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A host is a computer that can run jobs and a host group is a collection of hosts, which enable you to define and run jobs on any of the computers within the host group.
For example, if you have a job that might require more resources than the host ID where the job runs, you can define the job to run on host group. If the host ID is not able to handle the job, it is routed to another host, which has more resources, or the job is set to a Wait status. For more information, see Host groups.
You can implement load balancing with Host restrictions, which enable you to limit the number of jobs submitted to a specific host according to a defined CPU usage limit and the number of concurrently running jobs on a host . This helps you manage your resources and prevent them from being overloaded and indicates when a host resource is not used efficiently. For more information, see Host group restrictions.