Journal Remap-Based FTL for Journaling File System with Flash Memory

Abstract. Constructing flash memory based storage, FTL (Flash Translation Layer) manages mapping between logical address and physical address. Since FTL writes every data to new region by its mapping method, the previous data is not overwritten by new write operation. When a journaling file system is set up upon FTL, it duplicates data between the journal region and its home location for the file system consistency. However, the duplication degrades the performance. In this paper, we present an efficient journal remap-based FTL. The proposed FTL, called JFTL, eliminates the redundantdata duplication by remapping the journal region data path to home location of file system. Thus, our JFTL can prevent from degrading write performance of file system while preserving file system consistency.

• Type: Conference
• Year: 2007
• Where: HPCC
• Authors: Seung Ho Lim, Hyun-Jin Choi, Kyu Ho Park
• Keywords: Distributed And Parallel Computing, Home Location, HPCC 2007, Journal Region, Journal Remap-based Ftl