Spanner

TrueTime is Google’s solution to providing to globally consistent timestamps to determine ordering of events. Originally developed to support the Spanner distributed database, TrueTime is a clock implementation that depends on two key factors: well engineered and accurate GPS and atomic clocks and the representation of time as an interval of uncertainty. Representing TrueTime TrueTime explicitly represents each timestamp an interval that includes bounded time uncertainty. TrueTime represents time as an interval of the type TTinterval, which includes two timestamps for the beginning and the end of the interval. These timestamps have type TTstamp. With this in mind, the TrueTime API provides the following methods reproduced from Spanner: Google’s Globally-Distributed Database: ...