Site-based Web Crawler is crawlers using site as its basic unit. In this paper, we will discuss its character and performance. We will also introduce some systems.

• 基于站点的采集器是一类有针对性的采集器,它以站点作为采集的单位。本文在总结以往工作的基础上,首先说明站点采集自身的特点,然后讨论如何提高其性能,最后是实际的系统介绍和展望。