TrueTime is not a timestamp, but a time with a spread which reflects the maximum difference in time between two data centers. If i understand correctly, if the

TrueTime is not a timestamp, but a time with a spread which reflects the maximum difference in time between two data centers. If i understand correctly, if the size of this increases too much, this brings down the number of transactions per second which can be done, so keeping the spread small is key. Hence the atomic clocks etc.