[Pacemaker] auto_tie_breaker in two node cluster

[Kostiantyn Ponomarenko]

Honza,
Can you please explain what does "network based" mean?

Thank you,
Kostya


On Wed, May 21, 2014 at 10:54 AM, Jan Friesse <jfriesse at redhat.com> wrote:

> > I am not quite understand how auto_tie_breaker works.
> > Say we have a cluster with 2 nodes and enabled auto_tie_breaker feature.
> > Each node has 2 NICs. One NIC is used for cluster communication and
> another
> > one is used for providing some services from the cluster.
> > So the question is how the nodes will distinguish between two possible
> > situations:
> > 1) connection between the nodes are lost, but the both nodes remain
> working;
> > 2) power supply on the node 1 (has the lowest node-id) broke down and
> node
> > 2 remain working;
> >
> > In 1st case, according to the description of the auto_tie_breaker, the
> node
> > with the lowest node-id in the cluster will remain working.
> > And in that particular situation it is good result because the both nodes
> > are in good state (the both can remain working).
> > In 2nd case the only working node is #2 and the node-id of that node is
> not
> > the lowest one. So what will be in this case? What logic will work,
> because
> > we have lost the node with the lowest node id in 2-node cluster?
> >
> >> there is no qdiskd for votequorum yet
> > Is there plans to implement it?
> >
>
> Kostya,
> yes there are plans to implement qdisk (network based one).
>
> Regards,
>   Honza
>
>
> > Many thanks,
> > Kostya
> >
> >
> >
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