cluster

A cluster is composed of a set of MDEX Engine nodes each of which can serve query requests. Only one node is identified as the leader node; All other nodes are follower nodes. There is one copy of the MDEX Engine index that is shared and used by all MDEX Engine nodes. Nodes can be added or removed dynamically, without having to stop the cluster.

The Cluster Coordinator provides communication between the nodes in the cluster and notifies the nodes about index updates and updates to the configuration.

See also leader node and follower node.