最好将本地数据库看作是远程数据库，将客户端实例与服务器实例分离开来，从而简化维护并提高灵活性。
It is better to treat the local database just as a remote to decouple the client instance from the server instance for easier maintenance and increased flexibility.
连接器许可证需要解析每个数据库，软件可能需要在很多远程服务器上安装和维护，以访问必需的数据库。
A connector license is required for each database to be parsed and the software may be required to be installed and maintained on a number of remote servers to access the required databases.
保护服务器(ptserver)—负责维护保护数据库(PDB)，此数据库建立了用户或组名称与其内部的数值的AFS标识符之间的映射。
Protection server (ptserver) - Maintains protection database (PDB) that maps between user or group names and their internal numerical AFS identifiers.
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