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Paper Abstract and Keywords
Presentation 2013-03-08 11:10
Optimization Locations of Servers in Server Migration Service
Yukinobu Fukushima (Okayama Univ.), Tutomu Murase (NEC), Tokumi Yokohira (Okayama Univ.), Tatsuya Suda (Univ. Netgroup) NS2012-231
Abstract (in Japanese) (See Japanese page) 
(in English) In server migration service (SMS), computers called work places (WPs) are deployed at various locations in a network, and virtual servers for network applications (NW-Apps) may migrate between WPs towards the clients of the NW-App to achieve better QoS. In SMS, an SMS provider tries to provide an NW-App provider with a certain level of QoS that they agree upon, and if the SMS provider fails, it pays penalty (e.g., reimbursement of a part of service charges to users) depending on the degree and length of the QoS violation. Thus, the SMS provider is incentivized to migrate servers between WPs to satisfy the agreed-upon QoS level to reduce the penalty. On the other hand, an SMS provider also needs to be moderate in performing server migrations to avoid degradation of network QoS (i.e., QoS of background traffic) caused by server migrations. This paper formulates an integer-programming model for the off-line server location decision (i.e., when and to which WP servers should migrate) where the penalty associated with NW-App’s QoS violations is minimized, keeping the number and distance of server migrations below a given level. This paper also compares the minimum penalty obtained through solving the integer-programming model against the penalty obtained with a greedy on-line server locations decision algorithm, which migrates a server to a WP that minimizes the current penalty with no consideration of the penalty that will arise in the future. Numerical examples show that the integer-programming model achieves 36% to 49% lower penalty than the greedy algorithm when the degradation of network QoS is little acceptable.
Keyword (in Japanese) (See Japanese page) 
(in English) Cloud computing / Server migration service / Server location decision / / / / /  
Reference Info. IEICE Tech. Rep., vol. 112, no. 463, NS2012-231, pp. 385-390, March 2013.
Paper # NS2012-231 
Date of Issue 2013-02-28 (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 NS2012-231

Conference Information
Committee NS IN  
Conference Date 2013-03-07 - 2013-03-08 
Place (in Japanese) (See Japanese page) 
Place (in English) Okinawa Zanpamisaki Royal Hotel 
Topics (in Japanese) (See Japanese page) 
Topics (in English) General 
Paper Information
Registration To NS 
Conference Code 2013-03-NS-IN 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Optimization Locations of Servers in Server Migration Service 
Sub Title (in English)  
Keyword(1) Cloud computing  
Keyword(2) Server migration service  
Keyword(3) Server location decision  
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1st Author's Name Yukinobu Fukushima  
1st Author's Affiliation Okayama University (Okayama Univ.)
2nd Author's Name Tutomu Murase  
2nd Author's Affiliation Cloud System Research Laboratories, NEC Corporation (NEC)
3rd Author's Name Tokumi Yokohira  
3rd Author's Affiliation Okayama University (Okayama Univ.)
4th Author's Name Tatsuya Suda  
4th Author's Affiliation University Netgroup Inc. (Univ. Netgroup)
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Speaker Author-1 
Date Time 2013-03-08 11:10:00 
Presentation Time 20 minutes 
Registration for NS 
Paper # NS2012-231 
Volume (vol) vol.112 
Number (no) no.463 
Page pp.385-390 
#Pages
Date of Issue 2013-02-28 (NS) 


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