*Hey App Engine Users,* * Almost 4 years after launch<http://googleblog.blogspot.com/2008/04/developers-start-your-engines.html>, 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<http://googleappengine.blogspot.com/2012/01/happy-birthday-high-replication.html> . Many upcoming features will be HRD-only and we strongly encourage you to migrate all your applications as soon as possible using the migration tools<https://developers.google.com/appengine/docs/adminconsole/migration> found in the Application Settings tab of the Administration Console. The deprecation period will follow the guidelines set in our terms of service<https://developers.google.com/appengine/terms#Deprecation>. If you have any questions or concerns, please contact us at ms-datastore-deprecat...@google.com.* * * *Chris* * * *Product Manager, Google App Engine*
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