基于对象存储的新型元数据管理策略

在对已有对象存储元数据管理策略进行研究的基础上，提出一种基于对象存储的新型元数据管理策略。该策略将命名空间的目录子树分割为等粒度的中子树，将中子树的根目录名和文件名的组合作为哈希参数进行哈希运算，元数据服务器根据其所得哈希值确定存储路径。实验结果表明，该策略在处理元数据重命名操作和修改文件名时，可以避免大量元数据迁移及网络开销问题。

New Kind of Metadata Management Strategy Based on Object Storage

On the basis of the research of previous object storage metadata management strategies, this paper puts forward a new kind of metadata management strategy. The method is to divide namespace directory into neutron trees, and compute with hash function using the combination of the root directory name and file name. Metadata Server（MDS） determines its storage path according to the hash value. Experimental result shows that this new kind of metadata management tactics can avoid the massive metadata migration problems and network overhead problems in dealing with metadata rename operation and modify filename.