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Hi Geonmo, So, I was a bit mistaken. The particular plugin is the oss plugin that the cmsd uses for file lookup. We did have plans to narrow that down but eventually moved it as part of the oss plugin so that it's stat() function could be replaced, see https://xrootd.slac.stanford.edu/doc/dev49/ofs_config.htm#_Toc522916561 For your particular case, use the ofs.osslib directive to tell the cmsd to use the proxy plugin. Here the origin for the proxy would be you dCache head node. I believe you are familiar with this. https://xrootd.slac.stanford.edu/doc/dev49/cms_config.htm#_Toc520504684 As for the dCache nsf mount; indeed, that's the first thing that people complain about. It's not very robust and can't really handle a large number of metadata lookups. I wouldn't be too fast blaming the dCache team for this because very few NFS servers can handle that kind of load. Andy ######################################################################## 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