CloudSim is a framework for modeling and simulation of cloud computing infrastructures and services.
[1] Originally built primarily at the Cloud Computing and Distributed Systems (CLOUDS) Laboratory,[2] the University of Melbourne, Australia, CloudSim has become one of the most popular open source[citation needed] cloud simulators in the research and academia.
CloudSim is completely written in Java.
The latest version of CloudSim is CloudSim v6.0.0-beta on GitHub.
[3] Cloudsim is suitable for implemeting simulations scenarios based on Infrastructure as a service as well as with latest version Platform as a service, so get started here Initially developed as a stand-alone cloud simulator, CloudSim has further been extended by independent researchers.