Mathematical model of functioning distributed infomatione systeme on the basis of three-lewel client server arhitecture .

Abstract

Mathematical model of functioning distributed infomatione systeme on the basis of three-lewel client server arhitecture .

Scoba A.N., Achmed Ayesh Nafea Ayesh

Incoming article date: 27.11.2017

Using a device of close homogeneous exponential queueing networks (QN) a mathematical model of an distributed information system functiouning for solving the problem of getting integral indexis on the basis of local computing network on the basis of three- level client server arhitecture. The base correlation for transitione matrix probabilities constraction and intensitiese of service at the network nodes are given.The peculiarity of the model being worked out is in making a selective choice of information at the database servers and via the channel of communication not the full data base is transmitted but some separate parts of it, which satisfy the conditions of SQL-request search.

Keywords: Distributed information system, distributed data base, local computing system, mass service network, conceptual model, exponential law of distributing the random value, stationary probability, mark process, the global balance equation, system reaction tim