This page is all about databases, their design, how they work, how they replicate etc.
Living without atomic clocks – article about the subject and cockroachdb
Exploiting a Natural Network Effect for Scalable,
Fine-grained Clock Synchronization – pdf link
Amazon time sync service – atomic clock ntp time syncing for AWS based systems.
STORING UTC IS NOT A SILVER BULLET – article about storing timestamps
Setting the time for your Linux instance – amazon cloud