二维瓦片矢量基对二次映射分布方法

针对基于对象存储系统中各个存储设备的性能差异，提出了一种二维瓦片矢量基对二次映射分布方法。首先，构建一组性能相同、容量无限的虚拟设备，并根据矢量基对分布模板将二维瓦片分布到M个虚拟设备中；然后，通过伪随机数发生器将M个虚拟设备中的瓦片均匀映射到0，1）区间的M个等分区间；最后，根据真实设备的瓦片分布百分比将0，1）区间划分成M个区间，并将映射到各个区间的二维瓦片分布到对应的真实设备中。

2-D tiles pair of base vectors twice mapping declustering method

Aiming at the performance difference of real storage devices in object-based storage system,a 2-D tiles pair of base vectors twice mapping declustering method based on virtual device is proposed.Firstly,a group of virtual devices which have same storage performance and non-limited capacity is constructed,then the tiles are distributed into M virtual devices according to the distribution model of 2-D tiles pair of base vectors.Secondly,the tiles are equably mapped in M virtual devices into M equidis tant int...