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Concurrent Management of Composite Services According to Response Time SLAs

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 monetary charges paid to and or by the provider. A wrapper has been built around an existing workflow engine (ActiveBpel) to support investigation of such a facility. Previous work has illustrated how a range of control loops can be implemented in this wrapper. The work described here focusses on the implementation and evaluation in this wrapper architecture of a policy which determines machine allocation and admission queue size for a collection of applications, seeking to maximize provider profit, particularly during overload conditions.

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: 18

Print publication date: 01/10/2008

Source Publication Date: October 2008

Report Number: 1126

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

Place Published: Newcastle upon Tyne