Parallel MPI_File_open failed on NFSv4 but ran on NFSv3

Published: 24/06/2019
Parallel MPI_File_open failed on NFSv4 but ran on NFSv3
Source: SERVERFAULT.COM

When using NFSv4, my client reported that their MPI program sometimes report file cannot open or file not found error. I compiled a sample MPI-IO program and confirmed that, if the MPI procs on computing nodes are trying to access a same file shared from NFS, the program will fail. After several inspection, it turns out that change NFS mount from v4.1 to v3 eliminated this problem. I'd still like

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