JFFS文件系统性能分析与改进  

Analysis and improvement of the JFFS

作　　者：王健[1] 查峰[1] 

机构地区：[1]大连理工大学,大连116024

出　　处：《仪器仪表学报》2006年第z1期952-953,共2页Chinese Journal of Scientific Instrument

摘　　要：日志文件系统JFFS2广泛应用于嵌入式系统之中,它是为相对较小的Flash芯片设计的。当它用在大规模的Flash芯片上时,就会有比较严重的问题。在概述了因Flash技术和JFFS2设计目标而产生的局限性之后,本文提出了一种基于B+树和多级索引的,分配Flash存储空间的新方法。B+树结构加快了定位的速度,而多级索引使在Flash上创建超级块成为可能。JFFS2,the Journalling Flash File System version 2,is widely used in the embedded systems world.It was designed for relatively small flash chips and has serious problems when it is used on large flash devices.After an overview of the restrictions imposed by Flash technology and the design aims of JFFS2,this paper proposes a new means of managing flash memory space for flash memory-specific file systems based on B+tree which accelerates the location speed and multi-index which makes it possible to build superblock on the Flash.

关 键 词：JFFS B+树 超级块 

分 类 号：TH7-55[机械工程—仪器科学与技术]