Displaying similar documents to “A Content-based Dynamic Load-Balancing Algorithm for Heterogeneous Web Server Cluster”

Transparent Scheduling of Composite Web Services

Dyachuk, Dmytro, Deters, Ralph (2007)

Serdica Journal of Computing

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Composite Web Services (CWS) aggregate multiple Web Services in one logical unit to accomplish a complex task (e.g. business process). This aggregation is achieved by defining a workflow that orchestrates the underlying Web Services in a manner consistent with the desired functionality. Since CWS can aggregate atomic and other CWS they foster the development of service layers and reuse of already existing functionality. An important issue in the deployment of services is their run-time...

Sensitivity examination of the simulation result of discrete event dynamic systems with perturbation analysis.

Tamas Koltai, Juan Carlos Larrañeta, Luis Onieva, Sebastián Lozano (1994)

Qüestiió

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Simulation completed with perturbation analysis provides a new approach for the optimal control of queuing network type systems. The objective of this paper is to calculate the sensitivity range of finite zero-order perturbation, that is, to determine the maximum and minimum size of perturbation within which zero-order propagation rules can be applied. By the introduction of the concept of virtual queue and first and second level no-input and full-output matrices, an algorithm is provided...

A RED modified weighted moving average for soft real-time application

Joanna Domańska, Adam Domański, Dariusz R. Augustyn, Jerzy Klamka (2014)

International Journal of Applied Mathematics and Computer Science

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The popularity of TCP/IP has resulted in an increase in usage of best-effort networks for real-time communication. Much effort has been spent to ensure quality of service for soft real-time traffic over IP networks. The Internet Engineering Task Force has proposed some architecture components, such as Active Queue Management (AQM). The paper investigates the influence of the weighted moving average on packet waiting time reduction for an AQM mechanism: the RED algorithm. The proposed...

Resilient critical infrastructure management with a service oriented architecture: A test case using airport collaborative decision making

Martin Hall-May, Mike Surridge, Roman Nossal-Tüyeni (2011)

International Journal of Applied Mathematics and Computer Science

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The SERSCIS approach aims to support the use of interconnected systems of services in Critical Infrastructure (CI) applications. The problem of system interconnectedness is aptly demonstrated by ‘Airport Collaborative Decision Making' (A-CDM). Failure or underperformance of any of the interlinked ICT systems may compromise the ability of airports to plan their use of resources to sustain high levels of air traffic, or to provide accurate aircraft movement forecasts to the wider European...

Study of Queuing Systems with a Generalized Departure Process

Mirtchev, Seferin, Statev, Stanimir (2008)

Serdica Journal of Computing

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This work was supported by the Bulgarian National Science Fund under grant BY-TH-105/2005. This paper deals with a full accessibility loss system and a single server delay system with a Poisson arrival process and state dependent exponentially distributed service time. We use the generalized service flow with nonlinear state dependence mean service time. The idea is based on the analytical continuation of the Binomial distribution and the classic M/M/n/0 and M/M/1/k system....