A cluster system is a system that joins multiple systems (hereafter referred to as nodes) to achieve high availability.
If one of the nodes in a cluster system fails for any reason, any jobs operating on the node can be taken over by another node, keeping at
a minimum the time that a system must be stopped. Because a normally functioning node takes over a job while the failed node is being
repaired, recovery can be performed without any interruption to the job.
