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CPSC 875

CPSC 875. John D. McGregor C16 - DSMs . Partitioning. http:// money.cnn.com/2011/03/28/autos/vw_jetta_horn_recall/index.htm?hpt=T2 Honking the horn can stop the car Those wires should be logically and physically separated. Partitioning . Architecture tactic

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CPSC 875

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  1. CPSC 875 John D. McGregor C16 - DSMs

  2. Partitioning • http://money.cnn.com/2011/03/28/autos/vw_jetta_horn_recall/index.htm?hpt=T2 • Honking the horn can stop the car • Those wires should be logically and physically separated

  3. Partitioning • Architecture tactic • Divides independent flows of computation • May be a physical separation on different processors • May be a logical separation in different packages • May be both

  4. Pipe and Filter DSM

  5. Fault in pipe and filter • An incorrect dependency

  6. Quantifying modularity • Remember coupling and cohesion • These show up in a DSM as connections

  7. Corrected connection Can think of view->pipe4 as a module that encapsulates that interaction

  8. Looking for patterns Feedbackward Flow forward

  9. DSM Clustering Architecture as represented Architecture as intended

  10. Case Study - BBS • Three-tier layered system • Presentation layer, application layer, database server • Can only communicate with its immediate upper layer

  11. Case Study - CTAS • Model-View-Controller pattern • CTAS model has some parts that are rarely used (relies on a framework architecture) • Not cohesive with other modules that make up a single responsibility • Specify a connection strength to improve clustering

  12. DSM tutorial • DSM tutorial • http://users.ipfw.edu/reddpv01/DSMTutorial.pdf • DSM tool • http://www-edc.eng.cam.ac.uk/cam

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