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A comment on Clockwork raises $21M to keep server clocks in sync. Parent comment

Re:Clockwork raises $21M to keep server clocks in sync by paxys on Saturday March 19, 2022 @12:36AM (#30731063)
Applications like Spanner work with nanosecond-level time difference between datacenters. PTP works in microseconds and can even go up to a few milliseconds, making it useless for actual time sensitive use cases.
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Re:Clockwork raises $21M to keep server clocks in sync by pclmulqdq on Saturday March 19, 2022 @12:48AM (#30731152)
Spanner works fine with millisecond-level timestamps. Spanner needs accuracy, not precision: it relies on knowing the bounds on the the current time, which may be wide.
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Re:Clockwork raises $21M to keep server clocks in sync by welterde on Saturday March 19, 2022 @05:23AM (#30732369)
I think you are confusing PTP and NTP. NTP is in the range of low microseconds to a few milliseconds (with hardware time-stamping can actually do much better than that though), while PTP can synchronize time to better than 100ns.
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