Workload-driven adaptive log buffer-based FTL

Abstract

Flash translation layer (FTL) is generally used for NAND flash memory in order to handle the mapping between logical page address and physical page address. Log buffer-based FTLs provide good performances with small-sized mapping information. In designing the log buffer-based FTL, one important factor is to determine the mapping architecture between data block and log block, called associativity. While previous static schemes use fixed associativities, our scheme adjusts the associativity dynamically based on the run-time workload variation improving the performance by 5∼16% compared to the static scheme.