Algorithms (Sep 2008)

Randomized Competitive Analysis for Two Server Problems

  • Jun Kawahara,
  • Kazuo Iwama,
  • Wolfgang Bein

DOI
https://doi.org/10.3390/a1010030
Journal volume & issue
Vol. 1, no. 1
pp. 30 – 42

Abstract

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We prove that there exists a randomized online algorithm for the 2-server 3-point problem whose expected competitive ratio is at most 1.5897. This is the first nontrivial upper bound for randomized k-server algorithms in a general metric space whose competitive ratio is well below the corresponding deterministic lower bound (= 2 in the 2-server case).

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