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Octocat-spinner-32 Documentation Documentation: remove --sanitize-html for pandoc June 06, 2011
Octocat-spinner-32 bin memory reductions in worker process June 15, 2011
Octocat-spinner-32 examples examples/nginx.conf: use $scheme instead of hard-coded "https" March 20, 2012
Octocat-spinner-32 ext http: increase REQUEST_PATH maximum length to 4K April 17, 2012
Octocat-spinner-32 lib
Octocat-spinner-32 script remove Rails-oriented integration tests July 28, 2012
Octocat-spinner-32 t bind listeners after loading for preload_app users August 02, 2012
Octocat-spinner-32 test
Octocat-spinner-32 .CHANGELOG.old Remove Echoe and roll our own packaging/release... September 17, 2009
Octocat-spinner-32 .document doc: add Application Timeouts document August 24, 2011
Octocat-spinner-32 .gitignore doc: use wrongdoc for documentation December 25, 2010
Octocat-spinner-32 .mailmap Add .mailmap file for "git shortlog" and other tools September 15, 2009
Octocat-spinner-32 .wrongdoc.yml gemspec: bump wrongdoc dependency for dev August 19, 2011
Octocat-spinner-32 Application_Timeouts doc: add Application Timeouts document August 24, 2011
Octocat-spinner-32 CONTRIBUTORS doc: update CONTRIBUTORS June 17, 2010
Octocat-spinner-32 COPYING add GPLv3 option to the license August 29, 2011
Octocat-spinner-32 DESIGN doc: update doc for Ruby 2.0.0dev CoW-friendliness January 28, 2012
Octocat-spinner-32 FAQ move Rails 2.3.x test to Rails 2.3.8 June 03, 2010
Octocat-spinner-32 GIT-VERSION-GEN
Octocat-spinner-32 GNUmakefile remove Rails-oriented integration tests July 28, 2012
Octocat-spinner-32 HACKING Document the method for building the Unicorn gem. June 06, 2011
Octocat-spinner-32 ISSUES doc: add ISSUES document December 07, 2009
Octocat-spinner-32 KNOWN_ISSUES KNOWN_ISSUES: document signal conflicts in libs/apps March 20, 2012
Octocat-spinner-32 LICENSE add GPLv3 option to the license August 29, 2011
Octocat-spinner-32 Links Links: add a link to the UnXF middleware September 09, 2011
Octocat-spinner-32 PHILOSOPHY misc documentation spelling fixes April 11, 2012
Octocat-spinner-32 README add GPLv3 option to the license August 29, 2011
Octocat-spinner-32 Rakefile Rakefile: swap URL for January 08, 2012
Octocat-spinner-32 SIGNALS docs: hopefully clarify preload_app=false behavior June 10, 2010
Octocat-spinner-32 Sandbox Sandbox: update doc for latest Bundler versions April 30, 2011
Octocat-spinner-32 TODO TODO: remove scalability to >= 1024 workers item June 22, 2011
Octocat-spinner-32 TUNING misc documentation spelling fixes April 11, 2012
Octocat-spinner-32 split out isolate usage/logic October 04, 2010
Octocat-spinner-32 setup.rb "encoding: binary" comments for all sources (1.9) September 08, 2009
Octocat-spinner-32 unicorn.gemspec bump dependencies December 05, 2011
= Unicorn: Rack HTTP server for fast clients and Unix

\Unicorn is an HTTP server for Rack applications designed to only serve
fast clients on low-latency, high-bandwidth connections and take
advantage of features in Unix/Unix-like kernels.  Slow clients should
only be served by placing a reverse proxy capable of fully buffering
both the the request and response in between \Unicorn and slow clients.

== Features

* Designed for Rack, Unix, fast clients, and ease-of-debugging.  We
  cut out everything that is better supported by the operating system,
  {nginx}[] or {Rack}[].

* Compatible with both Ruby 1.8 and 1.9.  Rubinius support is in-progress.

