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。
No bottleneck of centralized server is introduced. All data, including metadata and directory files, is dispersed into the whole system to provide high performance and scalability.
系统中没有引入集中的服务器瓶颈，所有的数据、元数据和目录文件都被分散存储在整个系统中，以提供高性能和好的可扩展性。
No bottleneck of centralized service is introduced. All data, including metadata and directory files, are distributed into the whole system to provide high performance and scalability.
系统中没有引入集中的服务器瓶颈，所有的数据、元数据和目录文件都被分散存储在整个系统中，以提供高性能和良好的可扩展性。
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