ECSA 2025
Mon 15 - Fri 19 September 2025 Limassol, Cyprus

Context: Self-adaptive systems in the cloud domain leverage dynamic adaptations to meet their service level objectives (SLOs) under changing environments, e.g., varying load or VM failures. This can be realized by defining scaling policies (adaptations) that reactively trigger when SLOs are violated. An alternative way to achieve this is for the system to predict the impact of adaptations as well as future environmental changes, thus enabling proactive reconfigurations. Furthermore, to achieve the desired behavior, fitting SLOs and adaptions have to be chosen. This paper introduces a framework that leverages model-based analysis to optimize reconfiguration plans proactively. It aids developers in constructing proactive reconfigurations at design time. Objective: This paper introduces a framework that leverages model-based analysis to optimize reconfiguration plans proactively. It aids developers in constructing proactive reconfigurations at design time. Method: This paper presents a state exploration-based methodology for optimizing reconfiguration plans to maximize system utility with respect to predefined SLOs that outperforms a purely reactive approach. We use the Palladio Component Models (PCM) to simulate the self-adaptive system using Slingshot, generating a state graph where transitions represent different adaptation rules or environment changes. For each state, we calculate a utility value that reflects how well the state satisfies the SLOs. The optimal reconfiguration plan is identified by finding the path from the root node to any leaf node that maximizes cumulative utility. Results: We show the effectiveness of our approach on a simple exemplary system where the state exploration allows the system to find a reconfiguration plan that outperforms a purely reactive approach. Conclusion: Our approach is a promising method for optimizing reconfiguration behavior in self-adaptive cloud systems. By using state exploration, we can find the optimal reconfiguration plan that maximizes system utility with respect to predefined SLOs. This approach outperforms a purely reactive approach, showing the potential of our methodology.

Wed 17 Sep

Displayed time zone: Athens change

16:00 - 17:45
Session 3 - Self-Adaptive, Secure and Federated Learning SystemsResearch Papers / Journal First at Phoenix
Chair(s): Dalila Tamzalit Nantes Université
16:00
30m
Full-paper
Model-based Proactive Self-Adaptation for Cloud SystemsResearch Track Paper
Research Papers
Raphael Straub Ulm University, Sarah Sophie Stieß University of Stuttgart, Germany, Steffen Becker University of Stuttgart, Matthias Tichy Ulm University
16:30
30m
Full-paper
SAFER-D: A Self-Adaptive Security Framework for Distributed Computing ArchitecturesResearch Track Paper
Research Papers
Marco Stadler Johannes Kepler University Linz, Michael Vierhauser University of Innsbruck, Michael Riegler Johannes Kepler University Linz, Daniel Waghubinger Johannes Kepler University Linz, Johannes Sametinger Johannes Kepler University Linz
Link to publication DOI Pre-print File Attached
17:00
30m
Full-paper
Architecting Federated Learning Systems: A Requirement-Driven ApproachResearch Track Paper
Research Papers
Luciano Baresi Politecnico di Milano, Livia Lestingi DEIB, Politecnico di Milano, Iyad Wehbe Politecnico di Milano
17:30
15m
Short-paper
Smart Ecosystems and Digital Twins: An Architectural Perspective and a FIWARE-Based SolutionJournal First Paper
Journal First
Franca Rocco di Torrepadula University of Naples Federico II, Alessandra Somma University of Naples Federico II, Alessandra De Benedictis University of Naples Federico II, Nicola Mazzocca University of Naples Federico II