1 = Rainbows! Unicorn for sleepy apps and slow clients
3 Rainbows! is an HTTP server for sleepy Rack applications. It is based on
4 Unicorn, but designed to handle applications that expect long
5 request/response times and/or slow clients. For Rack applications not
6 heavily bound by slow external network dependencies, consider Unicorn
7 instead as it simpler and easier to debug.
9 == \Rainbows! is about Diversity
11 We aim to support as many concurrency models as we can because they all
14 For network concurrency, models we currently support are:
16 * {RevFiberSpawn}[link:Rainbows/RevFiberSpawn.html]
17 * {Revactor}[link:Rainbows/Revactor.html]
18 * {ThreadPool}[link:Rainbows/ThreadPool.html]
19 * {Rev}[link:Rainbows/Rev.html]
20 * {ThreadSpawn}[link:Rainbows/ThreadSpawn.html]
21 * {EventMachine}[link:Rainbows/EventMachine.html]
22 * {RevThreadSpawn}[link:Rainbows/RevThreadSpawn.html]
23 * {FiberSpawn}[link:Rainbows/FiberSpawn.html]
24 * {FiberPool}[link:Rainbows/FiberPool.html]
25 * {NeverBlock}[link:Rainbows/NeverBlock.html]
26 * {RevThreadPool}[link:Rainbows/RevThreadPool.html]
28 We have {many more on the way}[link:TODO.html] for handling network
29 concurrency. Additionally, we also use multiple processes (managed by
30 Unicorn) for robustness and CPU/memory/disk concurrency.
32 We also provide Rainbows::AppPool Rack middleware for some network
33 concurrency models for limiting application concurrency independently of
38 * Designed for {Rack}[http://rack.rubyforge.org/], the standard for
39 modern Ruby HTTP applications.
41 * Built on {Unicorn}[http://unicorn.bogomips.org/], inheriting its
42 process/socket management features such as transparent upgrades and
43 Ruby configuration DSL.
45 * As with Unicorn, it is able to stream large request bodies off the
46 socket to the application while the client is still uploading. Since
47 \Rainbows! can handle slow clients, this feature is more useful than
50 * Combines heavyweight concurrency (worker processes) with lightweight
51 concurrency (Events/Fibers/Actors/Threads), allowing CPU/memory/disk to
52 be scaled independently of client connections. More concurrency models
53 (listed in the TODO) will be supported as we find time for them.
55 * We give you {lots of options}[link:Summary.html] with more
56 {on the way}[link:TODO.html].
60 \Rainbows is mainly designed for the odd things Unicorn sucks at:
62 * Web Sockets (via {Sunshowers}[http://rainbows.rubyforge.org/sunshowers/])
63 * 3rd-party APIs (to services outside your control/LAN)
64 * OpenID consumers (to providers outside your control/LAN)
65 * Reverse proxy implementations with editing/censoring
66 (to upstreams outside your control/LAN)
68 * BOSH (with slow clients)
72 * real-time upload processing (via {upr}[http://upr.bogomips.org/])
74 \Rainbows can also be used to service slow clients directly even with
79 \Rainbows! is copyright 2009 by all contributors (see logs in git).
80 It is based on Mongrel and Unicorn and carries the same license.
82 Mongrel is copyright 2007 Zed A. Shaw and contributors. It is licensed
83 under the Ruby license and the GPL2. See the included LICENSE file for
86 \Rainbows! is 100% Free Software.
90 You may download the tarball from the Rainbows project page on Rubyforge
91 and run setup.rb after unpacking it:
93 http://rubyforge.org/frs/?group_id=8977
95 You may also install it via RubyGems on Gemcutter:
101 === for Rack applications
103 In APP_ROOT (where config.ru is located), run:
107 \Rainbows! will bind to all interfaces on TCP port 8080 by default.
109 === Configuration File(s)
111 \Rainbows! will look for the config.ru file used by rackup in APP_ROOT.
113 For deployments, it can use a config file for Unicorn and
114 \Rainbows!-specific options specified by the +--config-file/-c+
115 command-line switch. \Rainbows! accepts all options found in
116 {Unicorn::Configurator}[http://unicorn.bogomips.org/Unicorn/Configurator.html]
117 as well as the "\Rainbows!" block, so you can have the following in your
120 worker_processes 4 # assuming four CPU cores
123 worker_connections 100
126 See the {Rainbows! configuration documentation}[link:Rainbows.html#M000001]
131 You can get the latest source via git from the following locations
132 (these versions may not be stable):
134 git://git.bogomips.org/rainbows.git
135 git://repo.or.cz/rainbows.git (mirror)
137 You may browse the code from the web and download the latest snapshot
140 * http://git.bogomips.org/cgit/rainbows.git (cgit)
141 * http://repo.or.cz/w/rainbows.git (gitweb)
143 Inline patches (from "git format-patch") to the mailing list are
144 preferred because they allow code review and comments in the reply to
147 We will adhere to mostly the same conventions for patch submissions as
148 git itself. See the Documentation/SubmittingPatches document
149 distributed with git on on patch submission guidelines to follow. Just
150 don't email the git mailing list or maintainer with \Rainbows! patches.
154 There is NO WARRANTY whatsoever if anything goes wrong, but let us know
155 and we'll try our best to fix it.
159 All feedback (bug reports, user/development discussion, patches, pull
160 requests) go to the mailing list/newsgroup. Patches must be sent inline
161 (git format-patch -M + git send-email). No subscription is necessary
162 to post on the mailing list. No top posting. Address replies +To:+
165 * email: mailto:rainbows-talk@rubyforge.org
166 * nntp: nntp://news.gmane.org/gmane.comp.lang.ruby.rainbows.general
167 * subscribe: http://rubyforge.org/mailman/listinfo/rainbows-talk
168 * archives: http://rubyforge.org/pipermail/rainbows-talk