Part 2: Atomic Clocks, The Source of Truth This is Part 2 of a 5-part series on clock synchronization in distributed databases, covering CockroachDB and Aurora DSQL. Part 1 : The Physical Clock Problem (quartz, NTP, drift) Part 2 : Atomic Clocks, The Source of Truth (you are here) Part 3 : The Hybrid Logical Clock, CockroachDB's Solution Part 4 : Uncertainty Intervals, MVCC, and Transaction Restarts Part 5 : Aurora DSQL, When You Can Assume Atomic Clocks I...