DETAILED STUDY OF AGGREGATOR FOR UPDATES

Nowadays, personal weblogs, news web sites, and dis cussion forums are publishing RSS feeds for their sretrieve newpostings.There has been a dramatic increase in t he use of XML data to deliver information over the Web. Everydaymillions of new articles are published and presented by RSS fee ds.Also, news feeders, newsgators are available for subscribers or the readers bythe individual sites, the news feeders regularly pull articles from theWeb sites, the aggregated eff ect by all news feeders puts anenormousload on many sites. We propose ablog aggr egator approach where a central aggregatormonitors and retrieves new postings from different data sources and subsequent ly disseminates them to the subscribersto alleviate such a problem. We study how the aggregator should monitor thedata sources t o quickly retrieve new postings using minimalresour ces and to provide its subscribers with fast news alert. Thus, this reduce s the load onthe monitored data sources by a signif icant amount.