Guaranteeing performance based on time-stability for energy-efficient data centers

Soongeol Kwon, Natarajan Gautam

Research output: Contribution to journalArticlepeer-review

9 Scopus citations


We consider a system of multiple parallel single-server queues where servers are heterogeneous with resources of different capacities and can be powered on or off while running at different speeds when they are powered on. In addition, we assume that application requests are heterogeneous with different workload distributions and resource requirements and the arrival, rates of request are time-varying. Managing such a heterogeneous, transient, and non-stationary system is a tremendous challenge. We take an unconventional approach, in that we force the queue lengths in each powered-on server to be time-stable (i.e., stationary). It allows the operators to guarantee performance and effectively monitor the system. We formulate a mixed-integer program to minimize energy costs while satisfying time-stability. Simulation results show that our suggested approach can stabilize queue length distributions and provide probabilistic performance guarantees on waiting times.

Original languageEnglish (US)
Pages (from-to)812-825
Number of pages14
JournalIIE Transactions (Institute of Industrial Engineers)
Issue number9
StatePublished - Sep 1 2016
Externally publishedYes


  • Data center operation
  • energy efficiency
  • optimization and simulation
  • performance guarantees
  • resource management
  • time-stability

ASJC Scopus subject areas

  • Industrial and Manufacturing Engineering


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