NAME

Monoceros - PSGI/Plack server with event driven connection manager, preforking workers

SYNOPSIS

    % plackup -s Monoceros --max-keepalive-reqs=10000 --max-workers=2 -a app.psgi

DESCRIPTION

Monoceros is PSGI/Plack server supports HTTP/1.1. Monoceros has a event-driven connection manager and preforking workers. Monoceros can keep large amount of connection at minimal processes.

                                                          +--------+
                                                      +---+ worker |
          TCP       +---------+   UNIX DOMAIN SOCKET  |   +--------+
    --------------- | manager | ----------------------+ 
                    +---------+                       |   +--------+
    <- keepalive ->              <-- passing fds -->  `---+ worker |
                                                          +--------+

Features of Monoceros

- a manager process based on AnyEvent keeps over C10K connections

- uses IO::FDPass for passing a file descriptor to workers

- supports HTTP/1.1 and also supports HTTP/1.0 keepalive

And this server inherit Starlet. Monoceros supports following features too.

- prefork and graceful shutdown using Parallel::Prefork

- hot deploy using Server::Starter

- fast HTTP processing using HTTP::Parser::XS (optional)

- accept4(2) using Linux::Socket::Accept4 (optional)

Currently, Monoceros does not support spawn-interval and max-keepalive-reqs.

COMMAND LINE OPTIONS

In addition to the options supported by plackup, Monoceros accepts following options(s). Note, the default value of several options is different from Starlet.

--max-workers=#

number of worker processes (default: 5)

--timeout=#

seconds until timeout (default: 300)

--keepalive-timeout=#

timeout for persistent connections (default: 10)

--max-reqs-per-child=#

max. number of requests to be handled before a worker process exits (default: 1000)

--min-reqs-per-child=#

if set, randomizes the number of requests handled by a single worker process between the value and that supplied by "--max-reqs-per-chlid" (default: none)

--max-keepalive-connection=#

max, number of connections to keep in the manager process. If you want to increase this value, You should check your system limitations. (default: half number of POSIX::_SC_OPEN_MAX)

--max-readahead-reqs=#

max. number of requests to continue to read a request in a worker process. Monoceros can read a next request after the response for maximum throughput. (default: 100)

--min-readahead-reqs=#

if set, randomizes the number of requests to continue to read a request between the value and that supplied by "--max-readahead-reqs" (default: none)

--disable-keepalive

disable HTTP keepalive feature (default: enabled)

RECOMMENDED MODULES

For more performance. I recommends you to install these module.

- EV

- HTTP::Parser::XS

EXPERIMENTAL FEATURES

accept4: Linux only. If Linux::Socket::Accept4 is available, Monoceros use it. accept4(2) can do accept(2) and set SOCK_CLOEXEC|SOCK_NONBLOCK at once.
sendfile: Monoceros send IO::Handle like body with sendfile(2). Sys::Sendfile is required.

LICENSE

This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself.

AUTHOR

Masahiro Nagano <kazeburo@gmail.com>