1. SARA, LAAS-CNRS, Toulouse, France
2. SARA, Université Toulouse III Paul Sabatier/LAASCNRS, Toulouse, France
3. Department of Computer Science, Internet Initiative Japan Research Laboratory, Tokyo, Japan
4. Department of Software and Information Technology Engineering, ÉTS Montréal, Montréal, QC, Canada
5. Performance and Scale Team, Red Hat, Stockholm, Sweden