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| text = Content as well as all files uploaded into the system are indexed. For example, [{{fullurl:Special:Search|search=fai|fulltext=Search|profile=all}} a search for "FAI"] lists both the [[Cloning]] article as well as the [[:File:Fai poster a4.pdf|PDF file]] And the file is not listed only because of the file name, but also because of the (indexed) file content. [{{fullurl:SpecialS pecial:Search|search=ed%20roman|fulltext=Search|profile=all}} A search for "Ed Roman"] will bring up the Enterprise Java Beans Design Patterns PDF file ([{{fullurl:File:Ejbdesignpatterns.pdf|page=13}} see p. 13 where Ed Roman is mentioned].)
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== Elasticsearch for MediaWiki ==
To improve the out-of-the-box search experience with MediaWiki, you should install the [[mw:Extension:CirrusSearch]]. CirrusSearch is just a connector to the Elasticsearch engine. Thus, to use CirrusSearch, first install the [[Elasticsearch]] system (you can use [https://www.elastic.co/guide/en/elasticsearch/reference/current/setup-repositories.html the repositories for that]).
Wikitech gives some information about how WMF uses Elasticsearch at https://wikitech.wikimedia.org/wiki/Search
This system has three components: Elastica, CirrusSearch, and Elasticsearch.
