A Crawler that runs multiple processes in parallel is a parallel crawler.
It aims towards maximizing the download rate and in this process, it minimizes the overhead from parallelization to prevent repeated downloads of the same page.
The Crawling system requires a policy to avoid downloading the same page twice. The policy assigns the new URLs discovered […]

Popularity: 10% [?]

Gifted with a powerful and dynamic nature, the process of web crawling may consume a good amount of time (months or weeks). Many events such as creations, updates and deletions occur during the process of web crawling. According to a search engine, there is a cost related to not deleting an event. Freshness and age […]

Popularity: 11% [?]

A Recent study and research have proved that the largest and most efficient search engine can only cover a portion of the content that is publicly available. To sum up, no search engine indexes more than 16% of the web. Since, it has been proved that the crawler downloads just a fraction of the web […]

Popularity: 10% [?]

A Web Crawler is a program that browses the worldwide web in a typically arranged, ordered and mechanized manner. A web crawler is also popularly known as a web spider or ant.
Web crawlers create a copy of all the frequently visit sites. The copies are further used by search engine. The search engine indexes […]

Popularity: 11% [?]

Searching through an index involves a user building a query and finally submitting it through the search engine.
The query can be any thing from a simple and a single word to a couple of words together.
Complex queries involve the help of Boolean operators. Boolean operators allow the users to filter and extend the terms of […]

Popularity: 8% [?]