摘要： 分析flash文件系统的损耗均衡问题，指出损耗均衡的触发条件对系统I/O性能的影响。在最新UBIFS文件系统上运行测试程序，结果证明在不同损耗均衡触发条件下，系统I/O性能的最大差距超过20%。针对现有损耗均衡算法的不足提出一种改进的自适应算法。
关键词:
损耗均衡,
垃圾回收,
系统I/O性能,
flash文件系统
Abstract: This paper analyzes the problem of file system wear-leveling, and points out that the wear-leveling trigger condition will impact system I/O performance. Benchmark is performed on a latest flash file system——UBIFS, and the results show that system I/O performances vary by 20% under different trigger threshold. Aiming at the shortcoming of existing wear-leveling algorithm, it proposes an improved self-adapting algorithm.
Key words:
wear-leveling,
garbage-collection,
system I/O performance,
flash FS
中图分类号:
韩春晓;陈香兰;李 曦;龚育昌. UBIFS损耗均衡对系统I/O性能的影响[J]. 计算机工程, 2009, 35(6): 260-262.
HAN Chun-xiao; CHEN Xiang-lan; LI Xi; GONG Yu-chang. Impact of UBIFS Wear-leveling on System I/O Performance[J]. Computer Engineering, 2009, 35(6): 260-262.