A request distribution method for clustered VOD servers considering buffer sharing effects

Dae Hyun Cho, Ki Yong Lee, Seung Lak Choi, Yon Dohn Chung, Myoung Ho Kim, Yoon Joon Lee

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)


The clustering of multiple video servers is a popular architecture for huge VOD systems. In a clustered VOD system, user requests are distributed among the video servers by the dispatcher. Each video server consists of independent disks and a local buffer memory. The buffer mechanism is recognized helpful to the improvement of the disk performance. However, its effects have not been effectively utilized so far for the request distribution strategies of the clustered VOD system. In this work, we investigate the effects of buffer sharing on the throughput of the clustered VOD system. And, based on the results, we propose a request distribution method for the clustered VOD system, where the buffer sharing effects are utilized for improving the system's throughput. By experiments, we evaluate the performance of the proposed method compared with the conventional request distribution methods.

Original languageEnglish
Pages (from-to)335-346
Number of pages12
JournalJournal of Systems Architecture
Issue number1-2
Publication statusPublished - 2008 Jan

Bibliographical note

Funding Information:
This research was supported by the Ministry of Information and Communication, Korea, under the College Information Technology Research Center Support Program, Grant Number IITA-2006-C1090-0603-0031.


  • Buffering
  • Clustered VOD system
  • Multimedia system
  • Request distribution

ASJC Scopus subject areas

  • Software
  • Hardware and Architecture


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