NAND闪存面向负载均衡的空间管理

作者：李华生，郭裕顺 日期：2009-06-17/span> 浏览：4054 查看PDF文档

NAND闪存面向负载均衡的空间管理

李华生，郭裕顺
(杭州电子科技大学 电子信息学院,浙江 杭州 310018)

摘要：为延长NAND闪存的寿命，需要采用面向负载均衡的空间管理策略来提高闪存擦除的均匀程度和减少擦除次数。采用面向负载均衡的空间管理策略及模块化的设计思路，把空间管理划分为3个相对独立的部分：空间分配、空间删除和垃圾空间回收，各个部分独立工作，分别考虑和实现负载均衡，并实现了简洁、实用的垃圾回收算法。实验结果表明，所设计的NAND闪存文件系统空间管理策略很好地保证了空间管理的基本功能，并具有良好的负载均衡特性。
关键词：负载均衡；空间管理；垃圾空间回收
中图分类号：TP316文献标识码：A文章编号：1001-4551(2009)05-0063-04

Space management strategy based on load balancing for NAND flash file system
LI Huasheng，GUO Yushun
(School of Electronics & Information, Hangzhou Dianzi University, Hangzhou 310018, China)
Abstract: To increase the life span of NAND flash memory, space management strategy should be based on load balancing, which can effectively improve the uniformity of erasing and reduce the total number of erasing. The space management strategy reported was divided into three independent parts: the allocation of space, the deletion of space and the recycling of space .These three parts worked independently to achieve load balancing, and space recycle arithmetic was given in detail. The experiment results show that the space management strategy works well for load balancing.
Key words: load balancing； space management； garbage space recycle
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