摘要： 传统节能策略通过控制组件状态切换来节省能耗，但状态切换本身需要耗费一定能量。为此，提出一种基于预读策略的节能数据访问技术。引入文件系统数据访问中的预读方式，读取数据并将其聚合到一起进行访问，减少设备组件的状态切换，从而实现降低能耗的目的。实验结果表明，在多媒体数据访问方式下使用该技术能节省70%以上的磁盘能耗。

关键词: 节能, 预读策略, 数据聚合, 数据访问, 磁盘能耗

Abstract: Traditionally energy saving can be attained by switch of components’ energy states, but the switch itself costs a lot of energy. This paper proposes an energy efficient data access technique based on readahead strategy. It extends the readahead technique to the energy saving field, reduces the power consumption by integrating data that need to be read to reduce the amount of switches among different energy states of computer components. Experimental results show that in the case of accessing multimedia data, this technique can reduce energy consumption of disk by over 70%.

Key words: energy efficient, readahead strategy, data aggregation, data access, energy consumption of disk

中图分类号: 

• TP391