Performance Evaluation of Computer and Communication Systems. Milestones and Future Challenges : IFIP WG 6.3/7.3 International Workshop, PERFORM 2010, in Honor of Günter Haring on the Occasion of His Emeritus Celebration, Vienna, Austria, October 14-16, 2010, Revised Selected Papers - Karin Anna Hummel, Helmut Hlavacs, Wilfried Gansterer ((Lecture Notes in Computer Science))