Directory Object（目录对象）其拥有者是SYS；

Directory Objects for Data Pump

Creating Directory Objects

Data Pump Export and Import Clients :Overview

Data Pump导出、导入原理：在导入、导出过程中，进程会创建一个Master Table来记录实时的导入、导出的状态信息，一旦导入、导出操作完成，这个Master Table便会被进程清除；

Database link(DBLINK)实现Source与Target之间的直接导入导出工作.

Data Pump Utility:Interfaces and Modes

• Data Pump Export and Import interfaces:
  • Command line
  • Parameter file
  • Interactive command line
  • Enterprise Manager
• Data Pump Export and Import modes:
  • Full
  • Schema
  • Table
  • Talespace
  • Transportable tablespace