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Paper Abstract and Keywords
Presentation 2010-04-15 15:50
Improvement of Equalizing of Performance in Distributed Cooperative System
Shin'ichiro Higashi, Shingo Ata (Osaka City Univ.), Akihiro Nakao (Tokyo Univ./NICT), Ikuo Oka (Osaka City Univ.) NS2010-5
Abstract (in Japanese) (See Japanese page) 
(in English) In recent years, in distributed cooperative systems such as distributed file systems and online games, equalization of performance between collaborative nodes is one of impotant issues as well as explicit performance such as bandwidth, delay and packet loss rate. Selection of the server which can offer equal performance to collaborative nodes is necessary to offer equalized performance. To achieve this problem, we have proposed so far a server selection method that select the server by calculating the circumcenter of collaborative nodes according to
the distance between nodes obtained by performance measures. However, depending on the location of nodes, there is a problem that using circumcenter is not always sufficient to find the most appropriate server. In this paper, we propose a method to improve the accuracy of server selection by solving the problem of using circumcenter by downhill simplex method. We also show probability of selection of the most suitable server can be improved around 55 % compared to the previous proposal.
Keyword (in Japanese) (See Japanese page) 
(in English) Distriubted cooperative system / Server selection / Equalization of performance / Standard deviation / Downhill simplex method / / /  
Reference Info. IEICE Tech. Rep., vol. 110, no. 4, NS2010-5, pp. 21-26, April 2010.
Paper # NS2010-5 
Date of Issue 2010-04-08 (NS) 
ISSN Print edition: ISSN 0913-5685    Online edition: ISSN 2432-6380
Copyright
and
reproduction		 All rights are reserved and no part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopy, recording, or any information storage and retrieval system, without permission in writing from the publisher. Notwithstanding, instructors are permitted to photocopy isolated articles for noncommercial classroom use without fee. (License No.: 10GA0019/12GB0052/13GB0056/17GB0034/18GB0034)
Download PDF NS2010-5

Conference Information
Committee NS  
Conference Date 2010-04-15 - 2010-04-16 
Place (in Japanese) (See Japanese page) 
Place (in English) Kagoshima Univ. 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Traffic Modeling, Network Evaluation, Performance Control, Traffic Engineering 
Paper Information
Registration To NS 
Conference Code 2010-04-NS 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Improvement of Equalizing of Performance in Distributed Cooperative System 
Sub Title (in English)  
Keyword(1) Distriubted cooperative system  
Keyword(2) Server selection  
Keyword(3) Equalization of performance  
Keyword(4) Standard deviation  
Keyword(5) Downhill simplex method  
Keyword(6)  
Keyword(7)  
Keyword(8)  
1st Author's Name Shin'ichiro Higashi  
1st Author's Affiliation Osaka City University (Osaka City Univ.)
2nd Author's Name Shingo Ata  
2nd Author's Affiliation Osaka City University (Osaka City Univ.)
3rd Author's Name Akihiro Nakao  
3rd Author's Affiliation The University of Tokyo/National Institute of Information and Communications Technology (Tokyo Univ./NICT)
4th Author's Name Ikuo Oka  
4th Author's Affiliation Osaka City University (Osaka City Univ.)
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Speaker Author-1 
Date Time 2010-04-15 15:50:00 
Presentation Time 25 minutes 
Registration for NS 
Paper # NS2010-5 
Volume (vol) vol.110 
Number (no) no.4 
Page pp.21-26 
#Pages 6 
Date of Issue 2010-04-08 (NS) 

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