摘要： 传统配置技术中配置容量往往得不到充分利用,并且已经分配的存储资源占用的存储空间即使被释放了也无法再次使用。为此,应用自动精简配置(TP)技术按需分配存储资源,解决存储资源的浪费问题。针对一般文件系统中空闲空间回收方法均需要占用额外的系统资源问题,提出SAN环境下基于NTFS文件系统簇位示图的空间智能回收方法。实验结果表明,NTFS文件系统的空间回收方法可有效回收空闲空间,当TP页大小设置在KB级时,回收效率可达90%以上,同时该方法推迟了容量预警和在线扩容的时间,提高了存储利用率。

关键词: 自动精简配置, 存储区域网络, 回收存储, NTFS文件系统, 簇位示图, 一致性

Abstract: Configuration capacity is often underutilized in the traditional configuration techniques.And storage space which is occupied by the storage resources that are allocated already cannot be used again even if they are released.Thin Provisioning(TP) serves effectively to solve the problem of storage resources waste which is caused by the traditional configuration technology by allocating space on demand.In view of the problem that the reclaim methods of free space require additional system resources in the general file system,it puts forward the smart space reclamation in the Storage Area Network(SAN) environment diagram based on the NTFS file system cluster bit.Experimental result demonstrates that the reclaim method can reclaim free space in the NTFS file system effectively.The reclaim efficiency is up to 90% when TP page size is set in KB.At the same time,the method delays the time of the capacity warning and expansion online effectively,and it improves the utilization rate of storage greatly.

Key words: Thin Provisioning(TP), Storage Area Network(SAN), reclaiming storage, NTFS file system, cluster bitmap, coherence

中图分类号: 

• TP316