摘要
UBIFS文件系统中由UBI子系统实现磨损均衡管理,但研究发现UBI现有的磨损均衡策略存在着很大的局限性。提出了一种基于逻辑块温度和物理块年龄的新的磨损均衡算法,称为LTPA(leb temperature peb age)算法。该算法实现高温逻辑块与青年物理块,低温逻辑块与老年物理块之间的映射。通过局部操作时间的方法预测逻辑块的温度,使用循环队列的方式管理空闲物理块。通过实验比较证明了LTPA算法在磨损均衡应用中的优越性。
UBI subsystem is achieving the management of the wear leveling in the UBIFS file system, but the study found that the wear of the existing equilibrium strategy UBI there are significant limitations. This paper propose a new algorithm which is based on the temperature of physical block and the age of the logic block, that is called LTPA （leb temperature peb age） algorithm. The algorithm maps the hot logical block to the young physical block, and the temperature of the cold logical block is mapped to an old physical block. It takes the operating time method to predict the logic block temperature, and using the circular queue to manage the free physical blocks. The simulation algorithm proves the superiority of the LTPA algorithm in wear leveling application.
出处
《计算机系统应用》
2011年第12期109-113,共5页
Computer Systems & Applications
