Almost 4 years after launch, we’ve seen fantastic growth both in Google App Engine and the apps that run on it. And although the Master/Slave Datastore was a big part of our early success, it's time to announce the deprecation of the Master/Slave Datastore in favor of the High-Replication Datastore (HRD). HRD has provided us with higher availability and better, more predictable performance. Many upcoming features will be HRD-only and we strongly encourage you to migrate all your applications as soon as possible using the migration toolsfound in the Application Settings tab of the Administration Console. The deprecation period will follow the guidelines set in our terms of service. If you have any questions or concerns, please contact us at email@example.com.
- Posted by Max Ross, on behalf of the App Engine Datastore Team