A practical approach to virtualization in HEP P. Buncic, C. Aguado Sánchez, J. Blomer, A. Harutyunyan and M. Mudrinic Eur. Phys. J. Plus, 126 1 (2011) 13 Published online: 31 January 2011 DOI: 10.1140/epjp/i2011-11013-1