Adaptivity metric and performance for restart strategies in web services reliable messaging

Adaptivity, the ability of a system to adapt itself to its environment, is a key property of autonomous systems. In his paper we propose a benefit-based framework for the efinition of metrics to measure adaptivity. We demonstrate the application of the framework in a case study of the adaptivity of restart strategies for Web Services Reliable Messaging (WSRM). Using the framework, we define two adaptivity metrics for a fault-injection-driven evaluation of the adaptivity of three restart strategies in aWSRM implementation. The adaptivity measurements are complemented by a thorough discussion of the performance of the restart strategies.