Edwin, going back to this: >> The mpirun command is invoked when the user’s group is ‘set group’ to group >> 650. When the rank 0 process creates files, they have group ownership 650. >> But the user’s login group is group 1040. The child processes that get >> started on other nodes run with group 1040, and the files they create have >> group ownership 1040.
What about setting the set-guid flag for the directory? Created files therein will inherit the group from the folder then (which has to be set to the group in question of course). -- Reuti
