In this paper, we propose a new data declustering method-RCMD, which is effective for all kinds of queries.
理论分析和试验结果表明本文提出的RCMD方法优于现有的数据分布方法，具有最好的查询处理性能。
Data declustering is the foundation of the parallel processing of database query, which has significant effect on query performance.
数据分布是数据库查询并行处理的基础，良好的数据分布方法对查询性能有着重要影响。
After studying the questions of data allocation and tile declustering in heterogeneous disk systems, a same-rate virtual disk dividing method and a virtual disk sorting method are proposed.
着重讨论了异构磁盘系统的数据分配和瓦片分布问题，提出了一种速率均匀虚拟磁盘划分方法和一种虚拟磁盘排序方法。
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