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Abandonware? 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There isn't up-to-date documentation for NFSD's pNFS support. There are various efforts going on to improve it, but as we are swamped with other more pressing issues, there hasn't been good progress. pNFS block is supported, but it's not straightforward to set up. pNFS flexfiles is supported, but the implementation supports only the case where the DS and MDS are the same server. NFSD does not implement the other layout types. -- Chuck Lever