[parallel-netcdf] #42: MPI-agnostic "ncmpidiff" tool?

[Carl Ponder]

On 6/12/19 5:08 PM, Wei-keng Liao wrote:
> cdfdiff and ncmpidiff were designed to be more like unix command “diff”.
> It reports whether the 2 NetCDF files are different and the “locations”
> of differences.
>
> NCO’s ncbo does calculate the element-wise differences and
> other statistics values, and save them to a new file.
>
> I believe cprnc is similar, but reports the differences to stdout.
>
> One advantage of cdfdiff is it does not need PnetCDF or NetCDF
> library to compile or run.
>
> FYI. I updated cdfdiff to report the array indices of first
> array element that is found different. Here is an example output.
>
>    cdfdiff tst_rec.nc1 tst_rec.nc2 ----
>    DIFF: file format (CDF-1) != (CDF-2)
>    DIFF: variable "rec_var" of type "NC_FLOAT" at element [1, 1]
>    DIFF: variable "fix_var" of type "NC_FLOAT" at element [1, 2]
>    Number of differences in header: 1
>    Number of differences in variables: 2
>
> Command line option -b is for verbose mode, which also reports
> what objects are the same.
Wei-Keng -- do all these tools work ok with the PNetCDF output-files?
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