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Algorithmica

, Volume 57, Issue 4, pp 819–847 | Cite as

Scheduling Jobs on Grid Processors

  • Joan Boyar
  • Lene M. Favrholdt
Article

Abstract

We study a new kind of on-line bin packing, motivated by a problem arising when scheduling jobs on the Grid. In this bin packing problem, the set of items is given at the beginning, and variable-sized bins arrive one by one. We analyze the problem using both the competitive ratio and the relative worst order ratio, observing that the two measures often lead to different conclusions.

A closely related problem was introduced by Zhang (Discrete Appl. Math. 72:193–197, 1997). Our main result answers a question posed in that paper in the affirmative: we give an algorithm with a competitive ratio strictly better than 2, for our problem as well as Zhang’s problem. For identical bins, the new algorithm has essentially the same performance as FFD (First-Fit-Decreasing).

Keywords

Grid scheduling problem Zhang’s bin packing problem On-line algorithms First-Fit-Decreasing 

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Copyright information

© Springer Science+Business Media, LLC 2008

Authors and Affiliations

  1. 1.Department of Mathematics and Computer ScienceUniversity of Southern DenmarkOdense MDenmark

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