From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mx3.redhat.com (mx3.redhat.com [172.16.48.32]) by int-mx1.corp.redhat.com (8.13.1/8.13.1) with ESMTP id n6REAoGu011113 for ; Mon, 27 Jul 2009 10:10:50 -0400 Received: from mail09.linbit.com (mail09.linbit.com [212.69.161.110]) by mx3.redhat.com (8.13.8/8.13.8) with ESMTP id n6REAXbX005074 for ; Mon, 27 Jul 2009 10:10:33 -0400 Received: from soda.linbit (unknown [10.9.9.55]) by mail09.linbit.com (LINBIT Mail Daemon) with ESMTP id B4C6D1018D52 for ; Mon, 27 Jul 2009 16:10:32 +0200 (CEST) Date: Mon, 27 Jul 2009 16:10:32 +0200 From: Lars Ellenberg Subject: Re: [linux-lvm] Mirroring implementation Message-ID: <20090727141032.GC8046@barkeeper1-xen.linbit> References: <29ae894c0907260312m3b2ffb2ex5cbef456f3c49bee@mail.gmail.com> <20090727135628.GA3782@us.ibm.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20090727135628.GA3782@us.ibm.com> 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: linux-lvm@redhat.com On Mon, Jul 27, 2009 at 06:56:28AM -0700, malahal@us.ibm.com wrote: > brem belguebli [brem.belguebli@gmail.com] wrote: > > Hi, > > I have a few questions concerning LVM mirror implementation, and I > > couldn't find any suitable design doc > > I need to setup a dual site ( a few miles between the 2 sites, around 1 ms > > RTD) mirror based cluster system. > > You need asynchronous mirroring (remote replication module). This is not > in mainline (not sure if included in the latest RHEL release). The > following comments apply to dm-mirror module that is already in the > mainline. There is also MD RAID1, see man mdadm, the --write-mostly and --write-behind options. And of course, DRBD http://www.drbd.org which is not RAID1 turned into replication, but a dedicated replication solution. -- : Lars Ellenberg : LINBIT | Your Way to High Availability : DRBD/HA support and consulting http://www.linbit.com