Hi All, Andreas Landhaeusser has kindly sent over some further information following his presentation at the last User Group meeting, details are below: Measuring the storage performance, http://www.storageconference.org/2011/Papers/Research/1.Carns.pdf ANL developed Darshan for characterization and improving I/O performance of workloads http://www.mcs.anl.gov/research/projects/darshan/ Thanks, Claire GPFS User Group Secretary