From owner-freebsd-fs@freebsd.org Mon Jul 4 12:57:13 2016 Return-Path: Delivered-To: freebsd-fs@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 B7BF7B91665 for ; Mon, 4 Jul 2016 12:57:13 +0000 (UTC) (envelope-from ben.rubson@gmail.com) Received: from mail-wm0-x22b.google.com (mail-wm0-x22b.google.com [IPv6:2a00:1450:400c:c09::22b]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (Client CN "smtp.gmail.com", Issuer "Google Internet Authority G2" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 5C0BE2D02 for ; Mon, 4 Jul 2016 12:57:13 +0000 (UTC) (envelope-from ben.rubson@gmail.com) Received: by mail-wm0-x22b.google.com with SMTP id z126so41024925wme.0 for ; Mon, 04 Jul 2016 05:57:13 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:subject:from:in-reply-to:date :content-transfer-encoding:message-id:references:to; bh=gZUY3Xqnd6tMBScsGpijAwCqyW0+gS1z4HO/3iYGlCA=; b=ats1/eHdEWpJVIrnKoCZ/THzonH6kYV2j5eepfrHgHDFdBIf71lTseDKQ5bE1H88qV hZJ0ZcGC/Ejac3IARpL2+PMEy8nhNkVw95BSHiELWoP1w7ktQ8fdVlJ3Vcu8pcclPVuB THAg+wnbjC+gWHru4XBv34QVE5OlxWJt18RryWI8Zzr9mhCpyZ8pkEV2ZSPzCFKC/lRc pb1Bwo0bjPgoGIMkVZH2aezuwRnRzNNDYy/gHGIORhS8fyU2iaLduEZ65EomQIDyVwem c2rAWdS61lsetd3qX6IuMxOpC9uKAm2TmphC5LHVywA3teBDSM1nr9djI4H2LNc8TSsT 2Ojg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:mime-version:subject:from:in-reply-to:date :content-transfer-encoding:message-id:references:to; bh=gZUY3Xqnd6tMBScsGpijAwCqyW0+gS1z4HO/3iYGlCA=; b=G78kqfPeHIM90nZx4MizNBkhIGO/XlG6OyImIM6GRl6gq55ozwqdFc4VEU+BZNrZfL w+ryqq1ME/HRnIMuS8eto5ebfCX+y8O7vok3G9eC1xtDiV3HsgRXxPydUHl8wDCYx49e UN3XciN3xZ9IkjRDMkIkJ9VsW/91TUucG8syBCV931HLlSu868LjAfqYhRYhs110jN/6 p+gJVytzXsev4iiNd0DWW6Fmpe6GPcSCPHKD+sEjLwLBUktCkfpmebVQ1cIFWgBpm0d+ Dc47CgQqnDbgHpGbmlgD3lzCaSsidniK3GRY7FGYy2hd8Gr3NUY78c+dfRWcI8rVDpyW JYtg== X-Gm-Message-State: ALyK8tLfekLvlev3ecZTMCzZZuMumOqrq7mx3LjZjgWQOOQdeS9CwbQhk6gu4In4w8v8EQ== X-Received: by 10.194.20.132 with SMTP id n4mr5751676wje.12.1467637031657; Mon, 04 Jul 2016 05:57:11 -0700 (PDT) Received: from macbook-air-de-benjamin-1.home (LFbn-1-7077-85.w90-116.abo.wanadoo.fr. [90.116.246.85]) by smtp.gmail.com with ESMTPSA id o5sm1157638wjy.21.2016.07.04.05.57.10 for (version=TLS1 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Mon, 04 Jul 2016 05:57:10 -0700 (PDT) Content-Type: text/plain; charset=us-ascii Mime-Version: 1.0 (Mac OS X Mail 9.3 \(3124\)) Subject: Re: HAST + ZFS + NFS + CARP From: Ben RUBSON In-Reply-To: <577A5CE3.8060100@quip.cz> Date: Mon, 4 Jul 2016 14:57:10 +0200 Content-Transfer-Encoding: quoted-printable Message-Id: References: <20160630144546.GB99997@mordor.lan> <71b8da1e-acb2-9d4e-5d11-20695aa5274a@internetx.com> <20160630153747.GB5695@mordor.lan> <63C07474-BDD5-42AA-BF4A-85A0E04D3CC2@gmail.com> <678321AB-A9F7-4890-A8C7-E20DFDC69137@gmail.com> <20160630185701.GD5695@mordor.lan> <6035AB85-8E62-4F0A-9FA8-125B31A7A387@gmail.com> <20160704122527.GH41276@mordor.lan> <577A5CE3.8060100@quip.cz> To: freebsd-fs@freebsd.org X-Mailer: Apple Mail (2.3124) X-BeenThere: freebsd-fs@freebsd.org X-Mailman-Version: 2.1.22 Precedence: list List-Id: Filesystems List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 04 Jul 2016 12:57:13 -0000 > On 04 Jul 2016, at 14:56, Miroslav Lachman <000.fbsd@quip.cz> wrote: >=20 > Julien Cigar wrote on 07/04/2016 14:25: >=20 >> another option I had in mind is to export ZVOL through iSCSI: >> - on serverA: $> zpool create storage mirror /dev/ada1 /dev/ada2 >> - on serverB: $> zpool create storage mirror /dev/ada1 /dev/ada2 >>=20 >> create a 50G dedicated redundant storage for serverC: >> - on serverA: $> zfs create -V 50G storage/serverc >> - on serverB: $> zfs create -V 50G storage/serverc >>=20 >> iSCSI export /dev/zvol/storage/serverc from serverA and serverB and >> create a ZFS dataset on serverC: >> - on serverC: $> zpool create storage mirror /dev/ivol1 /dev/ivol2 >>=20 >> (where ivol1 is the volume from serverA and ivol2 the volume from >> serverB) >>=20 >> create, for example, a dataset for the dovecot service >> - on serverC: $> zfs create -o compress=3Dlz4 storage/dovecot >=20 > I think it will be painfully slow. ZFS on top of ZFS throught iSCSI... = too much layering, too much delays. And serverC is a SPOF.