active-standby cluster

A server cluster that is made up of active and standby nodes. An active-standby cluster environment reduces application downtime in the event of server failure. In this environment, the active node is the physical server that performs application tasks. The standby node assumes control in the event of active node failure by taking ownership of application volumes and starting application services. When the failed node becomes available, it can act as the standby node in the cluster or again be the active node. Combined with global-active device pairs, the application remains highly available in the event of host or storage failures.