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Paper Abstract and Keywords
Presentation 2016-06-10 09:25
Evaluation of Number of Data Replicas for Urban-area Distributed Storage System Using Hazard Map Information
Takaki Nakamura (Tohoku Univ.), Satoshi Munakata, Kunio Saito, Jyunko Miyazaki (HSEJ), Shinya Matsumoto, Hitoshi Kamei (Hitachi), Hiroaki Muraoka (Tohoku Univ.) MR2016-8
Abstract (in Japanese) (See Japanese page) 
(in English) We have proposed the urban-area distributed storage system and the risk-aware data replication to sustain information services in areas affected by a wide-spread disaster. The risk-aware data replication decides a safe backup server for a primary server using integer programming problem based on the damage risk between both the primary server and the backup server. As the number of data replicas increases, the problem size grows and the cost for storages to store replicas increases. Therefore, it remains challenges to decide an appropriate backup server in a short computation time and reduce the cost. In this paper, we propose the method that decides a backup server iteratively based on the average number of replicas specified by system administrators. We set a disaster model based on a hazard map information provided by J-SHIS, then we evaluate survived data ratios after a simulated disaster. We confirmed 94% survived data as the expected value when half the number of 24 servers with 1.5 replicas on average are damaged. We conclude that 1.5 replicas on average is appropriate to meet our target of over 90% survived data.
Keyword (in Japanese) (See Japanese page) 
(in English) Availability / Wide-area Disaster / Risk-aware Data Replication / Urban-area Distributed Storage System / J-SHIS / / /  
Reference Info. IEICE Tech. Rep., vol. 116, June 2016.
Paper #  
Date of Issue 2016-06-02 (MR) 
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 MR2016-8

Conference Information
Committee MRIS ITE-MMS  
Conference Date 2016-06-09 - 2016-06-10 
Place (in Japanese) (See Japanese page) 
Place (in English) Tohoku Univ. 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Recording Systems, etc. 
Paper Information
Registration To MRIS 
Conference Code 2016-06-MR-MMS 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Evaluation of Number of Data Replicas for Urban-area Distributed Storage System Using Hazard Map Information 
Sub Title (in English)  
Keyword(1) Availability  
Keyword(2) Wide-area Disaster  
Keyword(3) Risk-aware Data Replication  
Keyword(4) Urban-area Distributed Storage System  
Keyword(5) J-SHIS  
Keyword(6)  
Keyword(7)  
Keyword(8)  
1st Author's Name Takaki Nakamura  
1st Author's Affiliation Tohoku University (Tohoku Univ.)
2nd Author's Name Satoshi Munakata  
2nd Author's Affiliation Hitachi Solutions East Japan (HSEJ)
3rd Author's Name Kunio Saito  
3rd Author's Affiliation Hitachi Solutions East Japan (HSEJ)
4th Author's Name Jyunko Miyazaki  
4th Author's Affiliation Hitachi Solutions East Japan (HSEJ)
5th Author's Name Shinya Matsumoto  
5th Author's Affiliation Hitachi, Ltd. (Hitachi)
6th Author's Name Hitoshi Kamei  
6th Author's Affiliation Hitachi, Ltd. (Hitachi)
7th Author's Name Hiroaki Muraoka  
7th Author's Affiliation Tohoku University (Tohoku Univ.)
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Speaker Author-1 
Date Time 2016-06-10 09:25:00 
Presentation Time 25 minutes 
Registration for MRIS 
Paper # MR2016-8 
Volume (vol) vol.116 
Number (no) no.83 
Page pp.53-58 
#Pages 6 
Date of Issue 2016-06-02 (MR) 

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