Unicorn 3.4.0 - for people with very big LANs

Unicorn is an HTTP server for Rack applications designed to only serve
fast clients on low-latency, high-bandwidth connections and take
advantage of features in Unix/Unix-like kernels. Slow clients should
only be served by placing a reverse proxy capable of fully buffering
both the the request and response in between Unicorn and slow clients.


  • IPv6 support in the HTTP hostname parser and configuration
    language. Configurator syntax for “listen” addresses should
    be the same as nginx. Even though we support IPv6, we will
    never support non-LAN/localhost clients connecting to Unicorn.

  • TCP_NOPUSH/TCP_CORK is enabled by default to optimize
    for bandwidth usage and avoid unnecessary wakeups in nginx.

  • Updated KNOWN_ISSUES document for bugs in recent Ruby 1.8.7
    (RNG needs reset after fork) and nginx+sendfile()+FreeBSD 8.

  • examples/nginx.conf updated for modern stable versions of nginx.

  • “Status” in headers no longer ignored in the response,
    Rack::Lint already enforces this so we don’t duplicate
    the work.

  • All tests pass under Ruby 1.9.3dev

  • various bugfixes in the (mostly unused) ExecCGI class that
    powers http://bogomips.org/unicorn.git

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