01777nas a2200145   4500008004100000245004300041210004100084260001700125300001000142520130900152100002101461700002601482700002801508856009501536       2009                        eng d00aDate - based dynamic caching mechanism0 aDate based dynamic caching mechanism  cJune 18 - 20  a67-743 aNews portals based on the RSS protocol are becoming nowadays one of the dominant ways that Internet users follow in order to locate the information they are looking for. Search engines, which operate at the back-end of a big portion of these web sites, receive millions of queries per day on any and every walk of web life. While these queries are submitted by thousands of unrelated users, studies have shown that small sets of popular queries account for a significant fraction of the query stream. A second truth has to do with the high frequency that a particular user tends to submit the same or highly relative search requests to the engine. By combining these facts, in this paper, we design and analyze the caching algorithm deployed in our personalized RSS portal, a web-based mechanism for the retrieval, processing and presentation in a personalized view of articles and RSS feeds collected from major Internet news portals. By using moderate amounts of memory and little computational overhead, we achieve to cache query results in the server, both for personalized and non-personalized user searches. Our caching algorithm operates not in a stand-alone manner but it co-operates and binds with the rest of the modules of our Portal in order to accomplish maximum integration with the system.1 aBouras, Christos1 aPoulopoulos, Vassilis1 aSilintziris, Panagiotis  uhttps://telematics.upatras.gr/telematics/publications/date-based-dynamic-caching-mechanism