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Line 1: {{copyedit\|date=June 2015}} Categories of [[search engine]] software include web search or full-text search (e.g., [[Lucene]]), database or structured data search such as [[Diesel point]], and mixed or [[enterprise search]] like [[Google Search Appliance]]. The largest online directories, such as [[Google]] and [[Yahoo!]], utilize hundreds of thousands of computers to process billions of website documents, ~~returning~~then return results for thousands of searches per second. Processing high volumes of queries requires software to run in a highly distributed environment with a high degree of redundancy. === Modern search engine components: ===

Database search engine: Difference between revisions