From: Tanaka Akira <akr@...>
Date: 2008-12-21T23:51:15+09:00
Subject: [ruby-core:20758] Re: how is 1.9 able to handle > 1024 sockets?

In article <966599840812190418u3693a181hc594532160c7dd0f@mail.gmail.com>,
  "Roger Pack" <rogerpack2005@gmail.com> writes:

> I noticed that select in 1.9 seems to be able to handle more than
> FD_SETSIZE sockets in a select--how is it able to do that?
> Thanks!

select supports such fds on several Unixen including Linux,
NetBSD, FreeBSD, OpenBSD and HP-UX at least.

Some of them documents the behavior.

See 
http://netbsd.gw.com/cgi-bin/man-cgi?select++NetBSD-4.0
or
http://docs.hp.com/en/B2355-60105/select.2.html
for example.
-- 
Tanaka Akira