If you don't want to use backends, you could use named versions, if Google allowed to configure per version.
https://code.google.com/p/googleappengine/issues/detail?id=6547 -- You received this message because you are subscribed to the Google Groups "Google App Engine" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/google-appengine?hl=en.
