From owner-freebsd-stable@FreeBSD.ORG Mon Apr 5 21:10:24 2010 Return-Path: Delivered-To: freebsd-stable@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 84B2D106566B for ; Mon, 5 Apr 2010 21:10:24 +0000 (UTC) (envelope-from gausus@gausus.net) Received: from dagobah.intersec.pl (dagobah.intersec.pl [91.192.226.10]) by mx1.freebsd.org (Postfix) with ESMTP id 3CED18FC08 for ; Mon, 5 Apr 2010 21:10:23 +0000 (UTC) Received: from localhost (localhost [127.0.0.1]) by dagobah.intersec.pl (Postfix) with ESMTP id 767C6254002; Mon, 5 Apr 2010 23:10:22 +0200 (CEST) X-Virus-Scanned: amavisd-new at intersec.pl Received: from dagobah.intersec.pl ([127.0.0.1]) by localhost (dagobah.intersec.pl [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id WVgqBsu7XgEv; Mon, 5 Apr 2010 23:10:17 +0200 (CEST) Received: from loken.local (69-dzi-33.acn.waw.pl [85.222.122.69]) by dagobah.intersec.pl (Postfix) with ESMTP id 4469C254001; Mon, 5 Apr 2010 23:10:17 +0200 (CEST) Message-ID: <4BBA51B9.6010803@gausus.net> Date: Mon, 05 Apr 2010 23:10:17 +0200 From: Maciej Jan Broniarz User-Agent: Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.6; pl; rv:1.9.1.9) Gecko/20100317 Thunderbird/3.0.4 MIME-Version: 1.0 To: jfarmer@goldsword.com References: <1209800810.33861270466947931.JavaMail.root@dagobah.intersec.pl> <4BBA05A2.40706@intertainservices.com> <4BBA1823.1090305@gausus.net> <4BBA4334.1020506@interazioni.it> <4BBA4478.7030302@gausus.net> <20100405164306.hmy4n8pvs4goc8ks@www.goldsword.com> In-Reply-To: <20100405164306.hmy4n8pvs4goc8ks@www.goldsword.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Cc: freebsd-stable@freebsd.org Subject: Re: fault tolerant web servers on freebsd X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Production branch of FreeBSD source code List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 05 Apr 2010 21:10:24 -0000 W dniu 10-04-05 22:43, jfarmer@goldsword.com pisze: > Quoting Maciej Jan Broniarz : >> W dniu 10-04-05 22:08, Tonix (Antonio Nati) pisze: >>> Maciej Jan Broniarz ha scritto: >>>> W dniu 10-04-05 17:45, Mike Jakubik pisze: >>> > > So first you have to define your workload, then define what errors you > must avoid or allow, and then define how to deal with failures, errors, > etc. > Then you can start talking about High Availability vs. level of Fault > tolerance, vs. .... Let's say i need to run a few php/sql based web sites and I would like to maintain uptime of about 99,99% per month. No matter how good the hardware - it will always fail at some time. My goal is to build a system, that can maintain that uptime. From what You say I need some level of HA system, to maintain the required uptime. So, as I've said earlier (correct me, if I'm wrong) - the setup could look something like that: - 2 web servers with carp - 2 storage servers with on-line sync mechanism running - 2 mysql servers with on-line database replication (i'm skiping power and network issues at the moment). Few people have told me about a setup with linux, drbd and heartbeat which offers them some level of HA. Has anyone tried anything similar on FreeBSD? mjb