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CloudLab is a "meta-cloud"—
The current CloudLab deployment consists of more than 25,000 cores distributed across three sites at the University of Wisconsin, Clemson University, and the University of Utah. CloudLab interoperates with existing testbeds including GENI and Emulab, to take advantage of hardware at dozens of sites around the world.
The control software for CloudLab is open source, and is built on the foundation established for Emulab, GENI, and Apt. Pointers to the details of this control system can be found on CloudLab’s technology page.