A framework for IaaS-to-SaaS monitoring of BPEL processes in the Cloud: Design and evaluation

Cloud computing is increasingly being used to deliver infrastructure, platform and/or software as services over the Internet. The resulting Cloud-based services with various types create complex management situations at the Cloud provider side. In particular, face to a large and dynamic number of service loads, a Cloud provider needs a means to maintain QoS (Quality of Service) levels it has agreed-upon with its customers. To properly operate and manage such complex situations, an effective and efficient monitoring is necessary. Most of the monitoring propositions are for the infrastructure and platform layers. This paper presents a multi tenant framework for QoS Monitoring and Detection of SLA Violations (QMoDeSV) for composite services implemented as BPEL (Business Process Execution Language) processes and deployed in a Cloud environment. It presents the complete design of QMoDeSV and a preliminary experimental evaluation of its performance.