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{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"openMPI 4.1","articleBody":"17/10/2022\r\nKnown problem with openMPI 4.1:\r\nUsing MPI for input and output, the 'internal' MPI data representation gives wrong file size.\r\nFile reading is affected as well (wrong input file read).\r\n\r\nClusters affected by the problem:\r\n-Discoverer. The problem involes the standalone version of openMPI, the one included in the Nvidia hpc-sdk suite is not affected by the problem (Inded, the openMPI version included in hpc-sdk 22.7 should be the 4.0).\r\n\r\n-VSC-5, Same problem as in Discoverer, using openMPI 4.1, the resulting input/output are not read/written correctly.\r\n\r\nFix (to be included in the compile.sh):\r\nUse the 'native' data format insetad of 'internal'.\r\nSuborutines that need to be modified:\r\n-write_output.f90\r\n-read_fields.90\r\n\r\n24/07/2024\r\nProblems solved, all MPI I/O operations are performed in Native mode.","author":{"url":"https://github.com/aroccon","@type":"Person","name":"aroccon"},"datePublished":"2022-10-17T13:18:44.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":0},"url":"https://github.com/23/FLOW36/issues/23"}