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From: Eric Wong on 29 May 2010 02:59
Rainbows! is an HTTP server for sleepy Rack applications. It is based on
Unicorn, but designed to handle applications that expect long
request/response times and/or slow clients. For Rack applications not
heavily bound by slow external network dependencies, consider Unicorn
instead as it simpler and easier to debug.

Of course, if you find Unicorn too mainstream these days, then give
Rainbows! a try! It's the bestest web server (EVAR) with a bang in its
name!

* http://rainbows.rubyforge.org/
* rainbows-talk(a)rubyforge.org
* git://git.bogomips.org/rainbows.git

Changes:

In our race to have more concurrency options than real sites
using this server, we've added two new and fully supported
concurrency models: WriterThreadSpawn and WriterThreadPool

They're both designed for serving large static files and work
best with IO.copy_stream (sendfile!) under Ruby 1.9. They may
also be used to dynamically generate long running, streaming
responses after headers are sent (use "proxy_buffering off" with
nginx).

Unlike most concurrency options in Rainbows!, these are designed
to run behind nginx (or haproxy if you don't support POST/PUT
requests) and are vulnerable to slow client denial of service
attacks.

I floated the idea of doing something along these lines back in
the early days of Unicorn, but deemed it too dangerous for some
applications. But nothing is too dangerous for Rainbows! So
here they are now for your experimentation.

--
Eric Wong

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