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Extending CloudSim to enable support for multi-cloud simulations
Today, cloud based services are an integral part of our everyday lives. We use Dropbox, Google Drive and OneDrive to store files; Google Docs and Office 365 to write documents; Gmail, Yahoo mail and Outlook.com to write emails; and we develop and run our own web services and applications using Google App Engine, Amazon Web Services, Windows Azure Cloud Services – to mention just a few cloud services and cloud service providers. Traditionally, cloud applications are deployed on the infrastructure provided by a single cloud provider, imposing vendor lock-in, challenging application migration, and lack of flexibility. To meet these challenges, multi-clouds and intercloud infrastructures are fast becoming an emerging extension to the current cloud computing ecosystem. In a multi-cloud environment, applications are deployed in such a way that different parts of the application may span multiple public or private clouds simultaneously.