By Leslie Lamport
Communications of the ACM,
July 1978,
Vol. 21 No. 7, Pages 558-565
10.1145/359545.359563
Comments
The concept of one event happening before another in a distributed system is examined, and is shown to define a partial ordering of the events. A distributed algorithm is given for synchronizing a system of logical clocks which can be used to totally order the events. The use of the total ordering is illustrated with a method for solving synchronization problems. The algorithm is then specialized for synchronizing physical clocks, and a bound is derived on how far out of synchrony the clocks can become.
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