基于目录路径的元数据管理方法

提出目录路径属性与目录对象分离的元数据管理方法,扩展了现有的对象存储结构.该方法能够有效避免因为目录属性修改而导致的大量元数据更新与迁移;通过减少前缀目录的重迭缓存提高了元数据服务器Cache的利用率和命中率;通过减少遍历目录路径的开销和充分开发目录的存储局部性,减少了磁盘I/O次数;通过元数据服务器的动态负载均衡避免单个服务器过载.实验结果表明,该方法在提高系统性能、均衡元数据分布以及减少元数据迁移等方面具有明显的优势.

A Metadata Management Method Based on Directory Path

A metadata management method dividing directory path attribute from directory object is proposed, which extends the present object storage architecture. This method avoids efficiently the large-scale metadata migration according to the updating directory attributes, improves the cache utilization and hit rate by reducing the overlap cache of prefix directory, reduces the disks I/O demands by reducing the overhead of traversing the directory path and exploiting directory locality, and avoids overloading a single metadata server by dynamic load balancing. Experimental results demonstrate that this method has obvious advantages in improving the throughput, scalability, balancing metadata distribution, and in reducing the metadata migration.