From: "Jesús Gabriel y Galán" <jgabrielygalan@...>
Date: 2010-04-07T23:54:08+09:00
Subject: Re: Maximum number of sockets

On Wed, Apr 7, 2010 at 1:34 PM, Brian Candler <b.candler@pobox.com> wrote:
> Jesús Gabriel y Galán wrote:
>> Oh, ok. So this means that a ruby program cannot (or shouldn't be able
>> to) open more than 1024 sockets?
>
> Yes, unless they are handled outside of the ruby core, e.g. by
> eventmachine or Rev. But if you're going to that trouble you might as
> well use a language better suited to the job, e.g. erlang, so your idea
> of forking multiple processes makes sense.

I did this:

#!/bin/bash
for i in {1..25}
do
	ruby ./nginx_client.rb $i &
done

read
pkill -f "ruby ./nginx_client.rb"


#nginx_client.rb
require 'socket'
include Socket::Constants

id = ARGV[0] || "N/A"

sockets = []

1000.times do |i|
  socket = Socket.new(AF_INET, SOCK_STREAM, 0)
  sockaddr = Socket.pack_sockaddr_in(80, '127.0.0.1')
  socket.connect(sockaddr)
  sockets << socket
end

puts "[#{id}] All sockets connected (#{sockets.size})"
sleep

and I sucessfully managed to open 25000 sockets to the server, which
handled this really nicely taking nearly 0 cpu and only 23 MB of
memory.

Thanks,

Jesus.