* Process management: \Unicorn will reap and restart workers that
  die from broken apps.  There is no need to manage multiple processes
  or ports yourself.  \Unicorn can spawn and manage any number of
  worker processes you choose to scale to your backend.

* Load balancing is done entirely by the operating system kernel.
  Requests never pile up behind a busy worker process.

* Does not care if your application is thread-safe or not, workers
  all run within their own isolated address space and only serve one
  client at a time for maximum robustness.

* Supports all Rack applications, along with pre-Rack versions of
  Ruby on Rails via a Rack wrapper.

* Builtin reopening of all log files in your application via
  USR1 signal.  This allows logrotate to rotate files atomically and
  quickly via rename instead of the racy and slow copytruncate method.
  \Unicorn also takes steps to ensure multi-line log entries from one
  request all stay within the same file.

* nginx-style binary upgrades without losing connections.
  You can upgrade \Unicorn, your entire application, libraries
  and even your Ruby interpreter without dropping clients.

* before_fork and after_fork hooks in case your application
  has special needs when dealing with forked processes.  These
  should not be needed when the "preload_app" directive is
  false (the default).

* Can be used with copy-on-write-friendly memory management
  to save memory (by setting "preload_app" to true).

* Able to listen on multiple interfaces including UNIX sockets,
  each worker process can also bind to a private port via the
  after_fork hook for easy debugging.

* Simple and easy Ruby DSL for configuration.

* Decodes chunked transfers on-the-fly, thus allowing upload progress
  notification to be implemented as well as being able to tunnel
  arbitrary stream-based protocols over HTTP.

== License

\Unicorn is copyright 2009 by all contributors (see logs in git).
It is based on Mongrel 1.1.5 and carries the same license.

Mongrel is copyright 2007 Zed A. Shaw and contributors. It is
tri-licensed under (your choice) of the GPLv3, GPLv2 or Ruby-specific
terms.  See the included LICENSE file for details.

\Unicorn is 100% Free Software.

== Install

The library consists of a C extension so you'll need a C compiler
and Ruby development libraries/headers.

You may download the tarball from the Mongrel project page on Rubyforge
and run setup.rb after unpacking it:

You may also install it via RubyGems on

  gem install unicorn

You can get the latest source via git from the following locations
(these versions may not be stable):

  git:// (mirror)

You may browse the code from the web and download the latest snapshot
tarballs here:

* (cgit)
* (gitweb)

See the HACKING guide on how to contribute and build prerelease gems
from git.

== Usage

=== non-Rails Rack applications

In APP_ROOT, run:


=== for Rails applications (should work for all 1.2 or later versions)



\Unicorn will bind to all interfaces on TCP port 8080 by default.
You may use the +--listen/-l+ switch to bind to a different
address:port or a UNIX socket.

=== Configuration File(s)

\Unicorn will look for the file used by rackup in APP_ROOT.

For deployments, it can use a config file for \Unicorn-specific options
specified by the +--config-file/-c+ command-line switch.  See
Unicorn::Configurator for the syntax of the \Unicorn-specific options.
The default settings are designed for maximum out-of-the-box
compatibility with existing applications.

Most command-line options for other Rack applications (above) are also
supported.  Run `unicorn -h` or `unicorn_rails -h` to see command-line

== Disclaimer

There is NO WARRANTY whatsoever if anything goes wrong, but
{let us know}[link:ISSUES.html] and we'll try our best to fix it.

\Unicorn is designed to only serve fast clients either on the local host
or a fast LAN.  See the PHILOSOPHY and DESIGN documents for more details
regarding this.

== Contact

All feedback (bug reports, user/development dicussion, patches, pull
requests) go to the mailing list/newsgroup.  See the ISSUES document for
information on the {mailing list}[].

For the latest on \Unicorn releases, you may also finger us at or check our NEWS page (and subscribe to our Atom
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