Cluster

A cluster is the group of computing machines that can individually run the software. Clusters are typically utilized to achieve high availability for server software.

Clustering is used in many types of servers for high availability.

App Server Cluster – An app server cluster is the group of machines that can run an application server that can be reliably utilized with a minimum of downtime.

Database Server Cluster – A database server cluster is the group of machines that can run a database server that can be reliably utilized with a minimum of downtime.