Performance Modelling and Evaluation of E-Business Systems

A general model of an e-business system comprising an application server and a database engine is analyzed and evaluated. Incoming jobs may have to wait in an external queue; when admitted for processing, they compete for the available resources. Database accesses are of different types and are subject to time-outs. An efficient approximate solution is provided; its accuracy is evaluated by comparing the model estimates with those obtained from simulations. The effect of several controllable parameters on the performance of the system is examined in a series of numerical and simulation experiments. © 2006 University of Newcastle upon Tyne. Printed and published by the University of Newcastle upon Tyne, Computing Science, Claremont Tower, Claremont Road, Newcastle upon Tyne, NE1 7RU, England. Bibliographical details FERRARI, G., EZHILCHELVAN, E., MITRANI, I.. Performance Modelling and Evaluation of E-Business Systems [By] G. Ferrari, P. Ezhilchelvan, I. Mitrani. Newcastle upon Tyne: University of Newcastle upon Tyne: Computing Science, 2006. (University of Newcastle upon Tyne, Computing Science, Technical Report Series, No. CS-TR-954) Added entries UNIVERSITY OF NEWCASTLE UPON TYNE Computing Science. Technical Report Series. CS-TR-954 Abstract A general model of an e-business system comprising an application server and a database engine is analyzed and evaluated. Incoming jobs may have to wait in an external queue; when admitted for processing, they compete for the available resources. Database accesses are of different types and are subject to time-outs. An efficient approximate solution is provided; its accuracy is evaluated by comparing the model estimates with those obtained from simulations. The effect of several controllable parameters on the performance of the system is examined in a series of numerical and simulation experiments.A general model of an e-business system comprising an application server and a database engine is analyzed and evaluated. Incoming jobs may have to wait in an external queue; when admitted for processing, they compete for the available resources. Database accesses are of different types and are subject to time-outs. An efficient approximate solution is provided; its accuracy is evaluated by comparing the model estimates with those obtained from simulations. The effect of several controllable parameters on the performance of the system is examined in a series of numerical and simulation experiments. About the author Giovanna joined the Distributed Systems research group in May 2002, as a Research Associate within the TAPAS Trusted and QoS Aware Provision of Application Services Project. She obtained the degree in Computing Science at the University of Bologna in 2001, with a MS thesis on architecting mobile collaboration at the middleware level, developed during an industrial training at the NOKIA Research Center, Helsinki. Paul Devadoss Ezhilchelvan received Ph.D. degree in computer science in 1989 from the University of Newcastle upon Tyne, United Kingdom. He received the Bachelor of Engineering degree in 1981from the University of Madras, India, and the Master of Engineering degree in 1983 from the Indian Institute of Science, Bangalore. He joined the School of Computing Science of the University of Newcastle upon Tyne in 1983 where he is currently a lecturer. Isi Mitrani studied Mathematics at the Universities of Sofia and Moscow (Diploma, 1965), and Operations Research at the Technion, Haifa (MSc, 1967). He joined the University of Newcastle in 1968 as a Programming Advisor, became a Lecturer in 1969 (PhD, 1973), Reader in 1986 and Professor in 1991. He has held several visiting positions, including sabbatical years at INRIA (Le Chesnay) and Bell Laboratories (Murray Hill). His research interests are in the areas of probabilistic modelling, performance evaluation and optimization. Publications include 4 authored books, 3 edited books, more than 100 journal and conference papers and one patent. Suggested keywords APPLICATION SERVERS, QUALITY OF SERVICE, ANALYTICAL MODELLING, QUEUING NETWORKS, SIMULATIONS. Performance Modeling and Evaluation of E-Business Systems Giovanna Ferrari Paul Ezhilchelvan Isi Mitrani School of Computing Science University of Newcastle, NE1 7RU, UK [giovanna.ferrari, paul.ezhilchelvan, isi.mitrani]@ncl.ac.uk Abstract. A general model of an e-business system comprising an application server and a database engine is analyzed and evaluated. Incoming jobs may have to wait in an external queue; when admitted for processing, they compete for the available resources. Database accesses are of different types and are subject to time-outs. An efficient approximate solution is provided; its accuracy is evaluated by comparing the model estimates with those obtained from simulations. The effect of several controllable parameters on the performance of the system is examined in a series of numerical and simulation experiments. A general model of an e-business system comprising an application server and a database engine is analyzed and evaluated. Incoming jobs may have to wait in an external queue; when admitted for processing, they compete for the available resources. Database accesses are of different types and are subject to time-outs. An efficient approximate solution is provided; its accuracy is evaluated by comparing the model estimates with those obtained from simulations. The effect of several controllable parameters on the performance of the system is examined in a series of numerical and simulation experiments.