State-of-the-Art Architectures for Interoperability of Heterogeneous Clouds

Cloud computing provides convenient access to abstract computational resources over the Internet. In addition to common services like virtual machines, cloud providers are offering own proprietary domain-specific services and frameworks. The absence of common standards and interfaces makes it difficult to connect services of different clouds, migrate between them, or to distribute tasks across various providers. Extensive research in industry and academia has partially addressed the problem of vendor lock-in for cloud migration, however, no solutions are known to enable running applications in a dynamic multi-cloud infrastructure on a permanent basis. This paper describes state-of-the art of cloud infrastructure and considers the combined usage of multiple providers. It analyses approaches of multi-cloud usage that takes advantage of combining platform-specific features of different cloud providers.