LHFTL: A novel SSD performance optimisation approach using the LH index

Abstract

Flash Translation Layer (FTL) based Solid State Drives SSDs have a crucial role for flash storage devices for many reasons (i.e., lower energy consumption, better performance and less heating). Furthermore, it suffers from some issues, mainly the asynchronous read/write operation problem and erase-before-write operation. FTL technique generally involves the B-tree system, which consumes more random memory in relation to its recursive mechanism; consequently, extra memory consumption. In this contribution, we propose a new approach based on Linear Hashing LH, namely LH for FTL (LHFTL) with the aim of reducing data access compared to the B-tree system. The development of two methods has been achieved the SSD reading/writing characteristics, the obtained results reveal that the LHFTL read operations, for an order of 100 MB, are 3 times smaller than the B-tree based approach and 300 times smaller based on the write operations.