|Chapter title||Service operation impedance and its role in projecting some key features in service contracts|
|Authors||Kargupta, S. and Black, S.E.|
This paper introduces the notion of implicit Operation Impedance (I)
and Operation Potential (V) in Service Provider-Consumer contracts. ‘I’ is the
runtime composite resultant of all the activity delays of the components
supporting the Service Operation. This work establishes that ‘I’, which impacts
the overall Operation Performance (P), is influenced by the underlying
application components’ activities in distinct patterns. A high-level runtime
abstract model is empirically deduced between ‘I’, ‘V’ and ‘P’ by applying
established mathematical techniques. Model based indicative values of some
features are computed against variability of the operation’s components.
Lookup datasets against different system configurations are created to associate these computed values to the actual empirical values of other features.
Established mathematical techniques applied with appropriate regression types
to enable trend extrapolation/interpolation. The datasets/patterns affirmed
effectiveness of the ‘I’ based model as a means of decoupled, bidirectional i.e. top-down and bottom-up impact assessment of modifications to the operation’s
underlying application components on ‘P’ (‘V’ constant) or ‘V’ (‘P’ constant)
without repetitive full scale external performance/benchmark testing. This also
enables fine tuning of application components to retrofit prescribed Quality of
Service (QoS). The paper briefly mentions a Matrix Transpose/Inverse
technique for future assessment of multiple component changes simultaneously.
|Book title||ICWE 2009 Doctoral Consortium : proceedings of the Doctoral Consortium of the International Conference on Web Engineering, in conjunction with ICWE'2009, San Sebastian, Spain, June 22, 2009|
|Series||CEUR workshop proceedings|
|Web address (URL)||http://sunsite.informatik.rwth-aachen.de/Publications/CEUR-WS/Vol-484/paper4.pdf|