If this blog post is to be believed, Google's uses atomic clocks to keep timestamps globally consistent in spannerdb http://blog.mikiobraun.de/2013/03/more-google-papers-megastore-spanner-voted-commits.html …
7:36 AM - 3 Jan 2016
0 replies
0 retweets
1 like
Loading seems to be taking a while.
Twitter may be over capacity or experiencing a momentary hiccup. Try again or visit Twitter Status for more information.