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Hello, I discovered the reason of a problem, we had for a little while. We run machines using xrootd 4.3.0 data servers and a redirector on debian jessie(8.3) for our ALICE SE's (storage elements). All of our data-servers are using a underlying mounted distributed [Lustre](http://lustre.org/), which is why we configured our redirectors/data-manager 's config with: `cms.dfs limit 0 lookup distrib mdhold 0 redirect immed` But unfortunately, the ALICE Monitoring Software ["Monalisa"](https://alimonitor.cern.ch/) still reported a multiple of our storage available(storage_available * number_of_data-servers), even after changes to prevent that from happening in 4.3.0 (like in XrdCmsCluster::Space for example ) So, I dug a little deeper and found out, that Monalisa calls a local "sensor" ( which we cannot change ...), which uses "xrd data-manager:1094 queryspace /" periodically to get storage information. This in turn finally led me to XrdClient/XrdClientAdmin.cc: ``` // Compute an estimation of the available free space in the given cachefs partition // The estimation can be fooled if multiple servers mount the same network storage bool XrdClientAdmin::GetSpaceInfo(const char *logicalname,long long &totspace,long long &totfree,long long &totused,long long &largestchunk) ``` Which is the root of our problem. I might try and code around a bit next week. The best thing would be, if the client could query the redirector's cms daemon, for that "isDfs"-flag and only iterate over all hosts if it is unset. But I actually don't know if and how that can be done (or what problems might occur, if it would be implemented). Which is why I think someone more experienced can do this or at least tell me how it is done. Regards, JK --- You are receiving this because you are subscribed to this thread. Reply to this email directly or view it on GitHub: https://github.com/xrootd/xrootd/issues/375 ######################################################################## Use REPLY-ALL to reply to list To unsubscribe from the XROOTD-DEV list, click the following link: https://listserv.slac.stanford.edu/cgi-bin/wa?SUBED1=XROOTD-DEV&A=1