Improved On-Line Stream Merging: From a Restricted to a General Setting

  • Authors:
  • Wun-Tat Chan;Tak Wah Lam;Hing-Fung Ting;Wai-Ha Wong

  • Affiliations:
  • -;-;-;-

  • Venue:
  • COCOON '01 Proceedings of the 7th Annual International Conference on Computing and Combinatorics
  • Year:
  • 2001

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Abstract

Stream merging is a promising technique for reducing server bandwidth in video-on-demand systems. There are many heuristics for the problem proposed whose effectiveness has been confirmed empirically. However, it is desirable to prove their effectiveness mathematically. In the pioneering work [2], Bar-Noy and Ladner studied stream merging using competitive analysis. They designed an O(log n)-competitive online scheduler, where n is the totaln umber of stream requests. However, their result is applicable only to systems with large client bandwidth and buffer size. In this paper we design the first on-line scheduler for stream merging in the general setting, in which we lift the large resource requirements, and our scheduler achieves constant competitive ratio.