From owner-freebsd-stable@freebsd.org Fri Jun 3 15:13:23 2016 Return-Path: Delivered-To: freebsd-stable@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id D1F46B69434 for ; Fri, 3 Jun 2016 15:13:23 +0000 (UTC) (envelope-from eugen@grosbein.net) Received: from mailman.ysv.freebsd.org (unknown [127.0.1.3]) by mx1.freebsd.org (Postfix) with ESMTP id BA3651E6A for ; Fri, 3 Jun 2016 15:13:23 +0000 (UTC) (envelope-from eugen@grosbein.net) Received: by mailman.ysv.freebsd.org (Postfix) id B965EB69433; Fri, 3 Jun 2016 15:13:23 +0000 (UTC) Delivered-To: stable@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id B911AB69432 for ; Fri, 3 Jun 2016 15:13:23 +0000 (UTC) (envelope-from eugen@grosbein.net) Received: from hz.grosbein.net (hz.grosbein.net [78.47.246.247]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client CN "hz.grosbein.net", Issuer "hz.grosbein.net" (not verified)) by mx1.freebsd.org (Postfix) with ESMTPS id 53B4D1E67 for ; Fri, 3 Jun 2016 15:13:22 +0000 (UTC) (envelope-from eugen@grosbein.net) Received: from eg.sd.rdtc.ru (root@eg.sd.rdtc.ru [62.231.161.221]) by hz.grosbein.net (8.14.9/8.14.9) with ESMTP id u53FD969033596 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NOT); Fri, 3 Jun 2016 17:13:11 +0200 (CEST) (envelope-from eugen@grosbein.net) X-Envelope-From: eugen@grosbein.net X-Envelope-To: peter@rulingia.com Received: from [10.58.0.10] (dadvw [10.58.0.10]) by eg.sd.rdtc.ru (8.15.2/8.15.2) with ESMTPS id u53FCxGB072386 (version=TLSv1.2 cipher=DHE-RSA-AES128-SHA bits=128 verify=NOT); Fri, 3 Jun 2016 22:12:59 +0700 (KRAT) (envelope-from eugen@grosbein.net) Subject: Re: HAST, zfs and local mirroring To: Peter Jeremy References: <20160601132300.GA75625@zxy.spb.ru> <574FDC63.6090100@norma.perm.ru> <20160602194856.GA84753@server.rulingia.com> Cc: stable@freebsd.org From: Eugene Grosbein Message-ID: <57519E77.7060507@grosbein.net> Date: Fri, 3 Jun 2016 22:12:55 +0700 User-Agent: Mozilla/5.0 (Windows NT 6.3; WOW64; rv:38.0) Gecko/20100101 Thunderbird/38.7.2 MIME-Version: 1.0 In-Reply-To: <20160602194856.GA84753@server.rulingia.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Status: No, score=0.3 required=5.0 tests=BAYES_00,LOCAL_FROM autolearn=no version=3.3.2 X-Spam-Report: * -2.3 BAYES_00 BODY: Bayes spam probability is 0 to 1% * [score: 0.0000] * 2.6 LOCAL_FROM From my domains X-Spam-Checker-Version: SpamAssassin 3.3.2 (2011-06-06) on hz.grosbein.net X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.22 Precedence: list List-Id: Production branch of FreeBSD source code List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 03 Jun 2016 15:13:23 -0000 03.06.2016 2:48, Peter Jeremy пишет: > On 2016-Jun-02 12:12:35 +0500, "Eugene M. Zheganin" wrote: >> differs a lot ? And why should I prefere this overcomplicated scheme >> over the geom_mirror, which seems rather simple when comparing. Seems >> like I can point HAST to /dev/mirror/whatever device, right ? > > Because using RAID of any sort under ZFS defeats a lot of the smarts > in ZFS. In particular, you can no longer rely on scrub verifying that > all your media content is valid. I've also had bad experiences with > gmirror volumes silently getting out of sync on a crash. gmirror or (gmirror+gjournal) ones?