Delete comment from: Google App Engine Blog
Valuable feature, but would be nice to have this ability within a single app instead at the app-level granularity.
For example, a common use case: apps using a freemium business model would like to offer users the ability to pay and get upgraded to 'highly available' (high replication datastore). This requires both datastores in 1 app and the ability to selectively transition current data to high replication mode.
If it had this ability, appengine could offer a unique and revenue-generating feature: platform-supported "freemium business model" ability that would appeal to app developers, CFO-types, and end users!
Another use case: apps might want to store critical data in high replication (like billing data) and the rest of their data in the normal master/slave datastore.
Jan 9, 2011, 9:57:13 PM
Posted to Announcing the High Replication Datastore for App Engine