[Linux-cluster] Two nodes cluster issue without shared storageissue

[Chen, Mockey (NSN - CN/Cheng Du)]

>-----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.