Web search engine launched on June 1, 2009. On July 29, 2009, Yahoo! and Microsoft finalized a deal in which Yahoo! Search would be powered by Microsoft Bing technology. A search engine maintains the following processes in near real time: Web search engines get their information by web crawling from site to site. The "spider" checks for the standard filename "robots.txt", addressed to it, before sending certain information back to be indexed depending on many factors, such as the titles, page content, JavaScript, Cascading Style Sheets (CSS), headings, as evidenced by the standard HTML markup of the informational content, or its metadata in
Distributed search engine Distributed search engine A distributed search engine is a search engine where there is no central server. Unlike traditional centralized search engines, work such as crawling, data mining, indexing, and query processing is distributed among several peers in a decentralized manner where there is no single point of control. In April 2000 several programmers (including Gene Kan, Steve Waterhouse) built a prototype P2P web search engine based on Gnutella called InfraSearch. The technology was later acquired by Sun Microsystems and incorporated into the JXTA project. It was meant to run inside the participating websites' databases creating a P2P network that