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Another basic question, I have a prototype system running with two dataservers, one redirector and one client machine. The system operates on one name space (/xrd). I can use xrdcp to copy files from the client to the dataservers via the redirector as expected: [client] $ xrdcp /tmp/testfile root://redirector//xrd/testfileNNNN I also see the expected load balancing where the destination dataserver alternates between invocations (when varying NNN). The next test is understanding how our production system can use the namespace. The first issue will be creating subdirectories in the namespace. I need a command line directory creation command (or script). Is it possible to use xrd for this? I didn't see very much documentation for this command. I may also need to allow gridftp to create directories. Is this possible by using a preload library? Can I create a subdirectory via the redirector using the xrd command? This fails on my system, but I can create a directory if I first connect to a dataserver. Is it sane to create multiple instances of a subdirectory on multiple data servers? Will this allow for load balancing? Thanks for any help, Patrick