基于维层次的压缩Cube

Compressed cube based on dimension hierarchy

提出利用Cube中的维层次来创建高性能的DHCube(dimensionhierarchycube) ,在DHCube中存储构成Cube的所有维的所有层次粒度组成的数据单元 ,从而实现了在 1个DHCube中就可以存储构成该Cube的d个维所创建的 2 d 个立方体视图的所有信息 ,从而压缩Cube存储空间 ,提高MOLAP查询效率 ,减少Cube创建时间和更新时间 .

A high performance DH_Cube (dimension hierarchy cube) with the dimension hierarchy on the cube is presented. The DH_Cube stores all data cells constructed by all gradularities of all dimensions on the cube. The DH_Cube can contain the information of 2d (d is the number of dimensions) data cube view created by d dimensions of the cube. Thereby it compresses the storage space, improves the efficiency of MOLAP (multidimensional on-line analysis process) queries, and reduces the creation time and update time of the cube.