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Design vs Runtime Models Palladio Days 2013, New York 2013-11-29

Design vs Runtime Models Palladio Days 2013, New York 2013-11-29. André, Catia, Simon, Robert, Eric, Reiner, Qais, Nikolaus, Teerat, Fabian, Ralf. Motivation. Calibration/Extraction of architectural models How to use monitoring data (from Kieker) to parameterize PCM models

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Design vs Runtime Models Palladio Days 2013, New York 2013-11-29

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  1. Design vs Runtime ModelsPalladio Days 2013, New York2013-11-29 André, Catia, Simon, Robert, Eric, Reiner, Qais, Nikolaus, Teerat, Fabian, Ralf BO Group Design vs Runtime

  2. Motivation • Calibration/Extraction of architectural models • How to use monitoring data (from Kieker) to parameterize PCM models • Use monitoring data to characterize parameter distributions in a representative way • Use monitoring data to keep performance model up-to-date • Other QoS properties than performance? • Share existing information in the group BO Group Design vs Runtime

  3. Capabilities of Kieker • Application Level • Tracing • Resources • OS monitors, Utilization • Monitoring virtual resources? • What is the utilization of virtual resources? BO Group Design vs Runtime

  4. Model Extraction • Extract perf model using monitoring data • Extract usage profile • How to know if the extracted model is „good enough“? • Mapping Components to SW artefacts? • Mapping of model entities to monitoring probes? • Ongoing: Instrumentation Language • References: • Extraction: • AndrevH PDays2011, FabianB ASE2011 • Tailored Model Extraction: • AndrevH Diss BO Group Design vs Runtime

  5. Models at Runtime • Using models for runtime analysis (performance, reliability) • Capture dynamic runtime behavior (cloud domain) • Be aware of the reconfiguration options, build the model accordingly • Same abstraction level for design and runtime models? BO Group Design vs Runtime

  6. Design-time vs Runtime abstractions • Differences • Type and amount of data available for model parameterization • Degrees of Freedom • ... • Notion of component instance in PCM? • AssemblyContext not sufficient to identify a component instance • Descartes • Use path of assembly contexts to identify component instances • Flexible service behavior abstractions • Degrees-of-Freedom Model • References: • FabianB SciCo2013, NikoH SoCa 2013 BO Group Design vs Runtime

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