High Quality Content by WIKIPEDIA articles! AppScale is an open-source framework for running Google App Engine applications. It is an implementation of a cloud computing platform (Platform-as-a-Service), supporting Xen, KVM, Amazon EC2 and Eucalyptus. It has been developed and is maintained by the RACELab at UC Santa Barbara. AppScale allows users to upload multiple App Engine applications to a cloud. It supports multiple distributed backends such as HBase, Hypertable, Cassandra, and MySQL Cluster. Google App Engine is a platform for developing and hosting web applications in Google-managed data centers. It was first released as a beta version in April 2008. Google App Engine is cloud computing technology. It virtualizes applications across multiple servers and data centers. Other "cloud"-based platforms include offerings such as Amazon Web Services and Microsoft's Azure Services Platform. AppEngine differs from services like Amazon Web Services, though, in that AWS is IaaS while AppEngine is PaaS.

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