From owner-freebsd-stable@FreeBSD.ORG Tue Mar 5 23:03:05 2013 Return-Path: Delivered-To: freebsd-stable@FreeBSD.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by hub.freebsd.org (Postfix) with ESMTP id 4274DD99; Tue, 5 Mar 2013 23:03:05 +0000 (UTC) (envelope-from daniel@digsys.bg) Received: from smtp-sofia.digsys.bg (smtp-sofia.digsys.bg [193.68.21.123]) by mx1.freebsd.org (Postfix) with ESMTP id BD98422F; Tue, 5 Mar 2013 23:03:04 +0000 (UTC) Received: from digsys200-136.pip.digsys.bg (digsys200-136.pip.digsys.bg [193.68.136.200]) (authenticated bits=0) by smtp-sofia.digsys.bg (8.14.6/8.14.6) with ESMTP id r25N2rK7058038 (version=TLSv1/SSLv3 cipher=AES128-SHA bits=128 verify=NO); Wed, 6 Mar 2013 01:02:54 +0200 (EET) (envelope-from daniel@digsys.bg) Content-Type: text/plain; charset=us-ascii Mime-Version: 1.0 (Mac OS X Mail 6.2 \(1499\)) Subject: Re: ZFS "stalls" -- and maybe we should be talking about defaults? From: Daniel Kalchev In-Reply-To: <20130305220936.GA54718@icarus.home.lan> Date: Wed, 6 Mar 2013 01:02:49 +0200 Content-Transfer-Encoding: quoted-printable Message-Id: References: <513524B2.6020600@denninger.net> <89680320E0FA4C0A99D522EA2037CE6E@multiplay.co.uk> <20130305050539.GA52821@anubis.morrow.me.uk> <20130305053249.GA38107@icarus.home.lan> <5135D275.3050500@FreeBSD.org> <20130305220936.GA54718@icarus.home.lan> To: Jeremy Chadwick X-Mailer: Apple Mail (2.1499) Cc: freebsd-stable@FreeBSD.org, Andriy Gapon X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: Production branch of FreeBSD source code List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 05 Mar 2013 23:03:05 -0000 On Mar 6, 2013, at 12:09 AM, Jeremy Chadwick wrote: > I say that knowing lots of people use ZFS-on-root, which is great -- I > just wonder how many of them have tested all the crazy scenarios and > then tried to boot from things. I have verified that ZFS-on-root works reliably in all of the following = scenarios: single disk, one mirror vdev, many mirror vdevs, raidz. = Haven't found the time to test many raidz vdevs, I admit. :) Combined with "boot environments" (that can be served many different = ways), ZFS on root is short of a miracle. ZFS on FreeBSD has some issues, mostly with huge installations and = defaults/tuning, but not really with ZFS-on-root. Of course, if for example, you follow stable, you should be prepared = with alternative boot media that supports the current zpool/zfs = versions. But this is small cost to pay. Daniel=