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Stepwise Development of Streaming Software Architectures

We present a Model Driven Engineering approach to explain, verify, build, and test dataflow or streaming software architectures that are parallelized for performance or availability. Component-connector models are incrementally elaborated by transformations that refine or optimize architectural designs. We re-engineered two significant case studies to illustrate the generality of our work: (1) recoverable crash fault tolerant servers and (2) join parallelizations in database machines.