3 ms·
Why are people using HTTPS for time? That would be quite the anti-pattern. Standard NTPD port 123 UDP works fine for most people and using Chrony [1][2] one c
by LinuxBender 2y ago
Why are people using HTTPS for time? That would be quite the anti-pattern. Standard NTPD port 123 UDP works fine for most people and using Chrony [1][2] one can get down to double digit microseconds or even nanoseconds offset depending on their location. If people need lower than that they should be using their own GPS receivers and local stratum-1 servers in each datacenter and then using Chrony with a short poll interval within the datacenter to the edge stratum-1 servers.
[1] - https://chrony-project.org/examples.html https://chrony-project.org/examples.html
[2] - https://chrony-project.org/faq.html https://chrony-project.org/faq.html
- jhart99 2y agoTotally agree. A cheap GPS + Raspberry Pi makes an incredibly capable little NTP server capable of serving 100k clients(after you block the bad actors). The local network is down in the 10s of microseconds. Anything more accurate would need PTO and significantly more investment, but that is more accuracy than I'd ever need.
- LinuxBender 2y agoAbsolutely. Additional benefits on RasPi's is the lower power usage which makes the power capacity folks in the datacenter happy. They are also cheap enough every DC can have two of them so that application and system logs do not drift even if there is a prolonged network outage. There are PDU's that can switch between A and B side power for single power supply devices like these.