[ANN] Rainbows! 3.3.0 - Rack server for sleepy apps and slow clients


E

Eric Wong

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/
* (e-mail address removed)
* git://bogomips.org/rainbows.git

Changes:

* improved documentation all around, suggestions/comments to further
improve documentation is greatly welcome at: (e-mail address removed)

* 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!
 
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E

Eric Wong

Zbatery is an HTTP server for Rack applications on systems that either
do not support fork(), or have no memory (nor need) to run the
master/worker model. It is based on Rainbows! (which is based on
Unicorn (which is based on Mongrel)) and inherits parts of each.
Zbatery supports your choice of all the thread/fiber/event/actor-based
concurrency models and Rack middleware that Rainbows! supports (or will
ever support) in a single process.

* http://zbatery.bogomip.org/
* (e-mail address removed)
* git://bogomips.org/zbatery.git

Changes:

Like Rainbows! 3.3.0, we've added the GPLv3 to our license
(in addition to GPLv2 and Ruby terms). See Rainbows! 3.3.0
release notes and news for more infor on changes:

http://rainbows.rubyforge.org/NEWS.html
 
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E

Eric Wong

Changes:

SIGQUIT (graceful shutdown) now drops idle keepalive clients for
the concurrency models where maintaining an idle client is
relatively inexpensive: Coolio, CoolioThreadPool,
CoolioThreadSpawn, Epoll, EventMachine, XEpoll,
XEpollThreadPool, XEpollThreadSpawn.

Kgio.autopush now works properly for all multi-threaded
concurrency models (if you're using :tcp_nopush).

* http://rainbows.rubyforge.org/
* (e-mail address removed)
* git://bogomips.org/rainbows.git
 

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