Laboratorio di Calcolo e Multimedia, Università degli Studi di Milano, Italy
In the laboratory we have a 31-nodes cluster, built with Debian, all of them in diskless root, 17 HPC (4 of them in an InfiniBand network) and one CUDA workstation. We're using Condor in the main cluster, and Torque and Maui in the HPC cluster, which is dedicated to the simulation of our Theoretical Physics Department.
The choice of Debian is due to its stability, security and its simplicity. Also we like Debian for the vast choice of packages and support that one can need.