[Linux-cluster] Redhat without qdisk

[emmanuel segura]

If don't use the qdisk who is the master in the split-brain?

Who take the resources?

What are you concerns about fence_scsi?

fence_scsi in redhat 5.X doesn't reboot the node, the fenced node neve
release the resources

Why redhat made the qdisk as Tie-breakers and some people from support say
it's one optional or some time says is not needed?



Il giorno 12 aprile 2012 17:51, Ryan O'Hara <rohara at redhat.com> ha scritto:

> On 04/12/2012 10:18 AM, emmanuel segura wrote:
>
>> That's right
>>
>> you'll found your cluster partitioned and if you "<cman two_node="1"
>> expected_votes="1">" as redhat setting our cluster maybe you get data
>> corruption
>>
>
> How? What fence agent are you using? I've used this configuration for
> years and never had data corruption.
>
>
>  Because every node can operate with one vote an rich the quorum state
>>
>> Forse the fencing problem redhat implement a work around as permanent
>> solution
>>
>> fence delay for some cluster agents
>>
>> For fence_scsi in Redhat 5.X the redhat support says it's ok for
>> production
>> BAAAAA not tre
>>
>
> What are you concerns about fence_scsi?
>
>
>  AND i the redhat technical tells the cluster don't require the quorum disk
>> UMMMMMMMMMMMMM
>>
>
> Can you explain why qdisk would be required?
>
> Ryan
>
>
>  Il giorno 12 aprile 2012 16:47, Daniel Bourque
>> <dbourque at accuweather.com>ha scritto:
>>
>>   A qdisk is just another way to maintain quorum in cluster. there is a
>>> special two node cluster mode designed to allow for quorum to be
>>> maintained
>>> by the surviving node.
>>>
>>>  <cman two_node="1" expected_votes="1">
>>> </cman>
>>>
>>>  But it's not very clear to me what happens with fencing if both nodes
>>> get partitioned on the network. Do they both try to fence each other off
>>> ?
>>>
>>>
>>> --
>>> Dan
>>>
>>>     ------------------------------
>>> *From:* linux-cluster-bounces at redhat.**com<linux-cluster-bounces at redhat.com>[
>>> linux-cluster-bounces at redhat.**com <linux-cluster-bounces at redhat.com>]
>>>
>>> on behalf of emmanuel segura [emi2fast at gmail.com]
>>> *Sent:* Thursday, April 12, 2012 9:25 AM
>>> *To:* linux clustering
>>> *Subject:* [Linux-cluster] Redhat without qdisk
>>>
>>>
>>>  Hello all List
>>>
>>> I have a big question about qdisk in a two cluster
>>>
>>> one of out clients has too many cluster in two nodes configuration and
>>> one
>>> RedHat technical came to us and said that there is no need to use the
>>> qdisk
>>>
>>> I would to know if this is true
>>>
>>> I really think it's a bad idea
>>>
>>> --
>>> esta es mi vida e me la vivo hasta que dios quiera
>>>
>>> --
>>> Linux-cluster mailing list
>>> Linux-cluster at redhat.com
>>> https://www.redhat.com/**mailman/listinfo/linux-cluster<https://www.redhat.com/mailman/listinfo/linux-cluster>
>>>
>>>
>>
>>
>>
>>
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>>
>
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-- 
esta es mi vida e me la vivo hasta que dios quiera
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