[Pacemaker] Quorum in even numbered Cluster

[Roman Schartlmüller]

>> 
>> Hi,
>> 
>> please explain me, how a pacemaker cluster, with an even number of nodes,
>> selects quorum when the cluster splits into two evenly parts. For example
>> a four-node-cluster breaks into two partitions each with two nodes.
>> 
>> Best regards,
>> Roman
> 
> Quorum says that the should be *more* than half of the original nodes. If a 
> even numbered cluster splits into two halfs none of the nodes has quorum. 
> Quorum will never work in a two-node cluster.
> 
> Same applies to even-numbered clusters distributed even over two computer 
> centers.
> 
> Greetings,
> 
> -- 
> Dr. Michael Schwartzkopff

Hi,
you helped me a lot. 
I am reading your book and there you are writing something about a pluggable quorum framework. I think you are meaning the corosync_quorumtool, aren't you?

Do you have any idea to configure it? I don't find anything about to configure it.

Best regards,
Roman