CAJ | 학술논문

存储设备的功耗在整个计算机系统尤其是数据中心所占的比例已经越来越大。要进行硬盘功耗优化，在缺少硬件直接测量硬盘功耗的情况下就需要对硬盘功耗进行建模。现代操作系统通过文件系统层进行硬盘I/O操作管理，并提供实时监控数据。通过对EXT2、EXT4和NILFS2等常用文件系统的硬盘I/O过程进行实验分析，发现不同的文件系统对硬盘功耗具有不同的影响，为了刻画这种差异性，提出基于I/O空闲率的硬盘功耗建模与评估方法。同时使用I/O空闲率来指导硬盘进行功耗优化，将视频播放器的I/O空闲率由4.79%提高到96.55%，硬盘的功耗降低45.28%。
존저설비적공모재정개계산궤계통우기시수거중심소점적비례이경월래월대。요진행경반공모우화，재결소경건직접측량경반공모적정황하취수요대경반공모진행건모。현대조작계통통과문건계통층진행경반I/O조작관리，병제공실시감공수거。통과대EXT2、EXT4화NILFS2등상용문건계통적경반I/O과정진행실험분석，발현불동적문건계통대경반공모구유불동적영향，위료각화저충차이성，제출기우I/O공한솔적경반공모건모여평고방법。동시사용I/O공한솔래지도경반진행공모우화，장시빈파방기적I/O공한솔유4.79%제고도96.55%，경반적공모강저45.28%。
Storage is consuming more and more energy in computer, especially in data center. In order to reduce disk power, it needs to establish the disk power module when there no hardware to measure the power. Modern operating system uses file systems to manage I/O and provide real-time monitoring data. This paper analyzes the I/O processing of EXT2, EXT4 and NILFS2 file systems, and discovers that different file systems have different influence on disk power. This paper presents I/O idle rate to depict the difference, more specifically, proposes the disk power module and evaluates method by using I/O idle rate. This paper also uses I/O idle rate to reduce disk power, when improving the I/O idle rate of video from 4.79%to 96.55, reducing the disk power 45.28%.