Jeff I have two node cluster only because my storage array only supports two nodes, can I add a third node without it having access to the storage? I am using CLVM to run domU's.
Jeff Sturm wrote: > > For what it's worth, considerations like these have caused us to > abandon any efforts to build a 2-node cluster. > > >From this point forward all our RHCS deployments will have a minimum > of 3 nodes, even if the 3rd node is a small node that provides no > resources and only exists for arbitration purposes. (It was going to > be that, or a quorum disk for our application, but we have no > experience running a quorum disk over the long-haul in a production > envrironment.) > > Hope this helps someone. > > > -----Original Message----- > > From: [EMAIL PROTECTED] > > [mailto:[EMAIL PROTECTED] On Behalf Of Chen, > > Mockey (NSN - CN/Cheng Du) > > Sent: Thursday, October 23, 2008 10:36 PM > > To: linux clustering > > Subject: RE: [Linux-cluster] Two nodes cluster issue without > > sharedstorageissue > > > > > > > > >-----Original Message----- > > >From: [EMAIL PROTECTED] > > >[mailto:[EMAIL PROTECTED] On Behalf Of ext Lon > > >Hohberger > > >Sent: 2008年10月24日 0:02 > > >To: linux clustering > > >Subject: Re: [Linux-cluster] Two nodes cluster issue without shared > > >storageissue > > > > > >On Thu, 2008-10-16 at 17:10 +0800, Chen, Mockey (NSN - CN/Cheng Du) > > >wrote: > > >> Hi, > > >> > > >> I want to set up a two node cluster, I use active/standby > > >mode to run > > >> my service. I need even one node's hardware failure such as > > >power cut, > > >> another node still can handover from failure node and the > > >provide the > > >> service. > > >> > > >> In my environment, I have no shared storage, so I can not > > use quorum > > >> disk. Is there any other way to implement it? I searched and found > > >> 'tiebreaker IP' may feed my request, but I can not found any > > >hints on > > >> how to configure it ? > > > > > >Since you have no shared data, you may be able to run > > without fencing. > > > > > >That should be pretty straightforward, but you might need to comment > > >out the "fenced" startup from the cman init script. > > > > > >In this case, the worst that will happen is both nodes will end up > > >running the service at the same time in the event of a network > > >partition. > > > > > >The other down side is that if the cluster divides into two > > partitions > > >and later merges back into one partition, I don't think > > certain things > > >will work right; you will need to detect this event and > > reboot one of > > >the nodes. > > > > > >-- Lon > > > > I know such defects in two node cluster. > > Since our service is mission critical, I want to know how to > > avoid such failure case ? > > > > Thanks. > > > > > > > > -- > > Linux-cluster mailing list > > [email protected] > > https://www.redhat.com/mailman/listinfo/linux-cluster > > > > > > -- > Linux-cluster mailing list > [email protected] > https://www.redhat.com/mailman/listinfo/linux-cluster > -- Rodrique Heron
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