Deploying manager-only nodes

Manager nodes provide optimized stability and performance for ExtraHop recordstore clusters and are required for clusters with six or more nodes. A manager-only node is dedicated to cluster management tasks and does not store records. This guide provides guidelines for adding three manager-only nodes to new and existing clusters with six to nine data-only nodes.

Manager nodes are virtual appliances with reduced resource specifications. Recordstore clusters typically require that all nodes match in both appliance type (virtual or physical) and size (resource specifications). However, manager-only nodes are the exception: a virtual manager-only node can be added to a cluster that has physical nodes and different resource specifications. Your data-only nodes should still match.