TCFTL: Improved Real-Time Flash Memory Two Cache Flash Translation Layer Algorithm

The traditional flash translation layer (FTL) algorithm is mainly aimed at optimizing the average response time of flash reading and writing. Since it cannot be updated in place, for the traditional FTL algorithm, it is necessary to find a free page for writing each time. When a block is full, it will redistribute a free block. Therefore, when the flash memory is almost full, a written request will lead to a garbage collection, which will have many write copies, which will lead to a substantial decline in response time. This paper proposes an algorithm that makes full use of spatial locality and temporal locality to optimize the address cache in Demand-based Flash Translation Layer (DFTL) algorithm. In the experiment, this algorithm experiment and good results are obtained.