吉林大学学报(工学版) ›› 2015, Vol. 45 ›› Issue (3): 938-945.doi: 10.13229/j.cnki.jdxbgxb201503037

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Request migration based task scheduling algorithm in VoD system

LI Jun1, 2, NI Hong1, WANG Ling-fang1, CHEN Jun1   

  1. 1.National Network New Media Engineering Research Center, Institute of Acoustics, Chinese Academy of Sciences, Beijing 100190,China;
    2.University of Chinese Academy of Sciences, Beijing 100190,China
  • Received:2013-08-21 Online:2015-05-01 Published:2015-05-01

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Abstract: A Request Migration based Task Scheduling algorithm (RMTS) is proposed. When a new request is received, the scheduler running RMTS calculates a probability based on the current system load and request migration path length to determine whether migration is needed. If migration is needed, the optimal migration path is selected. With one video server failure, the scheduler transfers all the requests in service to another server to ensure service uninterrupted. The request success rate and service delay are used to measure the system performance. Experiment results demonstrate that the proposed RMTS performs better than traditional request migration algorithm that, with RMTS, the request success rate and service delay are improved by 14% and 15% respectively.

Key words: information processing, task scheduling, request migration, service uninterruptable, request success rate, service delay

CLC Number: 

  • TP301.6
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