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how to split matrix in cluster_sparse_solver, similar number of rows or similar number of nonzero elements

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Hi:

   I need to use cluster_sparse_solver to solve a larger complex symmetric matrix. So I need to split matrix into two parts and put them into two different compute nodes respectively. The first part is from row 1 to row n, the second part is from row n to the last row. Since the selection of row n is arbitrary, which selection will give the best performance, tow compute nodes have similar number of rows or similar number of nonzero elements?


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