Galera arbitrator resource agent

If you run XtraDB/Galera in a 2 nodes cluster, it implies that on a split-brain event both nodes will goes down. That’s the default behavior of the cluster management system of Galera. This could be changed but we don’t really want that. This is why we use garbd in order to prevent split-brain situation. Basically it connects to your cluster and acts as a member. Let’s say someone, inadvertently bring down the dedicated link interface of your cluster, you’re in big trouble. In this particular situation garbd will act as a replication replay. That will let you some time to investigate about the outage without any downtime.

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