storage hierarchy

In many systems, such as SRB ( Storage Resource Broker), hierarchical directory structure is adopted to manage metadata. There are some simple facets because of the hierarchy and single frame characters of metadata.

在许多系统，比如SRB（Storage Resource Broker）中都采用层次目录结构管理元数据，由于元数据固有的层次性和结构单一性，这种管理方式有其方便简明的一面。

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Hierarchical storage management is based on the concept of a cost-performance storage hierarchy.

分层存储管理是建立在性价比存储层次的概念之上的.

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A typical CMP ( Chip Multi-Processor) architecture often has a shared L2 cache and lower storage hierarchy. Sharing the L2 cache allows high cache utilization and avoids duplicating cache hardware resources.

在典型的多核处理器（CMP，Chip multi-Processor）体系结构中，多个处理器核共享二级高速缓存，这种方式不仅能够提高高速缓存的利用率，还能避免存储器硬件资源的浪费。

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