AFTL: A Flash Translation Layer Based on Advanced Operations

In this research, we proposed a new page mapping FTL called AFTL in order to fully take advantage of several parallelism provided by multi-level parallel solid-state disk. Through using multi-plane operations and interleave operations, AFTL achieves the goal to exploit the parallelism effectively, meanwhile the combination of identification of hot-cold data, copy-back operation and multi-plane-erase operation decreases the cost of garbage collection a lot, all the factors make the performance get largely promoted. The experimental results show that under the several real world workloads with different channel number, AFTL decreases the write response time 15.3% and 78.9% respectively compared with existent FTL which also exploit multi-level parallelism and DLOOP.