数据更改沿从在线处理服务器到临时服务器和报告服务器一个方向流动。
Data changes flow in one direction from the online processing server to the staging and reporting servers.
系统的滞后时间应较短：在线处理服务器的更新应迅速到达临时服务器和报告服务器。
The system should have low latency: updates at the online processing server should reach the staging and reporting servers quickly.
将门户应用程序从临时服务器移到生产服务器更加容易，因为您可以将同一url映射名称用于不同服务器上的页面。
It is easier to move the portal application from the staging server to the production server, because you can have the same URL Mapping name for a page on different servers.
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