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See: Clock synchronization quality on Windows Azure?

This is not meant as a rant, it is just curiosity.

  • Is a computer really drifting more than a second in a single day? I can barely imagine that.

  • Why not a sync every day to a time server. This should have minimal negative impact compared to the advantages of a (relative) consistent clock among servers.

My gut feeling would be that the biggest problem would be latency, but even that would be just a few ms after every sync. What am I missing?

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Dirk Boer
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    Maybe ask this on ServerFault? It's not a programming question. – David Makogon Jan 31 '15 at 19:04
  • Why do you think machines aren't syncing to a series of time servers? Why do you think a computer won't drift a second in a single day? Many protocols (e.g., Kerberos) are sensitive to drift, so synchronization does happen. Many hardware vendors recognize that accuracy in a computer clock isn't particularly important because computers will regularly resynchronize anyway, so computer clocks can have significant drift over human time scales. – Greg D Feb 01 '15 at 08:38

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