Managing Service Quality at the Platform and Application Levels with rSLa

Managing service quality in heterogeneous Cloud environments is complex: different providers expose different management interfaces for monitoring and configuration actions that can occur at the infrastructure, platform and application levels. To manage Service Level Agreements (SLAs) in this context, we have developed the rSLA Manager for enabling fast setup of SLA monitoring in dynamic, heterogeneous Cloud environments. In this paper, we demonstrate the use of the rSLA Manager to manage the response time behavior of an image scaling service on the IBM Blue mix platform. We show how the system enables SLA violation reduction by facilitating platform-level adaptation (e.g., adding application instances) and application-level behavior configuration (e.g., changing image scaling quality) based on different service level objectives as well as current application configuration and workload.