Proceedings of the IEEK Conference (대한전자공학회:학술대회논문집)

The Institute of Electronics and Information Engineers (대한전자공학회)
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New Dynamic Adaptive Threshold Destage Algorithms for Cached RAID 5

RAID 5의 성능향상을 위한 쓰기 캐쉬의 동적 적응 반출기법

  • Yie, Hyeok (School of Electronic Engineering Inha University) ;
  • Choi, Sang-Bang (School of Electronic Engineering Inha University)
  • 이혁 (인하대학교 전자공학과) ;
  • 최상방 (인하대학교 전자공학과)
  • Published : 2000.06.01
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Abstract

In this paper, we propose a new destage algorithms, called the Dynamic Adaptive Threshold which determines turn-on and turn-off thresholds dynamically depending on the current write cache occupancy level and the differential rate of the host write requests. For performance evaluation, the proposed algorithm is compared with the wellknown High-Low Water Mark (HLWM) algorithm. Performance tests are fulfilled with our cached RAID 5 simulator. The simulation results show that the proposed algorithm outperforms the HLWM algorithm in terms of response time of host reads and write cache hit ratio under various workloads.

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