Programming model for Cluster with dual-cored nodes

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Programming model for Cluster with dual-cored nodes

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Hello,

I'm interesting in parallelization of Fortran program for cluster. Cluster consists of 4 nodes with dual cores each one. What is optimal way to parallelize program for this kind of cluster? For dual cores I had to use OpenMP, for cluster as is -- MPI. What about Cluster OpenMP? Advantages/Disadvantages... Scalability for using on another clusters, and may be grids...

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