Design and implementation of web crawler based on dynamic web collection cycle

The amount of web information is increasing rapidly with advanced wireless networks and emergence of diverse smart devices like i-Phone, i-Pad and so on. The information is continuously being produced and updated in anywhere and anytime by means of easy web platforms, and social networks. Now, it is becoming a hot issue how frequently updated web data has to be refreshed in data integration and retrieval domain. In this paper, we propose dynamic web-data crawling methods, which include sensitive checking of web site changes, and dynamic retrieving of web pages from target web sites. Furthermore, we implemented a java-based web crawling application and compared performance between conventional static approaches and our proposed dynamic ones. Our experiment results showed 59% performance benefits compared to static crawling method.