MonSLAR: a middleware for monitoring SLA for RESTFUL services in cloud computing

Abstract

Measuring the quality of cloud computing provision from the client�s point of view is important in order to ensure that the service conforms to the level specified in the service level agreement (SLA). With a view to avoid SLA violation, the main parameters should be determined in the agreement and then used to evaluate the fulfillment of the SLA terms at the client's side. Current studies in cloud monitoring only handle monitoring the provider resources with little or no consideration to the client�s side. This paper presents MonSLAR, a User-centric middleware for Monitoring SLA for Restful services in SaaS cloud computing environments. MonSLAR uses a distributed architecture that allows SLA parameters and the monitored data to be embedded in the requests and responses of the REST protocol.