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Erschienen in:
2017 | Supplement | Buchkapitel
Performance Modelling of Transmissions in Very Large Network Topologies
verfasst von : Monika Nycz, Tomasz Nycz, Tadeusz Czachórski
Erschienen in: Distributed Computer and Communication Networks
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Abstract
Transient state queueing models help us to understand better the dynamics of internet transmissions and the performance of traffic control algorithms. Fluid flow approximation, due its simplicity, as it is based on first-order differential equations, is popular and frequently used – but even it, if applied to large topologies, is time and space consuming. Its algorithm is based on iterative calculations on large mutually interdependent structures. In consequence, the bottleneck of the method lies not in numerical computations but in storing and selection of data. This is why we investigate an approach in which a database (SAP HANA) and its language are used to implement the method. The model logic is represented by ETL (Extract, Transform and Load) customizable and user-friendly processes. The numerical examples are based on a real topology having over 100 000 nodes.