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It's better under 1.9.3 (sleepy_penguin 3.0.1 was bogus)
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It's better under 1.9.3
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It should hopefully give this more visibility even though it's
an internal feature.
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We need to trigger a recv() to uncork the response.
This won't affect fairness (much) since all recv()s
are non-blocking and a successful header parse will
put us in the back of the queue.
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Since it's cheap to maintain keepalive clients with EM, we need
a way of disconnecting them in a timely fashion on rare SIGQUIT
events.
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This should enable Kgio "autopush" support for ThreadSpawn,
ThreadPool, XEpollThreadSpawn, and XEpollThreadPool.
(still needs tests)
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In concurrency models long keepalive times are cheap (and thus
more likely to be used), this allows Rainbows! to gracefully
shut down more quickly.
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There's less logic in the server this way and easier
to potentially share code this way.
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io_splice 4.1.1 works around issues with socket
buffers filling up pipe buffers on blocking splice.
See http://lkml.org/lkml/2009/1/13/478 for a better
explanation.
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* 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.
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I can't wait until I stop supporting Ruby 1.8
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Hopefully makes things easier to try out.
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Only needed for Ruby 1.9
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Just close the epoll descriptor, since the sleepy_penguin
epoll_wait wrapper may not return EINTR in the future.
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This allows using IO::Splice.copy_stream from the "io_splice"
RubyGem on recent Linux systems. This also allows users to
disable copy_stream usage entirely and use traditional
response_body.each calls which are compatible with all Rack
servers (to workaround bugs in IO.copy_stream under 1.9.2-p180).
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Finally, we have all methods in configurator and it's
much easier to document!
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It can't be used as middleware for fully-buffering concurrency
models.
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There's actually no reason we can't have these methods
in Rainbows::Configurator where it's easier to document
nowadays.
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CoolioThreadPool has had it supported forever, but
only NeverBlock had it documented.
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It's good to describe what they're useful for.
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It's an internal implementation detail.
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speling ficks and less confusing #initialize documentation
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We're now able to configure the number of threads independently
of worker_connections.
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coolio_thread_pool, neverblock both use it, and
xepoll_thread_pool will support it next, too.
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This is probably friendlier on server resources in the worst
case than XEpollThreadSpawn but may perform worse in the client
client-visible way, too.
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Fixed in kgio 2.4.0 now
This reverts commit a1168e7d2bfe182896f139d051ef099616fd1646.
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No need for a string comparison
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We only poll for one event (EPOLLIN/EPOLLOUT) at a time,
so there's no need to actually check since they're too
rare.
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worker_yield is safer than setting a threshold with multiple
acceptors when thread limits are hit. Also, avoid sleep +
Thread#run since it's potentially racy if threads are extremely
unfairly scheduled.
Same things applied to xepoll_thread_spawn.
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Infinite sleep is too dangerous due to possible race conditions,
so use worker_yield which is safer and cheaper in the general
case. We can also avoid sleeping on new threads by only
spawning when the client module is included.
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Otherwise pipeline_ready can false positive on us
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shorter line and 3 lines of code killed!
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Not that it's actually used, right now.
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More sharing, faster startups, and most importantly,
better error reporting if some things are missing.
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It *can* have as many threads as it does idle connections.
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We won't forget to reset defaults on SIGHUP anymore.
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Too confusing otherwise...
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We're changing our default to 1K buffers to save memory. This
should reduce memory usage of idle clients and lower pressure on
the MRI GC. Rails applications using session cookies (the
default) may want to up this to 2K or more.
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pavinging the way for changing MODEL_WORKER_CONNECTIONS
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HTTP headers are usually smaller than 4K, so 16K was way too
much for most users and often caused unnecessary GC runs.
EventMachine and Coolio models can all share the same initial
read buffer, so it's less urgent that they get this lowered for
now...
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This one actually has a realistic chance of running
hundreds/thousands of clients, and 32K per-client is
a huge amount.
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Epoll#wait and epoll_wait(2) timeouts are in milliseconds,
not seconds. This affects xepoll, too.
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Noticed under 1.8.7
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Whee! This is going to be awesome.
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They're probably ready for general use in a very limited
capacity...
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Too much NIH and too fragile.
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No need to expose things that don't need exposing.
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