Browsing by Subject "system komponentowy"

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Access status: Open Access ,
Adaptive deployment of component-based applications in distributed systems
(2007-10-17) (Data obrony: 2010) Cała, Jacek
Wydział Elektrotechniki, Automatyki, Informatyki i Elektroniki
Deployment of distributed applications in heterogeneous environments is an interesting yet complex area in the software life cycle. A proper deployment infrastructure can alleviate many issues related to software execution and management. It also promotes the component-based design and enables creating dynamic and adaptive systems. By applying adaptation to the deployment process, a system can react to context changes and reorganise its components to improve execution. This work presents design, implementation and evaluation of the Adaptive Deployment Framework that aims at enhancing application performance. The pivotal role in adaptive deployment plays the model-based approach to deployment. It improves reusability and enables automation. However, many of the existing model-based solutions are limited to the spatial distribution of components only. Therefore, we extended the notion of deployment and defined three basic deployment dimensions: spatial, temporal and semantic. The key enablers of adaptive deployment are reconfiguration mechanisms that influence the way in which the system will be adapted. We discerned four redeployment techniques: full, deep, shallow, and runtime. In this work we concentrate on the last technique supported by component migration. The design, implementation and integration of the migration mechanism with the deployment infrastructure have shown that it is well suited as a reconfiguration tool. To demonstrate how it can improve application performance, we designed and implemented the Force-Directed Deployment Planning algorithm, a novel approach to deployment planning.