From owner-freebsd-stable@FreeBSD.ORG Mon Apr 5 20:13:50 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 82A591065673 for ; Mon, 5 Apr 2010 20:13:50 +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 3B1908FC19 for ; Mon, 5 Apr 2010 20:13:49 +0000 (UTC) Received: from localhost (localhost [127.0.0.1]) by dagobah.intersec.pl (Postfix) with ESMTP id 9A489254002; Mon, 5 Apr 2010 22:13:48 +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 WcCP9580PGg4; Mon, 5 Apr 2010 22:13:43 +0200 (CEST) Received: from loken.local (69-dzi-33.acn.waw.pl [85.222.122.69]) by dagobah.intersec.pl (Postfix) with ESMTP id C5101254001; Mon, 5 Apr 2010 22:13:43 +0200 (CEST) Message-ID: <4BBA4478.7030302@gausus.net> Date: Mon, 05 Apr 2010 22:13:44 +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: "Tonix (Antonio Nati)" References: <1209800810.33861270466947931.JavaMail.root@dagobah.intersec.pl> <4BBA05A2.40706@intertainservices.com> <4BBA1823.1090305@gausus.net> <4BBA4334.1020506@interazioni.it> In-Reply-To: <4BBA4334.1020506@interazioni.it> 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 20:13:50 -0000 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: > > Just to use exact words, fault toulerancy is not possible with any > FreeBSD/Linux O.S. > F.T. means outage can occur in every moment, but all current operation > will be always completed by other equipments; so there will not be > interrupted/lost operations. Hmm. Thanks for the tip. Which *NIX os can be used to build an FT solution then? Solaris? AIX? HP-UX? > Carp is fine for HA is you have always both db and file storage always > available. > For DB you can use MySQL replica, cross-replicating local MySQL data > among all servers. Each server will keep its own copy, always up to date > with other servers. > This will make all DB data always available, except data recorded in the > last milliseconds. > > About file storage, you must have an external reliable NFS server. So, to be redundant one should run 2 x web servers + 2 x storage +2 x mysql. Sounds like fun, but also like a lot of work. So how do the web hosting prividers manage to use FreeBSD for theirs solution? I am curious do they have a cluster/reudndant solution for every part of the system, or they just accept thet something will fail at some time. Best regards, mjb