I am using Scalapack for diagonalizing matrices (25k × 25k) and need the eigenvectors. I am using pzlawrite to write out the distributed matrices to a file. But the speed of writing is quite slow in ASCII for such huge files. I suppose writing the output to a binary file would be much faster, but I am unable to get any examples for writing distributed matrices to a binary file in Fortran. Are there any inbuilt functions in scalapack to write out the distributed matrices in binary?
Writing a block-cyclic distributed matrix to a binary file
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