From mboxrd@z Thu Jan 1 00:00:00 1970 From: Miles Fidelman Subject: Re: possibly silly question (raid failover) Date: Tue, 01 Nov 2011 09:02:52 -0400 Message-ID: <4EAFEDFC.8090001@meetinghouse.net> References: <4EAF3F78.5060900@meetinghouse.net> <20111101092659.GA12805@vault> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <20111101092659.GA12805@vault> Sender: linux-raid-owner@vger.kernel.org Cc: "linux-raid@vger.kernel.org" List-Id: linux-raid.ids Johannes Truschnigg wrote: > Hi Miles, > > On Mon, Oct 31, 2011 at 08:38:16PM -0400, Miles Fidelman wrote: >> Hi Folks, >> >> I've been exploring various ways to build a "poor man's high >> availability cluster." Currently I'm running two nodes, using raid >> on each box, running DRBD across the boxes, and running Xen virtual >> machines on top of that. >> [...] > while I do note that I don't answer your question at hand, I'm still inclined > to ask if you do know Ganeti (http://code.google.com/p/ganeti/) yet? It offers > pretty much everything you seem to want to have. Actually I do know Ganeti, and it does NOT come close to what I'm suggesting: - it supports migration but not auto-failover - DRBD is the only mechanism it provides for replicating data across nodes - which limits migration to a 2-node pair -- In theory, there is no difference between theory and practice. In practice, there is. .... Yogi Berra