WRF Hierarchical Software Architecture

• Top-level “Driver” layer

  • Isolates computer architecture concerns
  • Manages execution over multiple nested domains
  • Provides top level control over parallelism
    • patch-decomposition
    • inter-processor communication
    • shared-memory parallelism
  • Controls Input/Output

• “Mediation” Layer

  • Specific calls to parallel mechanisms

• Low-Level “Model” layer

  • Performs actual model computations
  • Tile-callable
  • Scientists insulated from parallelism
  • General, fully reusable

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Driver Layer

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