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Varnish is an HTTP accelerator designed for content-heavy dynamic web sites as well as heavily consumed APIs. In contrast to other web accelerators, such as Squid, which began life as a client-side cache, or Apache and nginx, which are primarily origin servers, Varnish was designed as an HTTP accelerator. Varnish is focused exclusively on HTTP, unlike other proxy servers that often support FTP, SMTP and other network protocols. Varnish is used by high-profile, high-traffic websites including online newspaper sites such as The New York Times, The Guardian, The Hindu, Corriere della Sera, social media and content sites such as Wikipedia, Facebook, Twitter, Vimeo, and Tumblr. Of the Top 10K sites in the web, around a tenth use the software. ==History== The project was initiated by the online branch of the Norwegian tabloid newspaper Verdens Gang. The architect and lead developer is Danish independent consultant Poul-Henning Kamp (a well-known FreeBSD core developer), with management, infrastructure and additional development originally provided by the Norwegian Linux consulting company Linpro. The support, management and development of Varnish was later spun off into a separate company, Varnish Software. Varnish is open source, available under a two-clause BSD license. Commercial support is available from Varnish Software, amongst others. Version 1.0 of Varnish was released in 2006,〔("Making Catalyst Sites Shine with Varnish", Dec. 14, 2008 )〕〔("Varnish 1.0 released", Sep. 20, 2006 )〕 Varnish 2.0 in 2008,〔("Varnish 2.0 released", Oct. 15 2008 )〕 Varnish 3.0 in 2011,〔("Varnish 3.0.0 released", Jun. 16 2011 )〕 and Varnish 4.0 in 2014.〔("Varnish 4.0.0 released", Apr. 10 2014 )〕 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Varnish (software)」の詳細全文を読む スポンサード リンク
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