From owner-freebsd-stable@FreeBSD.ORG Sat May 24 20:08:38 2008 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 27E3D106567B for ; Sat, 24 May 2008 20:08:38 +0000 (UTC) (envelope-from zbeeble@gmail.com) Received: from yw-out-2324.google.com (yw-out-2324.google.com [74.125.46.29]) by mx1.freebsd.org (Postfix) with ESMTP id E9DEC8FC15 for ; Sat, 24 May 2008 20:08:37 +0000 (UTC) (envelope-from zbeeble@gmail.com) Received: by yw-out-2324.google.com with SMTP id 9so779813ywe.13 for ; Sat, 24 May 2008 13:08:28 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:received:received:message-id:date:from:to:subject:cc:in-reply-to:mime-version:content-type:references; bh=7FfyB4umLsUjlzcbftckevKxfe+O96nD6pdWUMjHZvU=; b=ab1T0+ZWKVX4/42KQUiEQHL3JGp0B66YcPtgbY9ChpBpwqr2tqiNNK3IUApVBnp0RyPp+OehkuN8FKvrgbeo57NqA5aSuT7JQtTlGpf4ItzXAT9TazWAM/P8rS/ri42YTeTkvIhrgZGsevWc+v9RjhMY3VTF6d/4zFUrXA/DH/k= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=message-id:date:from:to:subject:cc:in-reply-to:mime-version:content-type:references; b=q+pVG1UMfQdKM/N/GGPtY9RTIOVsw+93YlXeCW8D95+a1+ncny8sxfHhzRSxnjayH+0Wky6lAfBpSpsVAmXeB/nOb9GjingE6zqeWhswS6QnO0/Vmu1lqFx2fNH0QzzUD564Os0rSYvs75tHmBc0F58dFARrnsPR1sriQgHjWRs= Received: by 10.150.69.41 with SMTP id r41mr685376yba.52.1211659708696; Sat, 24 May 2008 13:08:28 -0700 (PDT) Received: by 10.150.12.12 with HTTP; Sat, 24 May 2008 13:08:28 -0700 (PDT) Message-ID: <5f67a8c40805241308s15c98737w29bd66c0273bfe95@mail.gmail.com> Date: Sat, 24 May 2008 16:08:28 -0400 From: "Zaphod Beeblebrox" To: "Andrew Hill" In-Reply-To: <16a6ef710805240926t3b4f631bja349fed8df6785ff@mail.gmail.com> MIME-Version: 1.0 References: <16a6ef710805240926t3b4f631bja349fed8df6785ff@mail.gmail.com> Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Content-Disposition: inline X-Content-Filtered-By: Mailman/MimeDel 2.1.5 Cc: freebsd-stable@freebsd.org, Arnaud Houdelette Subject: Re: ZFS on root and disk write caching. 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: Sat, 24 May 2008 20:08:38 -0000 On Sat, May 24, 2008 at 12:26 PM, Andrew Hill wrote: > but what struck me as odd is the desire to create two separate zpools - one > for data storage and one for the system. i think one of zfs's greatest > strengths is the abstraction/separation between disks and filesystems. There are a few reasons to consider more than one zpool. One is performance. Another is the ability to boot from it (AFAIK, you can only boot from mirror'd pools). The ZFS abstraction is cool --- but it's not magic.