dcfs

Design and implement DCFS on the Dawning 4000L Cluster. Present methods to evaluate a cluster file system and define scalability of read/ write and metadata operations.

在曙光4000L上设计并实现曙光机群文件系统DCFS，给出了机群文件系统性能评价的方法，定义了读写带宽性能和元数据吞吐率的可扩展性度量。

The metadata throughput of DCFS is 7.391 times as PVFS on average.

DCFS元数据吞吐率的性能平均比PVFS高6.391倍；

With the design and implementation of DCFS ( Dawning Cluster File System), this dissertation deeply discusses the key technologies of a cluster file system and studies problems in designing the servers of a cluster file system.

本文结合曙光机群文件系统DCFS的设计和实现，对机群文件系统设计的关键问题进行了讨论，并针对机群文件系统服务器设计的几个问题进行了研究。

Finally the helix double-clad fiber is discussed by using this method, and the conclusion is that it is better than other truncated inner cladding DCFs.

最后用这种方法对螺旋型双包层光纤进行分析，得出它比一般缺陷型双包层光纤优异的结论。

And the overall response time of DCFS is 18.2% as PVFS in the synthesis workload experiment.

DCFS在综合负载测试中表现出比PVFS更好的性能，全局响应时间为PVFS的18.2%。

Load-Balance Policy in DCFS, the Dawning Cluster Filesystem

曙光机群文件系统DCFS负载平衡策略

This dissertation designs a metadata consistency protocol according to the metadata placement policy and cache management in DCFS. This protocol ensures the consistency of metadata in a cluster file system and has acceptable cost. 4.

作者结合DCFS元数据分布策略和元数据缓存管理设计了元数据一致性协议，该协议保证了元数据一致性，分析表明其开销是可以接收的。