Originally Posted by Josephwpc
OK based on the reading from these FQA, I should configure the fencing for my two-nodes cluster, but what kind of fence device I should configured for my cluster???
Also, based on my reading, the Fencing is the component of cluster project that cuts off access to a resource (hard disk, etc.) from a node in your cluster if it loses contact with the rest of the nodes in the cluster. So for a two-nodes cluster if both nodes lose contact with each other both nodes will fencing itself, right? Is this will cause either both nodes give up the cluster ownership or both nodes own the cluster ownership? So, we need to have some kind of "tie-breaker" to solve this???
( First of all, I'm not an expert on RedHat fencing, so double check my answers if you're in doubt. Or contact support.
I don't know what kind of fence device you should use. Most go for at network power switch it seems.
It the two nodes loose contact with each other they will start fencing each other. I have also seen that a node kills itself in such a scenario, and I think this has to do with some kind of timeout mechanism (don't recall its name).
The cluster manager implements a mechanism called "quorum" to ensure that the "split-brain" scenarios you described does not occur.