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Hi Yannick, 1) Your configuration file has to allow reading the file from where it was placed, 2) The owner has to be the same the user running xrootd (or at least the file has to be readable by that user), and 3) If you use an authorization scheme (I don't think you use the xrootd scheme), privileges have to be correct. I hope this helps. However, I do want to point out that if you adopt a single file scheme your results will not be valid and likely not even comparable from protocol to protocol. This is because the file system will happily cache some portion of the file, and you really don't know which portion it might be. While reading files of several hundred gigabytes minimizes this problem it doesn't eliminate it, especially with the way some protocol implementations handle the file. Andy -----Original Message----- From: Yannick Patois Sent: Thursday, October 03, 2013 7:51 AM To: [log in to unmask] Subject: Direct access to disk files through xrootd Hi, I'm currently running a DPM head-server (1.8.6) with xrootd plugin and several disk-servers serving files with Xrootd and others (gsiftp and rfio). We want to make some performance tests using our available protocols (because we have the impression that none of them currently deliver all what we can expect from hardware and want to quantify this). It's rather easy to put some file on some specific volume of some specific disk and read it through gstiftp or rfio: globus-url-copy gsiftp:/disk_server.tld/path/to/file local_file rfcp disk_server.tld:/path/to/file local_file But I couldn't find a way to do it with xrootd. All my attempts ends-up with "Permission denied". Is there a way to do this? Thanks, Yannick -- Yannick Patois <[log in to unmask]> IPHC - IN2P3 / CNRS - 23 rue du Loess 67037 Strasbourg Tel: 03 88 10 61 83 ######################################################################## Use REPLY-ALL to reply to list To unsubscribe from the XROOTD-L list, click the following link: https://listserv.slac.stanford.edu/cgi-bin/wa?SUBED1=XROOTD-L&A=1 ######################################################################## Use REPLY-ALL to reply to list To unsubscribe from the XROOTD-L list, click the following link: https://listserv.slac.stanford.edu/cgi-bin/wa?SUBED1=XROOTD-L&A=1