CONSIDERING DATA ACCESS PATTERN IN FLASH TRANSLATION LAYER FOR FLASH MEMORY STORAGES

摘要

Flash Translation Layer (FTL) is the device driver software that works in conjunction with file system to make flash memory device appear to the system like a disk drive. In this paper, we study a block management algorithm in Flash Translation Layer. Proposed scheme classifies data blocks on the fly according to their write access frequencies and improves the space utilization by managing the blocks according to their hotness degree. To evaluate the proposed scheme, we developed a simulator and performed trace-driven simulations. Simulation results show that the proposed scheme improves the space utilization and there is a tradeoff between the space utilization and the number of erase/write operations.