Adaptive SLA enforcement for SOA Applications Using a Middleware

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Prof. P. Karthikeyan
Moorthy, S.Senthil Ganesh


Service Level Agreement becomes the prevailing business model for specifying the QoS requirements of the web services in a
complex service based environments. Such QoS requirements include service availability, service efficiency, service throughput, etc.., The
Service Level Agreement for the web services are difficult to maintain since the usage of the service varies widely over time. We present a
middleware architecture which dynamically allocates the clustered resources to the services. The middleware generates the SLA document on
the fly based on the popularity of services deployed in the cluster. This feature of adaptive SLA generation is not done in any application server.
Thus our middleware architecture eliminates the need for the service provider to manually provide the Service Level Agreement to the
Application Service Provider (which needs to be replaced often). This paper discusses the middleware architecture, its implementation and
sample scenario which illustrates the usage of the middleware in the real case.


Keywords: Service Level Agreement (SLA), Service Oriented Architecture (SOA), Middleware, Quality of Service (QoS), Application Service
Provider (ASP).


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