中文摘要：

异地多数据库服务器数据的集中提取是数据集成、远程备份、远程恢复中的基础技术。本文分析了Power—Builder平台中的管道技术，用关键程序代码描述了基于数据管道技术所实现的单线程数据集中提取方案，并进一步提出了基于多线程并发通信技术的性能优化方案。实验表明，这些方法是有效可行的。

英文摘要：

The centralized data extraction from multiple remote database servers is the base of data integration, remote backup and remote recovery. In this paper, the data pipeline technique of the PowerBuilder platform is analyzed, and based on it, the single-threaded data integration scheme is presented by critical codes. Furthermore, based on the multi-threaded concurrent communication technique, a more efficient scheme is presented. Experiments show that these schemes are feasible and efficient.