Planning cluster nodes

To plan cluster nodes, you specify which ones will serve as follower nodes. The one node in a cluster that is not a follower is the leader node.

To plan your cluster nodes:

  1. Write down the host and port of each of the Dgraph processes for each of the Oracle Endeca Servers that will host your data store.
    You will need this information to identify which of your nodes should serve as a leader node and to designate other nodes as follower nodes.
  2. Provision a shared file system on which the data files for the data store will be stored.
    When you will install the Oracle Endeca Server and start the data store on each of them, they should each point to the location of the data files (for the same data store) on this file system and have access to these files. (Read-only access is sufficient for follower nodes; write access is required for the leader node.)
  3. On the node you would like to designate as the leader node, reserve the port 2181.
    This port is used by the Cluster Coordinator service (unless you configure it to use another port). You will also specify this port when starting all nodes in your cluster.