针对分布式并行数据库系统DPDBS中数据库副本数、数据库分布等信息的动态性，提出全局数据目录的动态管理和维护算法。
Aiming at the dynamic characteristic of the data directory in distributed and parallel database system (DPDBS), the dynamic arithmetic for whole data directory is put forward.
针对分布式并行数据库系统DPDBS中数据库副本数、数据库分布等信息的动态性，提出全局数据目录的动态管理和维护算法。
Aiming at the dynamic characteristic of the data directory in distributed and parallel database system (DPDBS), the dynamic arithmetic for whole data directory is put forward.
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