A cluster system is a system that joins multiple machines (hereafter, referred to as servers) to achieve high availability and scalability throughout the system.
This allows the creation of systems that simultaneously achieve high availability and scalability.
For example, by transferring the role to another server when a server in the cluster system fails, the downtime for the entire system can be made shorter.
This type of operation mode is referred to as a "failover operation".
The load should be distributed, in order to extend the processing capacity across the entire system by dividing multiple application processes amongst multiple servers, regardless of processing content, or to suit the processing content.
