[Pacemaker] How pacemaker handle split brain

[Andrew Beekhof]

On Wed, Dec 16, 2009 at 2:24 AM, Javen Wu <wu.javen at gmail.com> wrote:
> Hi Folks,
>
> I have a question on pacemaker split brain. Once a cluster is partationed
> due to the network problem. If my understanding on the code is correct, two
> subcluster all have their private DC regardless who holds the quorum.
> So how the quorum winner subcluster take control of the whole cluster and
> fence the other partation? I didn't see the election algorithm introduce the
> concept of quorum.
>
> Could you answer me?

As per the conversation on IRC, DC election has nothing to do with quorum.
But only the DC that also has quorum is able to fence the unseen nodes
and run resources.