The Datastore is the facility used to persist the data of the applications.
In the standard Triangular development configuration this is provided by the Server (GAE version), both local and on the Google App Engine.
Locally the data is stored as a file in directory ... \war\WEB-INF\appengine-generated\ as files local_db.bin and
datastore-indexes-auto.xml.
On the Google App Engine Site. the BigTable technology is used to store and replicate the data.
Data is stored on the Datastore using the Key Structure and using the record format defined by
Record Structure. It also maintains an internal integer key called the GekID.
The administrative records for the SuperUser, AdminUsers and Users are also stored there using a special key structure protected by the Server from unauthorized access.
Refer to Datastore Related to see how to access the raw records.