I have a code that calls the the Direct Sparse Solver for Clusters Interface.I have an error when I run it using the option for the MPI based nested dissection. Documentation can be found here: https://software.intel.com/en-us/mkl-developer-reference-c-cluster-sparse-solver-iparm-parameter
When i have I param[39] set to 3 everything works fine.
When I set it to 10, I get no errors, no warnings, no output when msglvl is set to one. I assume this is because the system is crashing really hard.
I am using the 64-bit interface of the solver and not using the MPI-based dissection is not an option (my matrix has 50 billion non-zero elements and is 12 billion by 12 billion). I am using the Latest version of the MKL cluster library.
I just spent two weeks modifying the code to remove overlaps in the matrix elements to use this feature.
What Is going wrong?