nccmp compares two NetCDF files bitwise or with a user defined tolerance (absolute or relative percentage). Some logic is used so it isn't blind like regular cmp. Comparisons are done in local memory without requiring temporary files while linearly traversing the data, so it's as fast as possible. Also, nccmp has been implemented with MPI and built as the command nccmpi to allow for parallel comparisons. Highly recommended for regression testing scientific models.
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