Glossary

Key Points

Introduction	A virtual machine is an emulation of a computer system that can run within another host system. A hypervisor is a program that creates virtual machines from virtual machine image files and runs them virtually. Virtual machines can be used to run over CMS open data in a very intuitively way. However, they take up a lot of resources, are less efficient than real machines, and harder to use for batch processing.
Hiring a hypervisor	To install VirtualBox in your machine (the host), follow the installation instructions and run them in your device.
Recruiting the labor force	To install the 2011 CMS VM, download the appropriate VM image (version 1.5.3), import it into VirtualBox and launch it.
Test and validate	The CMS VM contains all the required ingredients to start analyzing CMS open data. In order to test and validate the virtual machine you can run a simple CMSSW job.

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