You’ve doubtless seen those ubiquitous clock modules, especially when setting clocks for daylight savings time. You know the ones: a single AA battery, a wheel to set the time, and two or three hands ...

You'd think that synchronizing the clocks across a fleet of modern servers is a solved problem, but it's actually quite a hard challenge to solve, especially if you want to get to nanosecond accuracy.

Add Yahoo as a preferred source to see more of our stories on Google. You'd think that synchronizing the clocks across a fleet of modern servers is a solved problem, but it's actually quite a hard ...