[Linux-cluster] Two nodes cluster issue without sharedstorageissue

[Rodrique Heron]

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: linux-cluster-bounces at redhat.com
> > [mailto:linux-cluster-bounces at redhat.com] 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: linux-cluster-bounces at redhat.com
> > >[mailto:linux-cluster-bounces at redhat.com] 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
> > Linux-cluster at redhat.com
> > https://www.redhat.com/mailman/listinfo/linux-cluster
> >
> >
>
> --
> Linux-cluster mailing list
> Linux-cluster at redhat.com
> https://www.redhat.com/mailman/listinfo/linux-cluster
>

-- 
Rodrique Heron 


-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://listman.redhat.com/archives/linux-cluster/attachments/20081024/766be5bf/attachment.htm>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: rodrique_heron.vcf
Type: text/x-vcard
Size: 342 bytes
Desc: not available
URL: <http://listman.redhat.com/archives/linux-cluster/attachments/20081024/766be5bf/attachment.vcf>