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Hi Samuel, re: > Do I have to have a pqact entry for GEM data if I only want to relay > it thru LDM to another machine? Nope. The design of the LDM is such that it can be: - source of data - data relay - data receiver - any combination of the above The toplevel IDD relay node that we operate, idd.unidata.ucar.edu, has no invocations of pqact running on any of the cluster nodes that provide data relay service. > We're pretty strapped for space/disk I/O on SHU. Understood. By the way, this is really an LDM question, so it would have been better to send as an inquiry to address@hidden. Cheers, Tom **************************************************************************** Unidata User Support UCAR Unidata Program (303) 497-8642 P.O. Box 3000 address@hidden Boulder, CO 80307 ---------------------------------------------------------------------------- Unidata HomePage http://www.unidata.ucar.edu **************************************************************************** Ticket Details =================== Ticket ID: QYV-528693 Department: Support GEMPAK Priority: Normal Status: Closed