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Towards Concurrent SLA-based Management in a Composite Service Data Centre

Lookup NU author(s): Dr James Smith, Professor Paul WatsonORCiD



The ongoing aim behind the work described here is to investigate support for a data centre type environment where an application can be implemented as a composition of components, or workflow. For instance, an application might reuse established components. As is typical in data centre operation, hosting of an application is governed by a Service Level Agreement (SLA) between provider and application owner. Such an SLA describes levels of service and corresponding charges (paid to the provider) and refunds (paid by the provider). The infrastructure can of course vary mapping of hosted applications to machine resources in seeking to meet SLAs efficiently. However, it is also possible to dynamically vary the mapping of composite application to components; for instance to switch between alternate implementations of some particular component. The suggestion is that the availability of alternative components, or even compositions, will arise naturally in a shared repository, and that the presence of the extra degree of control can make the application hosting more resilient. While previous work by the authors has demonstrated basic mechanisms towards a composite service data centre, the current work begins to combine such mechanisms towards the control of both resource and component mapping in the context of concurrent workloads. The paper describes experimental work using a prototype implementation of an adaptive workflow engine.

Publication metadata

Author(s): Smith J, Watson P

Publication type: Report

Publication status: Published

Series Title: School of Computing Science Technical Report Series

Year: 2008

Pages: 7

Print publication date: 01/04/2008

Source Publication Date: April 2008

Report Number: 1088

Institution: School of Computing Science, University of Newcastle upon Tyne

Place Published: Newcastle upon Tyne