1. Performance Improvement of Flash-Memory-Based NTFS/EXT2 – A Firmware Solution Po-Lang Wu, Johnson Chang, and Tei-Wei Kuo National Taiwan University

2. Performance Improvement for NTFS/EXT2 Objective: –Improve the performance of flash memory with the feature considerations of file systems. Method: –Cluster metadata files and metadata to improve system performance and to reduce the maintenance overhead. Architecture –Adopt page-level mapping and a log-based updating mechanism. –Write mapping and version information in a summary page. Metadata Summary Block Set Metadata

3. System Architecture File System Identifier: Determine the layout of the file systems Metadata Filter: Separate Metadata requests and Userdata requests Metadata FTL: Manage the Metadata location and translate to IO Operations Cleaner: Do garbage collection to reclaim invalid pages

4. Performance Evaluation Ext2Ext3NFTS ImprovementBonnie++File-copy Traces FTL0% NFTL19%22%10%14% BL37%49%24%13% The experiments on EXT2 are on a DaVinci Evaluation Board with realistic transmission patterns and benchmark. Bonnie++: Sequential/Random files creation and deletion NTFS: Simulation over a 7-day disk trace