Once an App Engine feature has been officially deprecated, the feature continues to be available for at least the period of time defined in the terms of service. After this period of time, the feature or service will be scheduled for removal (turndown).
The following table lists current App Engine feature deprecations and the related turndown schedules.
| Feature | Deprecated | Turndown Date | Behavior after turndown date |
|---|---|---|---|
| Backend API | March 13, 2014 | TBD | |
| Google Storage API (also called the Files API) | June 12, 2013 | TBD | |
| Master/Slave Datastore | April 4, 2012 | July 6, 2015 | See the service turndown doc. |
| Python 2.5 | March 8, 2013 | TBD |