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On the power of two choices: Balls and bins in continuous time

2005
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The Annals of Applied Probability
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Suppose that there are n bins, and balls arrive in a Poisson process at rate \lambda n, where \lambda >0 is a constant. Upon arrival, each ball chooses a fixed number d of random bins, and is placed into one with least load. Balls have independent exponential lifetimes with unit mean. We show that the system converges rapidly to its equilibrium distribution; and when d\geq 2, there is an integer-valued function m_d(n)=\ln \ln n/\ln d+O(1) such that, in the equilibrium distribution, the maximum

doi:10.1214/105051605000000205
fatcat:l5qenlu46fcqlglzvbatq7vjc4