From owner-freebsd-fs@FreeBSD.ORG Thu Oct 23 08:01:51 2003 Return-Path: Delivered-To: freebsd-fs@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id BF1AC16A4B3 for ; Thu, 23 Oct 2003 08:01:51 -0700 (PDT) Received: from perrin.nxad.com (internal.nxad.com [69.1.70.251]) by mx1.FreeBSD.org (Postfix) with ESMTP id 2FAA343FE3 for ; Thu, 23 Oct 2003 08:01:51 -0700 (PDT) (envelope-from hmp@nxad.com) Received: by perrin.nxad.com (Postfix, from userid 1072) id 5251921068; Thu, 23 Oct 2003 08:01:50 -0700 (PDT) Date: Thu, 23 Oct 2003 08:01:50 -0700 From: Hiten Pandya To: Terry Lambert Message-ID: <20031023150150.GA46202@perrin.nxad.com> References: <3F95B946.8010309@newshosting.com> <20031021233414.GJ99943@elvis.mu.org> <3F95C6F3.8030005@siscom.net> <3F96431E.A30656E3@mindspring.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <3F96431E.A30656E3@mindspring.com> X-Operating-System: FreeBSD FreeBSD 4.7-STABLE User-Agent: Mutt/1.5.4i cc: freebsd-fs@freebsd.org Subject: Re: >1 systems 1 FS X-BeenThere: freebsd-fs@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: Filesystems List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 23 Oct 2003 15:01:51 -0000 On Wed, Oct 22, 2003 at 01:43:10AM -0700, Terry Lambert wrote: : : [ ... ] : : One example of an FS that can do this is GFS, from Sistina; they : used to have an open-source version (under the GPL), but appear : to have since come to their senses. I ported all the user space : tools for GFS to FreeBSD in about 4 hours of work one night, when : it was still available under the GPL. See their propaganda at: : : http://www.sistina.com/products_gfs.htm On the other hand, you could also check out the OpenGFS project which is still being worked on actively: http://opengfs.sourceforge.net/ This is for Linux, ofcourse. : Anyway, the normal way this is handled for SAN/NAS devices is : to carve out a logical volume region on a per-machine basis, and : forget the locking altogether (giving a management node "ownership" : of the "as yet unallocated regions"), which avoid contention by : separation of the contention domain entirely. Not a very : satisfying way of doing it, if you ask me. You could also checkout another interesting file system, called Lustre, located at http://www.lustre.org/, which could probably help your need. Regards, -- Hiten Pandya hmp@FreeBSD.ORG