[Pacemaker] spilit brain situation

[Dominik Klein]

Romi Verma wrote:
> Thanks for fast reply ,
> Ok, Let me explain the situation. i have two nodes cluster . i pulled out
> the network cable of one
> node which produced spilit brain situation. this time both nodes are
> thinking that other one is dead.  each node is thinking itself as DC and on
> each node cluster is up and running without quorum.
> 
> i am new to openais/pacemaker so dont know much but according to some
> documents it seems by default no-quorum-policy is  to "stop" the cluster. i
> have not specified any no-quorum-policy that's why i expect that my cluster
> should stop if it looses quorum somehow.

The "stop" refers to the resources. policy=stop on a node with no quorum
means: do not run any resources.

"ignore" would mean: run resources even though we don't have quorum
(like the old heartbeat behaviour would be)

"freeze" would mean: run and manage what you did run up to this point,
but don't aquire any other resources.

Regards
Dominik

> But in present spilit brain situation , on each node cluster is up and
> running without quorum.   could you please explain why this is happening.
> 
> Romi
> 
> 
> On Fri, Feb 6, 2009 at 12:52 PM, Andrew Beekhof <beekhof at gmail.com> wrote:
> 
>> Well the no-quorum-policy option applies during the split and an election
>> is held to determine the DC when the partitions reform.
>> Can you be more specific please?
>> On Feb 6, 2009, at 4:54 AM, Romi Verma wrote:
>>
>>
>>
>> hi all,
>>> how does openais + pacemaker (suse 11) cluster handles spilit brain
>>> situation .  can any one explain.
>>>
>>> Thanks,
>>> Romi.
>>>
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