用于网络存储系统的存储空间动态分配方法

提出一种在网络存储系统中动态分配存储空间的方法，可以在保持用户视图的逻辑空间大小不变的情况下，按需分配用户实际所用存储空间。与传统基于逻辑卷管理器的动态分配方法相比，该方法无须修改文件系统元数据，具有更好的可扩展性，已应用于TransCom系统中。实践表明，它实现简单、开销较小，可满足实际使用需求。

Approach to Allocate Storage Space Dynamically in Network Storage System

This paper presents a new approach to allocate storage space in network storage system. It employs an Allocate on Demand(AoD) strategy, which can adjust real storage space used without modifying the logical volume size from a user’s perspective. It does not need to reconfigure file system size as in traditional methods if storage space is extended. It is much more flexible and scalable than traditional logical volume manager based methods. Primary results from the application in TransCom system show that the overhead is small and acceptable, it can meet the practical requirement.