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Hello, FYI, the xrootd.tar.gz at the qserv download site is not capable of handling redirection in the face of replication. The symptom of this is that the qserv master cannot find workers to execute for chunks that are replicated on multiple workers. I believe this was encountered when Emmanuel and Fabrice came to visit. I put a fixed version over on AFS: /afs/slac.stanford.edu/g/sds/qserv-misc/xrootd-qsPatch2.tar.bz2 Douglas, when you get a chance, it would be good to place this in the distribution directory. Details: The patched version disables a check in the redirector that prevents writing to a file if multiple copies exist. This was to prevent the possibility of inconsistent replicas and is a good idea when no file invalidation mechanism is available, but is not necessary in qserv, where "files" are used as communication channels. Have a nice day, -Daniel ######################################################################## Use REPLY-ALL to reply to list To unsubscribe from the QSERV-L list, click the following link: https://listserv.slac.stanford.edu/cgi-bin/wa?SUBED1=QSERV-L&A=1