Explaining an index structure of Google Cloud Datastore as well as underlying components such as Google File System (Colossus), Bigtable and Megastore. Session video (Japanese) https://youtu.be/H-tZUZGBo60?t=8524 2016/11/08 ver1.0 Published 2016/11/11 ver2.0 Add notes on Spanner 2017/02/09 ver2.1 Fix on Spanner's consistency description.Read less