An Evaluation of Distributed Datastores Using the AppScale Cloud Platform

We present new cloud support that employs a single API the Datastore API from Google App Engine (GAE) to interface to different open source distributed database technologies. We employ this support to "plug in" these technologies to the API so that they can be used by web applications and services without modification. The system facilitates an empirical evaluation and comparison of these disparate systems by web software developers, and reduces the barrier to entry for their use by automating their configuration and deployment.