From: Eric Wong <normalperson@...>
Date: 2011-05-17T07:18:06+09:00
Subject: [ANN] Rainbows! 3.3.0 - Rack server for sleepy apps and slow clients

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.

* http://rainbows.rubyforge.org/
* rainbows-talk@rubyforge.org
* git://bogomips.org/rainbows.git

Changes:

* improved documentation all around, suggestions/comments to further
  improve documentation is greatly welcome at: rainbows-talk@rubyforge.org

* added GPLv3 option to the license (now (Ruby|GPLv2|GPLv3), though
  Unicorn is still (Ruby|GPLv2) for now)

* added client_header_buffer_size config directive (default 1K)

* small default header buffer size (16K => 1K) to reduce memory usage,
  Rails apps with cookie sessions may want to increase this (~2K)

* all concurrency models default to 50 connections per process

* all concurrency models with a secondary :pool_size parameter also
  default to 50 (threads/fibers/whatever)

* RLIMIT_NOFILE and RLIMIT_NPROC are automatically increased if needed

* Rainbows::ThreadTimeout middleware rewritten, still not recommended,
  lazy people should be using Unicorn anyways :)

* Several experimental Linux-only edge-triggered epoll options:
  XEpollThreadSpawn, XEpollThreadPool, XEpoll, and Epoll.
  The latter two were in previous releases but never announced.
  These require the "sleepy_penguin", "raindrops", and "sendfile" RubyGems

=== Deprecations

* Rainbows::Fiber::IO* APIs all deprecated, Rainbows! will avoid
  having any concurrency model-specific APIs in the future and
  also avoid introducing new APIs for applications.

* Fiber-based concurrency models are no longer recommended, they're
  too fragile for most apps, use at your own risk (they'll continue to
  be supported, however).  Linux NPTL + Ruby 1.9 is pretty lightweight
  and will be even lighter in Ruby 1.9.3 if you're careful with stack
  usage in your C extensions.

Enjoy!

-- 
Eric Wong