From: Eric Wong <normalperson@yhbt.net>
To: unicorn list <mongrel-unicorn@rubyforge.org>
Subject: Re: Using HTTP/1.1 and permanent connections
Date: Fri, 16 Apr 2010 13:09:18 -0700 [thread overview]
Message-ID: <20100416200918.GA10256@dcvr.yhbt.net> (raw)
In-Reply-To: <r2hcc1f582e1004161149ja4187a68k7867f794aeed8d7f@mail.gmail.com>
Iñaki Baz Castillo <ibc@aliax.net> wrote:
> Hi, I know that Unicorn forces TCP disconnection as it's explained at
> the top of lib/unicorn/http_response.rb:
>
> # A design decision was made to force the client to not pipeline or
> # keepalive requests. HTTP/1.1 pipelining really kills the
> # performance due to how it has to be handled and how unclear the
> # standard is. To fix this the HttpResponse always gives a
> # "Connection: close" header which forces the client to close right
> # away. The bonus for this is that it gives a pretty nice speed boost
> # to most clients since they can close their connection immediately.
>
>
> However I want to try TCP permanent connections from the client (or a
> proxy) to Unicorn. I've tryed to modify same file as above by changing
> at the end:
<snip>
> But of course this is not enough and it fails. Not sure what exactly
> happens, it seems that a Unicorn worker doesn't process requests
> anymore until replying the first response.
>
> So I would like to know if it's feasible to make Unicorn work in
> persistent mode.
> NOTE: I already know that the current design is really good, better
> than using persistent connections, but I want to experiment with
> persistent connections for other purposes I will explain in a future.
Hi Iñaki,
Unicorn won't try to read further requests from the socket (see
process_client() in lib/unicorn.rb).
However, you can use Rainbows! without specifying a concurrency model at
all (or "use :Base"). That way you'll get proper HTTP/1.1 keepalive
support and you can control keepalive_timeout:
# both of these values are the defaults for unconfigured Rainbows!
Rainbows! do
use :Base
keepalive_timeout 5
end
--
Eric Wong
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next prev parent reply other threads:[~2010-04-16 20:23 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-04-16 18:49 Using HTTP/1.1 and permanent connections Iñaki Baz Castillo
2010-04-16 20:09 ` Eric Wong [this message]
2010-04-17 22:53 ` Iñaki Baz Castillo
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