On 10/04/2014 08:57 PM, Jaln wrote:

I have a modified ROMIO library,

Hello! I would love to hear more about the modifications you are exploring in ROMIO.

but I have to compile the code using NERSC Hopper's default MPI compiler, is there any way to let the collective I/O code run with my modified ROMIO library. (and of course compile using their default mpicc)

ROMIO can be built as a standalone library. If you link it on top of your mpi program, it will override the existing MPI-IO calls.

I try to compile my own mpicc and run on that cluster, but seems, the hopper cluster has specific optimized cray-mpi compiler and wont let my code compiled or executed correctly on compute nodes.

I'm sure it's possible to do whatever the cray-mpi compiler is doing, but Wei-keng Liao at Northwestern has done the standalone external library approach on past cray machines -- including Hopper, I think. ==rob -- Rob Latham Mathematics and Computer Science Division Argonne National Lab, IL USA _______________________________________________ discuss mailing list [email protected] To manage subscription options or unsubscribe: https://lists.mpich.org/mailman/listinfo/discuss