On the twin measure and system predictability and fairness

  • Authors:
  • David Raz;Hanoch Levy;Benjamin Avi-Itzhak

  • Affiliations:
  • Tel-Aviv University, Tel-Aviv, Israel;Tel-Aviv University, Tel-Aviv, Israel;Rutgers University, New Brunswick, NJ

  • Venue:
  • ACM SIGMETRICS Performance Evaluation Review
  • Year:
  • 2006

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Abstract

Two identical customers with deterministically identical service times arrive at a queueing system simultaneously (Twins), but leave the system 2 hours apart. Is their sojourn time predictable? Is the system fair? We propose a novel measure based on the principle that in a predictable and fair system, "twin" customers should not depart the system very far apart. We analyze this measure for a number of common service policies and compare the results. We compare the results to those of other fairness and predictability approaches proposed recently and discuss its usefulness.