1. CSIRO Information and Communication Technologies (ICT) Centre Information Engineering Laboratory; Computer and Information Technology Building Australian National University; North Road, Acton; ACT; 2601; Australia
2. Cloud Computing and Distributed Systems (CLOUDS) Laboratory; Department of Computer Science and Software Engineering; The University of Melbourne; Australia
3. NSF Center for Autonomic Computing; Department of Electrical and Computer Engineering; Rutgers: The State University of New Jersey; U.S.A.