Unicorn (web server)

From Wikipedia, the free encyclopedia
Jump to navigation Jump to search
Unicorn
Original author(s)Eric Wong
Developer(s)Unicorn developers
Initial releaseMarch 11, 2009; 10 years ago (2009-03-11)
Stable release
5.5.0 / March 4, 2019; 8 months ago (2019-03-04)
Repositoryhttps://bogomips.org/unicorn.git
Written inRuby
Operating systemCross-platform
Available inEnglish
TypeWeb server
LicenseGPLv2+
Websitebogomips.org/unicorn/ Edit this at Wikidata

Unicorn is a Rack HTTP server to serve Ruby web applications on UNIX environment. It is optimised to be used with nginx. It is based on now deprecated Mongrel 1.1.5 from 2008.

Architecture[edit]

Unicorn uses a master/worker architecture, where a master process forks to worker processes and control them. The application runs in a single thread.[1]

Reception and use[edit]

Unicorn was considered as “one of the most popular servers for Rails”.[2][1]

Twitter starts to test Unicorn in 2010.[3]

This server is shipped with Discourse. Their system administration expert Sam Saffron noted Unicorn was reliable, as it reaps unresponsive workers.[4] GitLab also uses Unicorn.[5]

Unicorn inspired other projects like Gunicorn, a fork to run Python applications.

As of 2018, projects tend to favour Puma[citation needed]. The Heroku hosting provider recommends since 2015 to migrate from Unicorn to Puma.[6]. Deliveroo published a benchmark comparing the two servers and concluded “Puma performs better than Unicorn in all tests that were either heavily IO-bound or that interleaved IO and CPU work”, but that Unicorn was still slightly better performing in pure CPU situations.[7]

References[edit]

  1. ^ a b Fulton, Hal; Arko, André (11 February 2015). The Ruby Way: Solutions and Techniques in Ruby Programming. Addison-Wesley Professional. p. 566. ISBN 978-0321714633.
  2. ^ Bylina, H.N. (2014). Ruby Programming Language. Ruby on Rails framework (PDF). XX International conference for students and young scientists «MODERN TECHNIQUE AND TECHNOLOGIES». Tomsk: IOP Publishing.
  3. ^ "Unicorn Power". 30 March 2010.
  4. ^ "Why did you move to runit + Unicorn". February 2015.
  5. ^ "How GitLab uses Unicorn and unicorn-worker-killer". GitLab. 5 June 2015. Retrieved 14 April 2018.
  6. ^ "Puma is Now the Recommended Ruby Webserver". 23 January 2015.
  7. ^ Pavese, Tommaso (21 December 2016). "Unicorn vs Puma: Rails server benchmarks".

External links[edit]