Abstract:

Review the typical cloud computing technology，HDFS is singled out to research. By analysing its elements we abstract several object sets and relation sets，even more we propose the concept of cluster riplet-space. Regress to implement from abstract level，HDFS use a centralization structure to implement cluster triplet-space that form the bottleneck of system performance and stagnation point of cluster. By rejecting the specific implementation，triplet-space construct a setting to define question on abstract level.

Key words: HDFS, triplet-space, GFS, Sector/Sphere