• What's SCASH-MPI?
• Platform
• Install

SCASH-MPI is a software distributed shared memory system using MPI as the communication layer of the SCASH DSM. MPI is the most common communication layer supported by high performance clusters. By using MPI as a communication layer, one can exploit a high-speed network of several clusters with high portability.

Omni/SCASH-MPI is an extension of Omni/SCASH for SCASH-MPI. Omni extensions for Omni/SCASH also can be used on Omni/SCASH-MPI.

• Your must install a MPI library to your cluster. We have tested LAM 7.0.6, 7.1.1 and MPICH 1.2.5 on IA32 and AMD64 Linux based cluster.
• In the current SCASH-MPI, processes in a node can not share a shared memory space. This problem will be removed in the next release.
• In SCASH-MPI, two threads per process run. So we recommend using a dual CPU PC as a node of a cluster.

• Install a MPI library for your cluster.
• Enabling SCASH-MPI feature. Add the option '--enable-scash-mpi' when configure. For example,

          % ./configure --enable-scash-mpi
          % make 
          % make install
  

• The default install process assumes that the MPI library is installed in "/usr". If the MPI library is installed in another directory, you should specifiy the MPI directory as follows:

   
          % ./configure --enable-scash-mpi --with-mpidir=MPI_directory
  

• To compile and link your program, you should use multi-configuration driver ( omcc and omf77 ) with "-omniconfig=scash-mpi" option. For example:

          % omcc -omniconfig=scash-mpi foo.c
  

• Then, run your program by "mpirun". For example,

          % mpirun -np 4 a.out
  

To test your installation, "Omni/tests/scash-test" directory contains some sample programs.