一种基于闪存的低能耗缓冲区管理算法

摘要

闪存以其低能耗、低延迟、小巧轻便及高抗震性等特点广泛应用于不同环境中以消除磁盘机械寻址所带来的高能耗及高延迟等问题。提出一种基于闪存硬盘（ SSD）的低能耗缓冲区置换算法AFC。当需要选择置换页时，AFC使用基于代价的启发式来选择置换页。 AFC的设计目标是基于用户设定的权值，在最小化能耗和最大化吞吐量之间取得平衡。对不同型号的闪存芯片进行了实验验证，实验结果表明，基于AFC来管理缓冲区数据时，可以显著降低系统的能耗。%As an important alternative to conventional magnetic disks flash⁃based devices which have the features of lower power consumption no mechanical parts portable and shock resistance are used extensively in different environments to reduce the power consumption and long time of mechanical addressing for conventional magnetic disks.An adaptive flash⁃aware buffer replacement al⁃gorithm namely AFC is proposed based on flash chip based hard disk namely Solid⁃State Disk SSD . AFC adopts cost⁃based heu⁃ristics to select victim pages for replacement. The aim of AFC is to leverage between maximum performance and minimum power consumption.The experimental results show that AFC significantly reduces power consumption based on different flash chips.