摘要： 针对静态资源管理方式存储资源利用率低、无法满足多类应用不同需求的问题，设计实现一种基于动态机制的虚拟存储系统ASD。采用写时分配策略解决存储资源利用率低的问题，采用地址动态映射机制实现按照数据特性管理存储资源。测试表明，与静态管理方式相比，以ASD为基础的ext2文件系统的资源利用率和读写性能有明显改善。

关键词: 存储虚拟化, 写时分配, 动态地址映射, 数据布局

Abstract: There are two problems in static storage resource management that its storage resource utilization is inefficient and it can not meet the requirements of multiple-class applications. This paper designs and implements a virtual storage system named ASD(Allocate-on-demand Storage Device) to solve the problems, which uses the allocate-on-demand policy to relieve the problem of underutilization of storage resource, and uses the dynamic mapping mechanism to manage storage resource in accordance with the access characteristics of applications. The results of test indicate that, compared with the static management method, the performance and resource utilization of Linux ext2 file system based on ASD platform has distinguished improvement.

Key words: storage virtualization, allocate-on-demand, dynamic address mapping, data layout

中图分类号: 

• N945