Follow-up Comment #3, sr #124729 (project xrootd): The combination (ip4_addr, start_time, port) is unique. Port, in some sense, it equivalent to instance name. That is reported in the summary info. Though, of course, it not easy to correlate with the detailed stream at this level. So, you can use what you are using and only convince yourself that it is sufficient to differentiate servers and two intances cannot have the same port number. _______________________________________________________ Reply to this item at: <http://savannah.cern.ch/support/?124729> _______________________________________________ Message sent via/by LCG Savannah http://savannah.cern.ch/