基于局部性和分区磁盘的文件定位优化

File Reallocation Optimization Based on Localization and Zoned-Disk

计算机虚拟存储体系结构中磁盘文件访问存在局部性,大量访问集中在少数文件上。针对该问题,研究分区盘技术,提出一种动态文件定位优化方法,通过动态采样统计,将访问次数集中的文件定位在使用分区盘技术且数据传输率较高的磁盘区域中。理论分析及实验结果表明,该方法可以提高系统整体的I/O性能。

Disk file accesses are localized just like RAM access localization in the virtual memory architecture. Most file accesses localize few files. Aiming at this problem, using the Zoned-Disk technology, a dynamic optimizatiom method is proposed. Based on the sampling and statistic results, the frequently accessed files are moved to the zone which is with higher data transfer rate in a Zoned-Disk. Theoretical analysis and practical experimental results show this method improves the I/O performance of the whole system.