From owner-freebsd-cluster Mon Nov 11 2:58:48 2002 Delivered-To: freebsd-cluster@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 719AA37B401 for ; Mon, 11 Nov 2002 02:58:46 -0800 (PST) Received: from gate.nentec.de (gate2.nentec.de [194.25.215.66]) by mx1.FreeBSD.org (Postfix) with ESMTP id 9791143E4A for ; Mon, 11 Nov 2002 02:58:44 -0800 (PST) (envelope-from sporner@nentec.de) Received: from nenny.nentec.de (root@nenny.nentec.de [153.92.64.1]) by gate.nentec.de (8.11.3/8.9.3) with ESMTP id gABAwgE12322; Mon, 11 Nov 2002 11:58:42 +0100 Received: from nentec.de (andromeda.nentec.de [153.92.64.34]) by nenny.nentec.de (8.11.3/8.11.3) with ESMTP id gABAwct01195; Mon, 11 Nov 2002 11:58:38 +0100 Message-ID: <3DCF8D5D.2080006@nentec.de> Date: Mon, 11 Nov 2002 11:58:37 +0100 From: Andy Sporner User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.2a) Gecko/20020910 X-Accept-Language: en-us, en MIME-Version: 1.0 To: Omer Faruk Sen , freebsd-cluster Subject: Re: clustering freebsd References: <20021110080857.45866.qmail@fuzuli.enderunix.org> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-Virus-Scanned: by AMaViS-perl11-milter (http://amavis.org/) Sender: owner-freebsd-cluster@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG Suddenly the list comes alive! :-) I like it! > > I want to share my experiences about HA in FreeBSD. We haven't much > choice in FreeBSD for clustering. I have read about Sporner's > (http://sporner.dyndns.org/freebsdclusters/ ) project a few days ago > but didn't set it up. It seems promising but I think it lacks file > replication? And I really want to hear from him about maturity level > of his product. First, maturity, It has been around for some time and I get downloads--but no real feedback, so I don't know how people are using it *if* they are using it. I guess no news is good news--but... No there is no file replication. That is another matter. I had been thinking about a shared scsi solution. There is a way to query which node is running master. Since there are transition scripts that are run when a node leaves or joins. it is possible to say "if I am now monitor mount filesystem as native UFS, otherwise mount from NFS". This is less then elegant solution to the problem but short of a lock manager and clustered filesytem there is not another way. As for access, one can use the transition scripts to "ifconfig add ...." to add an ip alias. We are lucky with FreeBSD that they do a gratuitous arp when an address is configured. I would be eager to see a HA apache application running. I had thought about writting a white paper on the subject, but time being what it is--it's hard. I am currently working on a load balancing switch for a commercial firm that handles most all of the concerns around access failover (it runs FreeBSD and my HA software). Please let me know what the experiences are with the software. Then I would feel better about spending more development time on it... Thanks! Andy To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-cluster" in the body of the message