Sensitivity Analysis in Optimal Design for Distributed File Allocation Systems

Akiko NAKANIWA  Masaki ONISHI  Hiroyuki EBARA  Hiromi OKADA  

Publication
IEICE TRANSACTIONS on Communications   Vol.E84-B   No.6   pp.1655-1663
Publication Date: 2001/06/01
Online ISSN: 
DOI: 
Print ISSN: 0916-8516
Type of Manuscript: PAPER
Category: Software Platform
Keyword: 
distributed processing,  distributed database system,  file allocation,  sensitivity analysis,  multimedia information network,  

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Summary: 
In distributed network systems, it is one of the most important problems how to assign the files to servers in view of cost and delay. It is obvious that there is a trading-off relationship between costs and delays in these systems. In order to evaluate the optimization that the total cost is minimized subject to the total delay, we have presented the Optimal File Allocation Model as 0-1 integer programming, and have investigated the general characteristics in distributed systems. In this model, we have introduced many cost and delay parameters to evaluate the total cost and delay in the system more exactly. In constructing practical systems, it is necessary to investigate the weight and the contribution of each parameter to the total cost. It is very useful to show how to estimate cost and delay parameters on the basis of this analysis. In this paper, we analyze the sensitivity of these parameters and make clear the influence between principal parameters.