Replication algorithms to retrieve scalable streaming media over content delivery networks

Zhou Su*, Jiro Katto, Yasuhiko Yasuda

*この研究の対応する著者

研究成果: Conference contribution

7 被引用数 (Scopus)

抄録

CDN (Content Delivery Networks) improves end-user performance by replicating web contents on a group of geographically distributed content servers. Replication Algorithm plays an important role in helping users to retrieve Web objects from the content servers. If a user can directly get the requested objects from the content server, he need not to contact the remote origin server and the user delay can be reduced. However, current replica strategies in CDN are to simply and repeatedly keep the complete replica of the original object on many content servers. This method has some disadvantages, including too much consumed server space and a waste of the storage cost. It is more serious for replicating some large-sized objects such as streaming media, which are being distributed over the Internet more and more. In this paper, we discuss a replication strategy for scalable video streaming in CDN to reduce user response and storage cost. Based on theoretical analysis, assuming layered video coding, we propose a novel replication algorithm which deals with following three problems. (1) How many content servers should be selected to replicate a given video content? (2) For a single video content, how many layers should be kept in a given content server? (3) After selecting a group of content servers for each video content, how do we decide the replication priority for each content server? Simulation results show that the proposed algorithm can efficiently resolve the above problems, and provide much better performance than the conventional methods.

本文言語English
ホスト出版物のタイトルProceedings of the 5th ACM SIGMM International Workshop on Multimedia Information Retrieval, MIR 2003
出版社Association for Computing Machinery, Inc
ページ255-261
ページ数7
ISBN(電子版)1581137788, 9781581137781
DOI
出版ステータスPublished - 2003 11 7
イベント5th ACM SIGMM International Workshop on Multimedia Information Retrieval, MIR 2003 - Berkeley, United States
継続期間: 2003 11 7 → …

出版物シリーズ

名前Proceedings of the 5th ACM SIGMM International Workshop on Multimedia Information Retrieval, MIR 2003

Other

Other5th ACM SIGMM International Workshop on Multimedia Information Retrieval, MIR 2003
国/地域United States
CityBerkeley
Period03/11/7 → …

ASJC Scopus subject areas

  • メディア記述
  • ソフトウェア
  • 情報システム
  • コンピュータ サイエンスの応用
  • 信号処理

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