Hi Wen, To go past 64 data servers you will need to setup one or more supervisors. This does not logically change the current configuration you have. You only need to configure one or more *new* servers (or at least xrootd processes) whose role is supervisor. We'd like them to run in separate machines for reliability purposes, but they could run on the manager node as long as you give each one a unique instance name (i.e., -n option). The front part of the cmsd reference explains how to do this. http://xrootd.slac.stanford.edu/doc/prod/cms_config.htm Andy On Fri, 11 Dec 2009, wen guan wrote: > Hi Andrew, > > Is there any change to configure xrootd with more than 65 > machines? I used the configure below but it doesn't work. Should I > configure some machines' manager to be supvervisor? > > http://wisconsin.cern.ch/~wguan/xrdcluster.cfg > > > Wen >