Energy-aware buffer management scheme for NAND and flash-based consumer electronics

Because NAND flash memory shows a number of remarkable advantages such as non-volatility, high access performance, low power consumption, shock resistance, and small size, it has become the dominant data storage device for consumer electronics. However, NAND flash memory exhibits very different physical characteristics from hard disks so that existing buffer management schemes designed for hard disks perform badly when they are deployed on NAND flash-based consumer electronics directly. In this paper, an energy-aware buffer management scheme is proposed for NAND flash-based consumer electronics. The proposed scheme introduces a Low Cost First strategy for selecting a victim page and a clustering algorithm for grouping dirty data. Experimental results show that the proposed scheme performs better than existing buffer management schemes in terms of the buffer hit ratio, the number of write operations, and the energy consumption.