Replicating Web Services for Scalability

Bravetti, Mario; Gilmore, Stephen; Guidi, Claudio; Tribastone, Mirco

doi:10.1007/978-3-540-78663-4_15

Cited by 25 publications

(21 citation statements)

References 16 publications

(24 reference statements)

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“…In this chapter we 1. Introduce business process model and notation, its aim and a brief overview of the developments till now.…”

Section: Business Process Model and Notationmentioning

confidence: 99%

“…5. 1. We see that the task tries to book a room in "n" hotels until it has successfully booked one of the hotels or there are no free rooms for the entered dates in all the n hotels.…”

Section: Example: Hotel Booking Process With Costsmentioning

confidence: 99%

“…Every business process when executed incurs a certain amount of cost and 3. 1. COST performs at certain reliability.…”

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confidence: 99%

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Computing the Cost of Business Processes

Sampath

Wirsing

2009

Lecture Notes in Business Information Processing

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Designing and optimizing a business process based on its financial parameters is a challenging task. It requires well defined approaches, actions and recommendations which when implemented lead to tangible and quantifiable results. The resulting business process has to minimize the expenses for the business actors and maintain the estimated profitability.In recent years, after service oriented architecture and business processes have taken center stage, a lot of research has been done to establish methodologies which evaluate and optimize business process implementation. New fields of research have come up forefront which makes implementation of business processes feasible and profitable for organizations. These establish a management perspective to the implementation of a service, stressing upon financial and economic factors such as returns, the cost of implementing a service or making sure that there is reliability in the service being offered. Existing frameworks recommend best practices which optimize business process by considering them with surrounding soft factors such as behavioral aspects of involved human resources and accordingly evaluate the success (or failure) of the process. Nevertheless computing the cost of a business process such that it is a tangible and measurable value continues to be a complicated and cumbersome process. Estimating the profitability of an idea before it is implemented is a difficult task and the need for techniques which allow us to do this as early as possible play a very important role in decision making. This requires business process design approaches and practices that incorporate techniques for tangible evaluation of expenses and benefits for each implementation.In this work we propose a new methodology by which the cost of a business process is calculated by considering the cost and reliability of each action or task in the process. The methodology breaks the business process, represented using 'Business process model and notation (BPMN)', into repetitive patterns and a cost and reliability factor for each of these patterns is calculated. As a result the overall cost, reliability and the cost incurred to achieve one successful execution of the business process, the business cost of the process, is achieved. Based on this concept we propose an extension of financial and economic parameters to theoretical foundations representing service invocation and execution of long running transactions. We use Sagas as basis for this extension. Long running transactions are Sagas when they can be broken down as sequence of transactions which interleave with other transactions. We have implemented the new methodology to examine individual business processes with the help of sensitivity analysis so as to find problem areas where an optimization can be implemented. Using this methodology the study evaluates different existing frameworks and well-known best practices and their financial impact on the processes. The study is backed by an application (Java based) which automate...

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“…In this chapter we 1. Introduce business process model and notation, its aim and a brief overview of the developments till now.…”

Section: Business Process Model and Notationmentioning

confidence: 99%

“…5. 1. We see that the task tries to book a room in "n" hotels until it has successfully booked one of the hotels or there are no free rooms for the entered dates in all the n hotels.…”

Section: Example: Hotel Booking Process With Costsmentioning

confidence: 99%

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Computing the Cost of Business Processes

Sampath

Wirsing

2009

Lecture Notes in Business Information Processing

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“…In this paper a largescale model of the BitTorrent distribution protocol is developed in PEPA and solved using the fluid-flow approximation. Previous models of Web Services considered in this style include the distributed e-learning and course management system considered in [33] in PEPA and the same system considered in the untimed process calculus SOCK and in PEPA in [34].…”

Section: Related Workmentioning

confidence: 99%

Quantitative Analysis of Web Services Using SRMC

Clark

Gilmore

Tribastone

2009

Formal Methods for Web Services

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Abstract. In this tutorial paper we present quantitative methods for analysing Web Services with the goal of understanding how they will perform under increased demand, or when asked to serve a larger pool of service subscribers. We use a process calculus called SRMC to model the service. We apply efficient analysis techniques to numerically evaluate our model. The process calculus and the numerical analysis are supported by a set of software tools which relieve the modeller of the burden of generating and evaluating a large family of related models. The methods are illustrated on a classical example of Web Service usage in a businessto-business scenario.

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“…In [2] we considered the problem of how service-level agreements can be evaluated for service-oriented systems at all. In [11,12] we considered the scalability of such a system in the absence of possible modifications as generated through model transformation.…”

Section: Related Workmentioning

confidence: 99%