From mboxrd@z Thu Jan 1 00:00:00 1970 From: David McBride Subject: Re: OSD per disk. Date: Mon, 28 May 2012 14:56:54 +0100 Message-ID: <1338213414.9733.1.camel@squire.doc.ic.ac.uk> References: Mime-Version: 1.0 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 7bit Return-path: Received: from smtp1.cc.ic.ac.uk ([155.198.5.155]:59742 "EHLO smtp1.cc.ic.ac.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751899Ab2E1O31 (ORCPT ); Mon, 28 May 2012 10:29:27 -0400 In-Reply-To: Sender: ceph-devel-owner@vger.kernel.org List-ID: To: chandrashekhar Cc: ceph-devel@vger.kernel.org On Mon, 2012-05-28 at 06:19 +0000, chandrashekhar wrote: > I want to setup a ceph cluster with 4 osds ( one OSD per disk), 2 mons, 1 > mds. Please help me to configure this. You almost certainly do not want to have 2 MON nodes in your cluster; an odd number of nodes is strongly recommended. (Reason: a strict majority of MON odes must be up and functional to maintain quorum; increasing the number of MONs from 1 to 2 makes failures more likely but does not increase resiliency.) Cheers, David -- David McBride Department of Computing, Imperial College, London