Not logged in.

Contribution Details

Type Journal Article
Scope Discipline-based scholarship
Title FD-Buffer: A Cost-Based Adaptive Buffer Replacement Algorithm for FlashMemory Devices
Organization Unit
  • Contribution from another University/Organization than University of Zurich
  • Sai Tung On
  • Shen Gao
  • Bingsheng He
  • Ming Wu
  • Qiong Luo
  • Jianliang Xu
Item Subtype Original Work
Refereed Yes
Status Published in final form
Journal Title IEEE Transactions on Computers
Geographical Reach international
ISSN 0018-9340
Volume 63
Number 9
Page Range 2288 - 2301
Date 2014
Abstract Text In this paper, we present a design and implementation of FD-Buffer, a cost-based adaptive buffer manager for flash memory devices. Due to flash memory’s unique hardware features, it has an inherent read-write asymmetry: writes involve expensive erase operations, which usually makes them much slower than reads. To address this read-write asymmetry, we revisit buffer management and consider the average I/O cost per page access as the main cost metric, as opposed to the traditional miss rate. While there have been a number of buffer management algorithms that take the read-write asymmetry into consideration, most algorithms fail to effectively adapt to the runtime workload or different degrees of asymmetry. In this paper, we develop a new replacement algorithm in which we separate clean and dirty pages into two pools. The size ratio of the two pools is automatically adapted based on the read-write asymmetry and the runtime workload. We evaluate the FD-Buffer with trace-driven experiments on real flash memory devices. Our trace-driven evaluation results show that our algorithm achieves 4.0-33.4 percent improvement of I/O performance on flash memory, compared to state-of-the-art flash-aware replacement policies.
Digital Object Identifier 10.1109/TC.2013.52
Export BibTeX