基于Linux的大容量Yaffs文件系统性能优化与实现  

PERFORMANCE OPTIMISATION OF LARGE CAPACITY YAFFS FILE SYSTEM BASED ON LINUX AND ITS IMPLEMENTATION

作　　者：刘翠玲[1] 时兴[1] 孙晓荣[1] 梁明全[1] 

机构地区：[1]北京工商大学计算机与信息工程学院,北京100048

出　　处：《计算机应用与软件》2014年第9期37-39,共3页Computer Applications and Software

摘　　要：针对Yaffs文件系统应用在大容量存储设备时所产生挂载速度慢的问题,提出一种新的改进方法,并在Yaffs2文件系统中进行了实现。通过在Yaffs2文件系统中增加适当的偏移量,使得在扫描挂载文件系统时减少了不必要的扫描时间,从而加快了挂载的速度。在最新的Yaffs2文件系统当中,依据该方法修改Yaffs2源代码,同时,在Linux系统上加入了对改进后文件系统的支持。对改进前后的性能进行分析和实验,表明了该方法的可行性。Aiming at the problem of slow mount speed of Yaffs file system occurred when to be applied in storage devices with large capacity, we propose a new improved method, and implement it in Yaffs2 file system. By adding appropriate offset in Yaffss file system, the unnecessary scanning time is reduced when scanning the mounting file system, thereby the mounting speed is accelerated. In latest Yaffs2 file system, we modify the source code of Yaffs2. Meanwhile, we add the support to the modified Yaffs file system in the Linux system, and analyse the performance before and after the modification. Experiments demonstrate the feasibility of the method.

关 键 词：YAFFS 文件系统 LINUX FLASH 

分 类 号：TP315[自动化与计算机技术—计算机软件与理论]