Adaptive prefetching algorithm in disk controllers

  • Authors:
  • Qi Zhu;Erol Gelenbe;Ying Qiao

  • Affiliations:
  • University of Houston-Victoria, TX 77901, United States;Imperial College London, SW7 2BT, United Kingdom;Virginia Polytechnic Institute and State University, VA 24060, United States

  • Venue:
  • Performance Evaluation
  • Year:
  • 2008

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Abstract

A disk caching algorithm is presented that uses an adaptive prefetching scheme to optimize the system performance in disk controllers for traces with different data localities. The algorithm uses on-line measurements of disk transfer times and of inter-page fault rates to adjust the level of prefetching dynamically, and its performance is evaluated through trace-driven simulations using real workloads. The results confirm the effectiveness and efficiency of the new adaptive prefetching algorithm.