From owner-freebsd-stable@FreeBSD.ORG  Tue Sep 19 09:30:27 2006
Return-Path: <owner-freebsd-stable@FreeBSD.ORG>
X-Original-To: freebsd-stable@freebsd.org
Delivered-To: freebsd-stable@freebsd.org
Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125])
	by hub.freebsd.org (Postfix) with ESMTP id 9938516A416
	for <freebsd-stable@freebsd.org>; Tue, 19 Sep 2006 09:30:27 +0000 (UTC)
	(envelope-from dom@goodforbusiness.co.uk)
Received: from mailhost.graphdata.co.uk (mailhost.graphdata.co.uk
	[195.12.22.194])
	by mx1.FreeBSD.org (Postfix) with ESMTP id 252DE43D45
	for <freebsd-stable@freebsd.org>; Tue, 19 Sep 2006 09:30:27 +0000 (GMT)
	(envelope-from dom@goodforbusiness.co.uk)
Received: from localhost (localhost [127.0.0.1])
	by mailhost.graphdata.co.uk (Postfix) with ESMTP id BD2EB11402E;
	Tue, 19 Sep 2006 10:30:24 +0100 (BST)
X-Virus-Scanned: amavisd-new at graphdata.co.uk
Received: from mailhost.graphdata.co.uk ([127.0.0.1])
	by localhost (mailhost.graphdata.co.uk [127.0.0.1]) (amavisd-new,
	port 10024)
	with ESMTP id nqXHZozPeVJJ; Tue, 19 Sep 2006 10:30:21 +0100 (BST)
Received: from [192.168.0.86] (gdc083.internal.graphdata.co.uk [192.168.0.86])
	by mailhost.graphdata.co.uk (Postfix) with ESMTP id E0896114033;
	Tue, 19 Sep 2006 10:30:21 +0100 (BST)
Message-ID: <450FB8AF.7040700@goodforbusiness.co.uk>
Date: Tue, 19 Sep 2006 10:30:23 +0100
From: Dominic Marks <dom@goodforbusiness.co.uk>
User-Agent: Thunderbird 1.5.0.5 (X11/20060809)
MIME-Version: 1.0
To: Dominik Zalewski <dzalewski@open-craft.com>
References: <450F8777.7080407@gmail.com>
	<20060919083955.GB87657@e-Gitt.NET>	<450FAF42.50401@goodforbusiness.co.uk>
	<200609191216.24457.dzalewski@open-craft.com>
In-Reply-To: <200609191216.24457.dzalewski@open-craft.com>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Content-Transfer-Encoding: 7bit
Cc: freebsd-stable@freebsd.org
Subject: Re: bind round robin
X-BeenThere: freebsd-stable@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: Production branch of FreeBSD source code <freebsd-stable.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-stable>, 
	<mailto:freebsd-stable-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-stable>
List-Post: <mailto:freebsd-stable@freebsd.org>
List-Help: <mailto:freebsd-stable-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-stable>,
	<mailto:freebsd-stable-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Tue, 19 Sep 2006 09:30:27 -0000

 From the original message:

[1]
>>>>
>>>> www        IN A   10.10.10.10
>>>> www        IN A   192.168.0.10
>>>>

> 
> From pen homepage:
> 
> "This is pen, a load balancer for "simple" tcp based protocols such as http or 
> smtp."
> 
> As I know DNS uses both tcp and udp protocols.

 From the posters excerpt it looks like they are looking to load balance 
HTTP. [1]

> For failover you can try OpenBSD Packet Filter with CARP protocol. PF can do 
> load-balacing using different algorithms also. CARP is ported to FreeBSD. 
> More info on: http://pf4freebsd.love2party.net/carp.html

Also true. Last time I looked at this however there was a big disclaimer 
saying that
CARP's load balancing was likely to give a distorted distribution of 
load and I don't
believe it does weighting. I believe this would also be a problem 
considering the
example in [1]:

 From carp(4):

      Note: ARP balancing only works on the local network segment.  It 
cannot
      balance traffic that crosses a router, because the router itself will
      always be balanced to the same virtual host.

Cheers,
Dominic