3DFTL: a three-level demand-based translation strategy for flash device

Abstract

3DFTL is a demand-based flash translation layer (demand-based FTL) that can withstand caching data loss due to unexpected events such as power-loss. Its mapping table in the flash memory is designed with the capabilities of being instantaneously updated with zero additional write operations. Moreover, the average cache miss penalty of 3DFTL is also lower than previous demand-based FTLs. As a result, not only the mapping table of 3DFTL guarantees data consistency, but 3DFTL also shows 16.42% decrease in terms of the average system response time comparing with the DFTL.