[Linux-cluster] How to avoid two-nodes clustersplit-brain withoutshared storage

[Mockey Chen]

Thanks.

I got it after read 'man qdisk'.

The tiebreaker ip is described here.


ext jumanjiman at gmail.com wrote:
> Look up "quorum disk". You can add a heuristic based on ping or just about any other shell command. The heuristic acts like a ghost node toward quorum. 
> An actual disk is not needed.
>
> -paul
>
> Sent via BlackBerry by AT&T
>
> -----Original Message-----
> From: Mockey Chen <mockey.chen at nsn.com>
>
> Date: Mon, 09 Feb 2009 09:52:06 
> To: linux clustering<linux-cluster at redhat.com>
> Subject: Re: [Linux-cluster] How to avoid two-nodes cluster
> 	split-brain	withoutshared storage
>
>
> Hi Barry Brimer,
>
> Thanks your suggestion.
> 'tiebreaker ip', I searched the cluster documents, and only find the
> definition of 'tiebreaker ip', but there is no description on how to
> configure it.
> Could you give some more detail about how to configure it.
>
>
>
> ext Barry Brimer wrote:
>   
>> I believe you want to use the tiebreaker ip .. which should be set to
>> the default gateway.  Presumably the machine that is malfunctioning
>> would be unable to reach the gateway, while the one that is
>> functioning correctly could.
>>
>> On Sat, 7 Feb 2009, Jeff Sturm wrote:
>>
>>     
>>> We faced the same question, and decided that for reliability, it was
>>> best to add an inexpensive third node to a cluster.
>>>
>>> The third node need not run any cluster services (rgmanager, GFS, CLVM
>>> etc.) other than fencing.  This is a far lower cost than adding shared
>>> storage simply for a quorum disk.
>>>
>>>       
>>>> -----Original Message-----
>>>> From: linux-cluster-bounces at redhat.com
>>>> [mailto:linux-cluster-bounces at redhat.com] On Behalf Of Mockey Chen
>>>> Sent: Friday, February 06, 2009 3:18 AM
>>>> To: linux clustering
>>>> Subject: [Linux-cluster] How to avoid two-nodes cluster
>>>> split-brain withoutshared storage
>>>>
>>>> Hi,
>>>>
>>>> I have a two node cluster, due to design limitation, there is
>>>> no shared storage exist. So I can not use quorum disk.
>>>>
>>>> Is there any other reliable way to prevent split-brain?
>>>> I searched google, but I can not found any solution suitable
>>>> for my situation.
>>>>
>>>> Any comment is appreciated.
>>>>
>>>>
>>>> Best Regards.
>>>> Chen Ming
>>>>
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>>>> Linux-cluster mailing list
>>>> Linux-cluster at redhat.com
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>>>>
>>>>
>>>>         
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>>>       
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