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DATA DISTRIBUTION

We want a data decomposition scheme that:

• is practical,
• is general-purpose,
• gives good load balance,
• can reproduce all the most commonly-used data distributions.
  Block-Cyclic Distribution

• Partition matrix into blocks of elements.

• Can regard processors as being arranged as a 2-D mesh, or template.
  • Can be shown to scale whereas a 1D mesh does not.

Right-Looking Block LU Factorization