【作者】 张允祥；

【导师】 卢萍；

【作者基本信息】 华中科技大学 ， 计算机系统结构， 2011， 硕士

【摘要】 基于对象的存储是一种新的网络存储模式,它融合了SAN的高性能和NAS的跨平台两个优点,发展前景广阔。它将90%左右的数据管理下移动智能存储设备,缓解了元数据服务器和文件系统的压力,在系统的可扩展性、安全性以及智能化存储方面取得了突破。设计基于对象的文件系统,结合对象控制器,构成对象存储系统,应用到Eucalyptus中,提供网络存储服务。分析了Eucalyptus的软件框架,在此基础上针对组件访问接口、网络服务等级协议和虚拟组网三部分进行理论分析,提出改进意见。详细分析Eucalyptus的存储组件Walrus,提供用对象存储系统替换Walrus的理论依据。设计基于对象的可扩展的文件系统:EXOFS。它和传统的文件系统不同,对文件的管理不再是以数据块的形式,而是以对象的形式,对象包括对象属性和数据,对象属性用来描述对象和数据的信息,存放在数据区的首部,方便对象属性的扩展。采用的大、小对象的设计方式,合理的利用磁盘的空间;对象ID采用增量法对ID号进行递增,加上通用标识符构成一个完整的ID,方便了对象的识别。测试结果表明:对象存储系统较之Walrus的硬盘IO速度提升了20%,对象存储系统较之Walrus的磁盘空间利用率提升了10%。更多还原

【Abstract】 Object-based storage is a new network storage model. It combines high performance of SAN and cross-platform of NAS. It moves 90% of the data management down intelligent storage devices, easing pressure of metadata server and file system. It is a breakthrough in scalability, security and intelligent storage of the system. Design object-based file system, with the object controller, condtitutes the object storage system and provides network storage services.Analysis the software framework of Eucalyptus, and suggest improvement for access component interface, network service level agreement and virtual network. Detailed analysis the storage component of Eucalyptus Walrus, provide the theoretical basis for replacement Walrus. Design object-based scalable file system: EXOFS. It is different from the traditional file systems. File management is no longer in the form of data blocks, but in the form of object. Object includes object attribute and data. Object attribute describe the information of object and data, store in the first of data area.Object includes big object and small object, can rational use disk space. Use incremental methods to increase object ID, coupled with a general-purpose identifier constitutes a complete object ID, can identify object ID easily. The results show that: disk IO of object storage system is fastern than Walrus. Disk space utilization of object storage system is improved by 10 percentage points.更多还原