From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mx1.redhat.com (ext-mx02.extmail.prod.ext.phx2.redhat.com [10.5.110.6]) by int-mx01.intmail.prod.int.phx2.redhat.com (8.13.8/8.13.8) with ESMTP id n9NISZQV021582 for ; Fri, 23 Oct 2009 14:28:35 -0400 Received: from mailstore01.fastname.no (mailstore01.fastname.no [85.19.150.220]) by mx1.redhat.com (8.13.8/8.13.8) with ESMTP id n9NISN0i022316 for ; Fri, 23 Oct 2009 14:28:24 -0400 Received: from [209.85.218.214] (helo=mail-bw0-f214.google.com) by mailstore01.fastname.no with esmtpsa (TLSv1:RC4-MD5:128) (Exim 4.69) (envelope-from ) id 1N1Os8-0004wA-Am for linux-lvm@redhat.com; Fri, 23 Oct 2009 20:28:20 +0200 Received: by bwz6 with SMTP id 6so1118274bwz.11 for ; Fri, 23 Oct 2009 11:28:19 -0700 (PDT) MIME-Version: 1.0 In-Reply-To: <20091023172914.GA12748@us.ibm.com> References: <4AE1B9FB.504@mortent.org> <20091023172914.GA12748@us.ibm.com> Date: Fri, 23 Oct 2009 20:28:19 +0200 Message-ID: <1958a88d0910231128x2b072b48q504d56b03da39196@mail.gmail.com> Subject: Re: [linux-lvm] Mirrored LVs From: Morten Torstensen Reply-To: LVM general discussion and development List-Id: LVM general discussion and development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , List-Id: Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: LVM general discussion and development >> Why cannot the mirrorlog be stored persistently in one or more LEs in >> the LV? Why the need for a seperate PV for this? > > For better redundancy... In a LE it would be mirrored too and a copy would be in each mirror... > Use "--alloc anywhere" to place the log LV on one of them when you > create your mirror. Yes, but this will have the side effect of not ensuring separate PVs for the mirrored LV? An the mirror log would still not be mirrored, so in a failure situation you would still face data loss or force a fully resync of the mirror. -- //Morten //morten@mortent.org