The design and implementation of a log-structured file system
ACM Transactions on Computer Systems (TOCS)
Computer architecture: a quantitative approach
Computer architecture: a quantitative approach
An Efficient NAND Flash File System for Flash Memory Storage
IEEE Transactions on Computers
A flash-memory based file system
TCON'95 Proceedings of the USENIX 1995 Technical Conference Proceedings
Heuristic cleaning algorithms in log-structured file systems
TCON'95 Proceedings of the USENIX 1995 Technical Conference Proceedings
An efficient multimedia file system for NAND flash memory storage
IEEE Transactions on Consumer Electronics
High-performance NAND and PRAM hybrid storage design for consumer electronics
IEEE Transactions on Consumer Electronics
Advances in communication networks for pervasive and ubiquitous applications
The Journal of Supercomputing
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The existing NAND flash memory file systems have not taken into account multiple NAND flash memories for large-capacity storage. In addition, since large-capacity NAND flash memory is much more expensive than the same capacity hard disk drive, it is cost wise infeasible to build large-capacity flash drives. To resolve these problems, this paper suggests a new file system called NAFS for large-capacity storage with multiple small-capacity and low-cost NAND flash memories. It adopts a new cache policy, mount scheme, and garbage collection scheme in order to improve read and write performance, to reduce the mount time, and to improve the wear-leveling effectiveness. Our performance results show that NAFS is more suitable for large-capacity storage than conventional NAND file systems such as YAFFS2 and JFFS2 and a disk-based file system for Linux such as HDD-RAID5-EXT3 in terms of the read and write transfer rate using a double cache policy and the mount time using metadata stored on a separate partition. We also demonstrate that the wear-leveling effectiveness of NAFS can be improved by our adaptive garbage collection scheme.