What other nosql databases are compatible (more or less) with the Google Appe Engine datastore.
Alternatively, this is a good level of abstraction / solution (free) that abstracts between several database implementations, including the Google engine and my db access application.
I would like to develop an application for GAE, but later deploy it to my own server, but I do not want to rewrite the db code.
Important update: the application is developed in Java , so ideally the data abstraction layer or any alternatives should be “Java compatible”.
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