From owner-freebsd-fs@FreeBSD.ORG Mon Aug 9 22:14:28 2010 Return-Path: Delivered-To: freebsd-fs@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id AB55B1065672 for ; Mon, 9 Aug 2010 22:14:28 +0000 (UTC) (envelope-from marco@tolstoy.tols.org) Received: from tolstoy.tols.org (tolstoy.tols.org [IPv6:2a02:898:0:20::57:1]) by mx1.freebsd.org (Postfix) with ESMTP id 47DE18FC17 for ; Mon, 9 Aug 2010 22:14:27 +0000 (UTC) Received: from tolstoy.tols.org (localhost [127.0.0.1]) by tolstoy.tols.org (8.14.4/8.14.4) with ESMTP id o79MENXb012947 for ; Mon, 9 Aug 2010 22:14:23 GMT (envelope-from marco@tolstoy.tols.org) X-Virus-Status: Clean X-Virus-Scanned: clamav-milter 0.96.1 at tolstoy.tols.org Received: (from marco@localhost) by tolstoy.tols.org (8.14.4/8.14.4/Submit) id o79MEN4m012946 for freebsd-fs@freebsd.org; Mon, 9 Aug 2010 22:14:23 GMT (envelope-from marco) Date: Mon, 9 Aug 2010 22:14:23 +0000 From: Marco van Tol To: freebsd-fs@freebsd.org Message-ID: <20100809221423.GF4964@tolstoy.tols.org> Mail-Followup-To: freebsd-fs@freebsd.org References: Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.4.2.3i X-Spam-Status: No, score=-2.9 required=5.0 tests=ALL_TRUSTED,BAYES_00 autolearn=ham version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on tolstoy.tols.org Subject: Re: Converting sysinstalled FreeBSD into ZFS-only server. X-BeenThere: freebsd-fs@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Filesystems List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 09 Aug 2010 22:14:28 -0000 On Mon, Aug 09, 2010 at 04:22:42PM -0400, Andriy Bakay wrote: > > 1. In your post you are using dedicated partition for swap. Did it provide > any advantages versus swap on ZFS volume? For this one I think the answer is that it is very common to set dumpdev in /etc/rc.conf to your swap device. Dumping core to a software raid is, uhm, suboptimal. :-) > 2. You are suggesting to set 'vm_kmem_size' value to 150% of RAM. What > pros. and cons. against following formula: > > vm_kmem_size = RAM / 2 > vfs.zfs.arc_max = vm_kmem_size - 512M > > 3. Could you be more verbose about your ZFS layout, what major advantages > it provide against for example the following: > http://wiki.freebsd.org/RootOnZFS/GPTZFSBoot. I found it very interesting > but I need more info. Me 2. Marco van Tol -- The hardest thing in the world to understand is the income tax - Albert Einstein