NTP Precision Limitations

Discussions focus on the limitations of NTP in terms of precision, security, and reliability for high-accuracy needs, with frequent mentions of alternatives like PTP, chrony, and GPS-based syncing.

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e.g TL CPU au.pool TP PTP MITM DNS www.pool DR ntp clock clocks synchronization server sync syncing atomic tcp network

Sample Comments

shin_lao • Feb 16, 2017 • View on HN

NTP isn't enough, you need PTP.

jruohonen • Jan 26, 2024 • View on HN

About time, given NTP's debatable (in)security history.

Cshelton • Sep 21, 2018 • View on HN

Ah, I've never had a use case for anything more accurate than NTP

simcop2387 • Sep 28, 2017 • View on HN

I wonder if any of the other ntp implementations (chrony et al) suffer from this same issue?

angersock • Jul 24, 2014 • View on HN

Should've used NTP or PTP.

xorcist • Dec 20, 2014 • View on HN

SNTP is close to useless. Your time server could be off and you'd happily follow along.

scurvy • Jun 29, 2015 • View on HN

You aint running ntp if you need nanosecond precision and accuracy.

beervirus • Sep 8, 2021 • View on HN

Why not just use NTP to get time data from someone else’s (more accurate) atomic clock?

brohee • Jun 18, 2019 • View on HN

Best case NTP is in the order of millisecond precision. Completely inadequate for this case.

WelcomeShorty • Apr 26, 2023 • View on HN

Why the complexity of NTP (network & internet) when you could use a GPS syncing wall clock for much less?