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IEICE TRANSACTIONS on Information

A Meta-Heuristic Approach for Dynamic Data Allocation on a Multiple Web Server System

Masaki KOHANA, Shusuke OKAMOTO, Atsuko IKEGAMI

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Summary :

This paper describes a near-optimal allocation method for web-based multi-player online role-playing games (MORPGs), which must be able to cope with a large number of users and high frequency of user requests. Our previous work introduced a dynamic data reallocation method. It uses multiple web servers and divides the entire game world into small blocks. Each ownership of block is allocated to a web server. Additionally, the ownership is reallocated to the other web server according to the user's requests. Furthermore, this block allocation was formulated as a combinational optimization problem. And a simulation based experiment with an exact algorithm showed that our system could achieve 31% better than an ad-hoc approach. However, the exact algorithm takes too much time to solve a problem when the problem size is large. This paper proposes a meta-heuristic approach based on a tabu search to solve a problem quickly. A simulation result shows that our tabu search algorithm can generate solutions, whose average correctness is only 1% different from that of the exact algorithm. In addition, the average calculation time for 50 users on a system with five web servers is about 25.67 msec while the exact algorithm takes about 162 msec. An evaluation for a web-based MORPG system with our tabu search shows that it could achieve 420 users capacity while 320 for our previous system.

Publication
IEICE TRANSACTIONS on Information Vol.E96-D No.12 pp.2645-2653
Publication Date
2013/12/01
Publicized
Online ISSN
1745-1361
DOI
10.1587/transinf.E96.D.2645
Type of Manuscript
Special Section PAPER (Special Section on Parallel and Distributed Computing and Networking)
Category

Authors

Masaki KOHANA
  Seikei University
Shusuke OKAMOTO
  Seikei University
Atsuko IKEGAMI
  Seikei University

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