Temporal Reconfiguration-Based Orchestration Engine in the Cloud Computing

In our days, the cloud computing wins a great importance. So it becomes the refuge of many companies especially Small and Medium sized enterprises (SMEs), since it provides computer services witch fits with demand and charged according to their use. Now the evolution towards the cloud is promoting that orchestration business process to be run as a service (Orchestration as a Service (OaaS)). OaaS represents a solution especially for (SMEs) which needs IT Systems intergration, but cannot install and use such integration platforms because of their maintenance costs and operation. OaaS is a specialization of paradigm Platform as a Service (PaaS). It reduces integration costs by outsourcing the operation and maintenance of an orchestration engine to an OaaS provider. The orchestration engine must be able to maintain its functionalities and performances in case of high demand. It has to be faster and the users have to pay less to run their orchestration processes. In this article, we propose an orchestration engine as a service based on the temporal reconfiguration approach. The proposed approach is based on two main ideas : i) Partition the amount resources of cloud server proportionally between BPEL processes. ii) Applying a temporal partitioning algorithm on a set of BPEL process. Our approach can be executed in a dynamic environment and is scaled with the number of BPEL processes.