Trigger correlation for dynamic system reconfiguration
Mahin Abbasipour, Ferhat Khendek, Maria Toeroe · 2018
Service Providers1 aim at optimizing resource utilisation while respecting the Service Level Agreements (SLAs) entered with customers. Dynamic reconfiguration is a mechanism for rearranging, allocating and deallocating resources as workload varies. Rearranging, adding or deallocating resources are performed by actions according to elasticity rules triggered by certain conditional events, like threshold violations, called triggers. At runtime, more than one trigger may be generated at a time. Handling them independently may jeopardize certain properties such as availability; moreover, it may harm the stability of the system. In this paper we propose a model based approach for runtime correlation of triggers and the execution of their related elasticity rule actions. This approach is part of an overall framework for SLA compliance management and dynamic reconfiguration.