title: How to store user-specific data from Android in Google App Engine Datastore. Ancestor or not?
body: <p>I currently have an Android app which uses 3 SQLite database tables and I want to store this data on the cloud in my Java-based GAE app. It will be used as backup and also, the user will be able to view it in their browser upon logging in. The user is entering data into the Android app so all the data in the 3 tables belongs to that user. Is there a recommended way of storing this type of user-specific data? Should I store user email with each entity in order to identify it or have a User entity as the parent and all the entities belonging to this user as the children? Are there any advantages of using a parent in this case?</p>