much better this year and that you're on the road to recovery. Primarily I run FreeBSD and was surprised to learn that it can have better precision than Linux, although the articles I read were FreeBSD 8.0 era. Do you find FreeBSD generic kernel comparable with Linux? From what it sounds like, a Raspberry Pi with the device below will give me "pretty accurate" (my words) time, which I can use to sync my devices in my home. > http://www.satsignal.eu/mrtg/performance_ntp.php > > For the Raspberry Pi: > > > https://store.uputronics.com/index.php?route=product/product&product_id=81 > That's pretty well priced, cheaper than the Garmin > In terms of installations, I think that NTP will have by far the > greatest number, and of the three you listed, only NTP runs on Windows. Well I don't really have any Windows installations, but I will keep NTP in mind when I want to run time syncing on Windows. As an aside, what does Windows natively use to keep time and sync? Thanks, Sean _______________________________________________ questions mailing list questions@lists.ntp.org http://lists.ntp.org/listinfo/questions
