From owner-freebsd-fs@FreeBSD.ORG Thu Jan 19 21:02:06 2012 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 5A36D1065670 for ; Thu, 19 Jan 2012 21:02:06 +0000 (UTC) (envelope-from spork@bway.net) Received: from xena.bway.net (xena.bway.net [216.220.96.26]) by mx1.freebsd.org (Postfix) with ESMTP id EEFEE8FC08 for ; Thu, 19 Jan 2012 21:02:05 +0000 (UTC) Received: (qmail 10431 invoked by uid 0); 19 Jan 2012 21:02:05 -0000 Received: from smtp.bway.net (216.220.96.25) by xena.bway.net with (DHE-RSA-AES256-SHA encrypted) SMTP; 19 Jan 2012 21:02:05 -0000 Received: (qmail 10399 invoked by uid 90); 19 Jan 2012 21:02:03 -0000 Received: from unknown (HELO ?10.3.2.40?) (spork@96.57.144.66) by smtp.bway.net with (AES128-SHA encrypted) SMTP; 19 Jan 2012 21:02:03 -0000 From: Charles Sprickman Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Date: Thu, 19 Jan 2012 16:02:03 -0500 Message-Id: <2364175B-EF98-4A0B-91C6-9D0437CBB8EA@bway.net> To: freebsd-fs@freebsd.org Mime-Version: 1.0 (Apple Message framework v1084) X-Mailer: Apple Mail (2.1084) Subject: ZIL on root pool? 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: Thu, 19 Jan 2012 21:02:06 -0000 Hello, Two quick questions about 8.2-STABLE (from early June) w/v28: Is this tidbit about adding a ZIL to a "zfs on root" pool accurate? http://astralblue.livejournal.com/371755.html The explanation makes sense, and I was able to add two Intel 320 drives in a mirror to my root pool. It worked, all seemed fine. So second question... After removing the ZIL from the pool (which generated no errors or complaints), upon rebooting I'm left with a pool that no longer seems bootable (yes, I did set bootfs back). I'm at the second(?) stage boot loader: FreeBSD/x86 boot Default: zroot:/boot/kernel/kernel boot: (that prompt does not have any options to list files, etc. like the next stage of the loader) I'm going to netboot in a bit and try importing the pool, but I also wanted to know if ZIL on a root pool is inherently a "bad" thing or not. Most of our 1U boxes are in a "everything in the root pool" config and I'm actually doing some benchmarking on this box to see if with SSD prices dropping we might want to add ZIL to some select servers. In a 1U, our options are limited, so if ZIL on a root pool is a no-go, that would be good to know now rather than later. Thanks, Charles